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Kahrs Original Harmony Collection: Oak Soil 5/8" x 7 7/8" Engineered Hardwood 153N6EEKFEKW

Kahrs Original Harmony Collection: Oak Soil 5/8" x 7 7/8" Engineered Hardwood 153N6EEKFEKW

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January 2009

Professional Residential Installation Guide

Table of Contents

Jobsite

Subfloor Preparation

Kährs Koncept Installer Program

Underlayments

Layout

Calculation Worksheet for Min. Board Width ( U.S. Std.)

Calculation Worksheet for Min. Board Width (Metric)

Required Expansion Reference Chart (Metric)

Required Expansion Reference Chart ( U.S. Std.)

Tools & Techniques

Important Installation Notes

Kährs Product Key

Adhesive Tack and Open Time

Float-In Installation 7mm, 10mm, 14mm, 15mm Woodloc

Float-In Installation Traditional Tongue & Groove 14, 15mm

Radiant Heat Applications (Float-In only)

Glue-Down Installation 7mm, 10mm, 14mm, 15mm Woodloc

Glue-Down Installation Traditional Tongue & Groove 14, 15mm

Glue-Down Installation 11mm Studio TM & Mega Studio

Herringbone Installation of 11mm Studio

Nail-Down Installation Traditional Tongue & Groove 14, 15mm

Staple-Down Installation of Studio TM & Mega Studio TM , 11mm

Follow Up

Recoating your Kährs Floor

Molding Profiles & Installation

Glossary of Terms

I n order to ensure that the most current information is available to you, Kährs does not distribute printed copies of this guide. You are welcome to print all or parts of the Installation Guide from this website. Please note that this guide describes approved installation methods and compatible products. Kährs approves only these installation methods and products. Always check with the Kährs Technical Department at 1-800-ASK-KAHRS if you have any questions.

Te c h n i c a l S u p p o r t 1 - 8 0 0 - A S K - K A H R S w w w. k a h r s . c o m

Jobsite

Subfloor Preparation

Note: Warranty coverage may be lost due to failure to strictly follow all installation instructions and recommendations and/or the use of improper materials or tools.

READ ALL INSTRUCTIONS CAREF ULLY!

Subfloor Specifications

A. The surface of the subfloor must be level to within 1/8" in an 8ft. radius. Check this by using the edge of a Kährs or Linnea plank to find high/low spots. To fill excessive voids or variations in the subfloor, use leveling compounds approved for your application. Consult the compound manufacturer to be sure it is appropriate. Allow the compound to dry thoroughly before beginning wood floor installation. Fifteen-pound felt or roofing paper is also appropriate to level a floor for a float-in installation. Cut small pieces to fit the shape of the depression and then stack as many sheets as necessary to level the area. DO NOT us this method to correct extensive variations in concrete subfloors.

B. You must test concrete subfloors prior to installation by one of the following methods. Concrete subfloors must not contain more than 3 lbs. moisture on a dry-weight basis (calcium chloride test). Subfloor must read 4.5 or less with Tramex meter. Follow ASTM 2170 - subfloor relative humidity not to exceed 75% with in-situ probe. Moisture content of wood subfloors must be less than 12% Moisture Content (MC). Document and keep ALL test results.

C. The subfloor must be clean.

D. Relative humidity at the job site must be, and remain, minimum 30%, maximum 60%. Temperature setting must be, and remain, within 15º F of normal operating range.

Evaluation

Before installing a Kährs floor, inspect the job site thoroughly. With the help of the Installation Environment Chart determine if grade, subfloor, and subfloor conditions are acceptable for the installation method you plan to use.

Exterior: Carefully inspect the outside surroundings for improper drainage and predictable or obvious sources of moisture. The yard should be graded (at least 6" in 10 ft.) to slope away from the foundation. Be sure that gutters and eaves sufficiently prevent rain from penetrating the foundation.

Under the house: In homes with crawl space or pier-beam foundations, foundation vents must provide cross-ventilation with no dead air space. Vents should be located throughout the foundation with opening area equal to 1-1/2% of the square-foot area within the crawl space (e.g. a 1000sq. ft. crawl space must have 15 sq. ft. of vents that remain open all year). If excessive moisture exists underneath the house, you must lay a 6 mil black polyethylene moisture barrier on the ground in the crawl space below the installation area.

Interior: Check the moisture content of the subfloor. See item "B" above as well as "Moisture" at the end of this section. Room conditions can also indicate high moisture and relative humidity. Look for water stains, peeled paint near windows and doors, and rusty metal, especially nails.

Preparation

Wood Subfloors: Moisture Content (MC) must be less than 12%. To prepare the subfloor for installation, renail any loose areas with squeaks. Sand or plane any high spots and fill any low areas. The subfloor should not vary more than 1/8" in an 8' radius. Check this by using the edge of a Kährs or Linnea plank to find any high or low spots. See Installation Environmental Chart for Approved Subfloors.

Preferred Subflooring : 3/4" (23/32", 18.3 mm) CDX grade plywood subfloor/underlayment (Exposure 1) 4' x 8' sheets OR 3/4" (23/32" 18.3mm) OSB subfloor/underlayment grade, with joint spacing 19.2" (475mm) on center joint construction or less. Direct Glue-Down installations: 2 layers 1/2" (11.9mm) CDX plywood.

Minimum Subflooring : 5/8" (19/32", 15.2mm) CDX plywood subfloor/underlayment (Exposure 1) 4' x 8' sheets, maximum 16" (400mm) on center joint construction. Direct Glue-Down installations: 2 layers 3/8" (10mm) CDX plywood.

Follow panel manufacturer recommendations for spacing and fastening. Typical panel spacing for joint systems is 1/8" (3.2mm) around perimeter and fastened every 6" (150mm) on bearing edges and every 12" (300mm) along intermediate supports.

Door casings should be notched or undercut to avoid difficult scribe cuts.

If nailing the floor, (Kährs 14, 15mm Traditional Tongue & Groove only) we suggest you cover the sub floor with 15 lbs. or higher asphalt felt or rosin paper to retard moisture and to help alleviate variations in the subfloor.

Concrete Subfloors : Lightweight (float-in only) and standard-density (float-in and glue-down) concrete subfloors are ideal applications for a Kährs floor. Concrete subfloors are generally acceptable for float-in installation if the subfloor appears to be dry (i.e. no standing water or discoloration of concrete) and Kährs Combo System Underlayment is used and installed properly. Be sure that, as a minimum, any concrete subfloor is at least 50-60 days old before installing a wood floor over it.

Moisture

To curb the adverse effects moisture will have on a Kährs wood floor and to determine the source of moisture problems, use the following checklist:

1. Inspect the gutters, drains, and down spouts outside the house. Clear out any clogs caused by leaves, dirt, or other substances. Down spouts are designed to transport water away from a foundation.

2. Check the landscaping surrounding the home to be sure the yard is sloped away from the foundation (at least 6" in 10 ft.).

3. Check windows and doors for proper drainage and waterproof caulking.

4. Inspect concrete subfloor for cracks or buckling. Sometimes the water table (water beneath the surface) may rise and force water up through the concrete floor with hydrostatic pressure.

5. Check the ventilation system in the crawl space, basement, and attic. Moisture will collect on walls and floors if dead air (i.e. little or no ventilation) is present. As a rule, ventilation per sq. ft. should equal 1-1/2% of the sq. ft. of the area in question.

6. Inspect pipes, water heater tank, dishwasher, and any other plumbing fixtures in the affected area.

7. Remember to take seasonal changes in relative humidity into consideration when installing a Kährs floor.

8. Signs that the moisture content is too high include discolored (darker) concrete and evidence of actual water droplets.

Required moisture testing for ALL Kährs radiant heat installations and direct glue-down flooring:

Calcium Chloride test with a reading of 3 lbs. or less on a dry weight basis (2 lbs. or less for Radiant Heat Installations). Testing kits are generally available through your distributor or call the NWFA at 800- 422-4556 (or 800-848-8824 in Canada ) for the source nearest you. Follow test kit manufacturer's instructions for conducting test and measuring results. If calcium chloride results read over 3 lbs. but does not exceed 8 lbs. (and no obvious source of the moisture can be eliminated) you must use either of the following approved moisture sealers before installing the floor for the Kährs Moisture Protection Warranty to apply:

• DriTac MCS 7000 when used with DriTac 7600 or 7500 Adhesive (call 800-394-9310 for source nearest to you).

• Dependable Cutdown (call 800-227-3434 for the source nearest you).

• Concrete Moisture Barrier System*

* If moisture is present an alternative is a barrier of inexpensive sheet vinyl or "slip sheet" (PVC). Use the manufacturers recommended adhesive for a full spread application to completely adhere the vinyl to the subfloor. Since Kährs cannot guarantee the bond of the vinyl to the subfloor, or subsequent performance of the vinyl, a patch test is strongly advised. Install several 3" x 3" pieces of vinyl in different areas of the installation. Wait 72 hours. Remove the vinyl. If the backing remains attached to the concrete, the subfloor should be acceptable for full spread vinyl installation.

Note: These concrete sealers are NOT approved for Radiant Heat installations.

All concrete sealer/vinyl manufacturer testing, documentation, and installation requirements MUST be followed for Kährs Limited Warranty to apply.

Other Subfloors : Kährs floors can be installed directly over some existing floors (i.e. vinyl and rubber tile, steel plates, terrazzo, and existing wood floors). The subfloor or existing floor must meet the requirements listed in "Subfloor Specifications." A Kährs floor installed over existing floors must be installed with the float-in method.

Installation Environment Chart

I. Grade Type Glue** Nail* Float
A. Above Grade Yes Yes Yes
B. On Grade Yes Yes Yes
C. Below Grade No No Yes
D. Over Radiant Subfloor No No Yes
II. Subfloor Type Glue** Nail* Float
A. Concrete (701 lbs. cu. ft. density or higher) Yes No Yes
B. Light-weight Concrete No No Yes
C. Association-grade underlayment plywood Yes Yes Yes
D. Association-grade underlayment particle board Yes No Yes
E. Stamped Underlayment Grade OSB (Oriented Strand Board) Yes Yes Yes
F. Old wood floors - above grade only No No Yes
G. Asphalt Tile No No Yes
H. Inlaid linoleum *** No Yes
I. Vinyl asbestos tile No No Yes
J. Cushion vinyl No No Yes
K. Rubber tile No No Yes
L. Solid vinyl tile No No Yes
M. Steel No No Yes
N. Marble No No Yes
O. Ceramic No No Yes
P. Carpet No No No
*14mm & 15mm T&G only
*** Check Kährs Technical Services Department: 1-800-ASK-KAHR

Kahrs Koncept Installer Program

Kahrs International, and our distributor partners, sponsor a two-day school open to eligible, professional hardwood flooring mechanics. Koncept schools are distributor based and are held regularly throughout North America . The course covers all installation and repair techniques approved by Kahrs. Graduates are honored with a Kahrs approved guaranteed installation. For details and school locations, contact Kahrs Technical Services via e-mail (from the Kahrs website) or call 1-800-800-5247.

Underlayments

  • Kährs Combo-system Underlayment
  • Kährs Quiet Stride

Combo Foam Underlayment System with Overlap :

The width of a row of Kährs Combo-System Underlayment is comprised of 40" of underlayment plus an 8" overlap flap. The overlap flap guards the flooring from moisture at the seams, where the rows of underlayment are laid side by side. The overlap flap has a peel and stick strip to aid the installation process.

1. Layout 1st row of underlayment (logo side down, blue side up) with the overlap flap facing the starting wall. Allow the underlayment to wrap up the wall, on the ends, approx. 2".

2. Reach under and grab the overlap flap and pull it up so it lies against the starting wall. Trim this over lap flap back to leave approx. 2" of plastic up the wall. (Use this cut off section to repair damage in the underlayment as needed*, see note below).

3. Lay 2nd row of underlayment flush to first. Make sure the overlap flap is next to 1st row, and the ends wrap up the walls. (If flooring installation has already begun, make sure to stop the flooring approx. 8 inches from the side of the underlayment to allow for the installation of the overlap flap.)

4. Again, reach under and grab the overlap flap. Pull the flap up and fold it back to expose the peel and stick strip. Remove the white protective cover from the adhesive strip. Lay overlap flap across the 1st row of underlayment and press into place.

5. Continue this procedure row by row until the entire floor area is covered.

* Note : When connecting a new roll of underlayment to the end of the roll you are working on, or for repairing any tears or cuts in the underlayment; overlay the butt joints or the damaged area with a spare piece of overlap plastic. This spare piece should overlay by approx. 8". Hold the spare piece in place with tape. Do NOT overlap underlayment. Overlap flap only.

Cover the entire floor area and run the underlayment up the perimeter walls approximately 2". This provides a secure enclosure for the flooring. After the floor is installed and before the installation of the baseboards, the excess underlayment should be trimmed to the height of the floor surface using a fine trimming blade. The use of the Combo-System Underlayment is also approved for Radiant Heat applications.

Kährs QuietStride:

Quiet Stride can be installed three different ways as a Kährs underlayment.

1. Float-in Installations: First install 6 mil polyethylene plastic loose-laid, seams overlapped 8". Run plastic up the wall 2" (trim excess after installation, before installing trim). Loose-lay QuietStride on top of plastic, wall to wall, and butt all seams together (taping seams preferred). Use of QuietStride with polyethylene plastic is approved for float-in Radiant Heat applications.

2. Direct Glue-Down: Install QuietStride wall to wall, butt all seams together (do not tape seams), directly adhering to subfloor with QuietStride Adhesive* or a premium multi-purpose adhesive. Fully adhere Kährs flooring to underlayment using approved adhesive and trowel (see Glue-Down Installation for details). Note: an approved concrete sealer must be used if calcium chloride test exceeds 3lbs. for Kährs Moisture Protection Warranty to apply.

3. Direct Glue-Down over "float-in" underlayment: First install 6 mil polyethylene plastic loose-laid, seams overlapped 8". Run plastic up wall 2" (trim excess after installation, before installing trim). Loose-lay QuietStride on top of plastic, wall to wall, butt all seams together (do not tape seams). Fully adhere Kährs flooring to underlayment using approved adhesive and trowel (see Glue- Down Installation for details). Note: an approved concrete sealer must be used if calcium chloride test exceeds 3lbs. for Kährs Moisture Protection Warranty to apply.

* QuietStride Adhesive has been developed for adhering QuietStride Underlayment directly to the subfloor for use in "double-stick" installations. The adhesive is a quick, inexpensive technique for affixing QuietStride Underlayment to the subfloor, then gluing the Kährs flooring to the QuietStride Underlayment with one of the approved Kährs wood flooring adhesives.

• QuietStride Adhesive product ID #710248

• Sold in 1gallon pail

Layout

Calculation Worksheet for Min. Board Width - (U.S. Std.)

Purpose: To ensure last board of the installation (or long board at an obstruction) is not too narrow.

General Rule: Kährs requires that no board have a width less than 3" or .38" of a full board width.

Notes on Equation: This rule applies to boards with an original thickness of 5/8" x 3-strip wide. This equation should be used when a board 4' or more in length meets an obstruction.

WORKSHEET

Step 1

Measure width of connected area* from starting wall to finish wall or obstruction, in inches. Round to the nearest 1/4".

Connected Area Width in inches with fraction: __________________

Step 2

Convert "inches with Fraction" to "Inches with Decimal". Use conversion chart below.

Connected Area Width in inches with decimal: __________________

Step 3

Multiply "Required Expansion Space" by 2. Use Chart below.

Connected Area Width
(From Step 2)
Expansion Space
Total
Under 144" 1/4" x 2 = . 50"
144" - 288" 1/2" x 2 = 1.0"
288" - 480" 3/4" x 2 = 1.5"

Total Expansion Needed from above: __________________

Step 4

Subtract Total Expansion Needed from Connected Area Width to determine Actual Floor Width.

Total from Step 2: _____________._____"

Total from Step 3: - _____________._____"

Actual Floor Width in inches with decimal: = _____________._____"

Step 5

Determine total # of rows of flooring needed.

Actual Floor Width (Step 4): _____________._____"

Board Width in Decimal - measure board and use chart below to convert: ÷ _____________._____"

Total Rows of Flooring: = _____________.__rows

Step 6

If the result in Step 6 contains a decimal less than .38", you must rip the starting row in half to ensure proper width of the last row.

Connected Area Width Expansion Total

(from Step 2) Space

Under 144" 1/4" x 2 = .50"

144" - 288" 1/2" x 2 = 1.0"

288" - 480" 3/4" x 2 = 1.5"

EXAMPLE

Step 1

Measure width of connected area* from starting wall to finish wall or obstruction, in inches. Round to the nearest 1/4".

Connected Area Width in inches with fraction: 325-1/4"

Step 2

Convert "inches with Fraction" to "Inches with Decimal". Use conversion chart below.

Connected Area Width in inches with decimal: 325.25"

Step 3

Multiply Required Expansion Space by 2. Use chart below.

Connected Area Width (From Step 2) Expansion Space
Total
Under 144" 1/4" x 2 = .50"
144" - 288" 1/2" x 2 = 1.0"
288" - 480" 3/4" x 2 = 1.5"

 

 



Total Expansion Needed from above: 1.5"

Step 4

Subtract Total Expansion Needed from Connected Area Width to determine Actual Floor Width.

Total from Step 2: 325.25"

Total from Step 3: - 1.50"

Actual Floor Width in inches with decimal: = 323.75"

Step 5

Determine total # of rows of flooring needed.

Actual Floor Width (Step 4): 323.75"

Board Width in Decimal - measure board and use chart below to convert: ÷ 7.875"

Total Rows of Flooring: = 41.11 rows*

* The first board in this installation would be cut in half.

Step 6

If the result in Step 6 contains a decimal less than .38", you must rip the starting row in half to ensure proper width of the last row. Ripping the starting row in half will increase the last board width by .50 of a board. In this case the last board will end up being .61 of a board or approx. 5", instead of .11 or 1" wide.

*From Step 1 - Connected Area is defined as all areas connected without a break. If Room A and Room B both are to have flooring installed and are directly connected, or connected by a hallway, without a t-molding, the connected area is the width of both Room A and Room B , and the hallway (if applicable). Obstructions can include cabinets, islands, and the wall opposite the starting wall in the same room, if the flooring continues to another room without a break. Multiple calculations may need to be made to best determine the amount cut from the starting row.

Fraction to Decimal Conversion Chart

Fraction Decimal Equivalent
1/4" .25"
1/2" .50"
3/4" .75"

Board Width Decimal Conversion Chart

Board Width Decimal Equivalent
7 7/8" 7.875"
8 1/10" 8.10 "

Calculation Worksheet for Minimum Board Width - (Metric)

Purpose: To ensure last board of the installation (or long board at an obstruction) is not too narrow.

General Rule: Kährs requires that no board have a width less than 76 mm or .38" of a full board width.

Notes on Equation: This rule applies to boards with an original thickness of 15mm x 3-strip wide. This equation should be used when a board 4' or more in length meets an obstruction.

WORKSHEET

Step 1

Measure width of connected area* from starting wall to finish wall or obstruction, in inches. Round to the nearest 1/4".

Connected Area Width in mm: __________________

Step 2

Multiply required expansion space by 2. Use conversion chart below.

Required Expansion Space: __________________mm x 2

Total Expansion: __________________mm

Step 3

Subtract Total Expansion Needed from Total Area Width to determine Actual Floor Width.

Total from Step 1: _____________._____mm

Total from Step 2: - _____________._____mm

Actual Floor Width: = _____________._____mm

Step 4

Determine total # of rows of flooring needed.

Actual Floor Width (Step 3): _____________._____mm

Board Width. Measure board. It will be either- 200 or 205 mm: ÷ _____________._____"

Total Rows of Flooring: = _____________.__rows

Step 5

If the result in Step 6 contains a decimal less than .38", you must rip the starting row in half to ensure proper width of the last row

* From Step 1 - Connected Area is defined as all areas connected without a break. If Room A and Room B both are to have flooring installed and are directly connected, or connected by a hallway, without a t-molding, the connected area is the width of both Room A and Room B , and the hallway (if applicable). Obstructions can include cabinets, islands, and the wall opposite the starting wall in the same room, if the flooring continues to another room without a break. Multiple calculations may need to be made to best determine the amount cut from the starting row.

Required Expansion Space Chart

Floor Width Space Needed
up to 750 mm 12 mm
750 - 1200 mm 20 mm

Required Expansion Reference Chart (Metric)

Purpose: To ensure proper expansion space around all walls, doors and obstructions for 7mm, 14mm and 15mm flooring.

Required Expansion Rules:

(1) Kährs requires 1.5mm of expansion space for every 1m of Connected Area width or 2.5m of Connected Area length (whichever is greater). This expansion space must be left around all walls, doors and obstructions. Minimum expansion requirement is 12mm.

(2) No connected flooring can span greater than 12m in width or 36m in length.

Notes:

(1) Connected area is defined as all areas connected without a break. If Room A and Room B both are to have flooring installed and are directly connected, or connected by a hallway, without a t-molding, the Connected Area is the width of both Room A and Room B , and the hall way (if applicable). Obstructions can include cabinets, islands, and the wall opposite the starting wall in the same room, if the flooring continues to another room without a break. Multiple calculations may need to be made to best determine the amount cut from the starting row.

(2) The direction of the flooring must be determined prior to calculating the required expansion space. The Connected Area width is parallel to the board width. The Connected Area length is parallel to the board length.

Required Expansion Reference Chart

Connected Area Width Required Expansion Space* Connected Area Length Required Expansion Space*
up to 750 cm 12 mm Up to 2250 cm 12 mm
750 cm - 1200 cm 20 mm 2250 cm - 3600 cm 20 mm

* Determine the required expansion space for both width and length, then use the larger of the 2 on all sides, and around all obstructions.

Required Expansion Reference Chart - (U.S. Standard)

Purpose: To ensure proper expansion space around all walls, doors and obstructions.

Required Expansion Rules:

(1) Kährs requires 1/16" of expansion space for every 3' of Connected Area width or 9' of Connected Area length (whichever is greater). This expansion space must be left around all walls, doors and obstructions. Minimum expansion requirement is 1/2".

(2) No connected flooring can span greater than 40' in width or 120' in length.

Notes:

(1) Connected area is defined as all areas connected without a break. If Room A and Room B both are to have flooring installed and are directly connected, or connected by a hallway, without a t-molding, the connected area is the width of both Room A and Room B , and the hall way (if applicable). Obstructions can include cabinets, islands, and the wall opposite the starting wall in the same room, if the flooring continues to another room without a break. Multiple calculations may need to be made to best determine the amount cut from the starting row.

(2) The direction of the flooring must be determined prior to calculating the required expansion space. The Connected Area width is parallel to the board width. The Connected Area length is parallel to the board length.

Required Expansion Reference Chart

Connected Area Width Required Expansion Space* Connected Area Length Required Expansion Space*
up to 24' 1/2" up to 72' 1/2"
24' - 40' 3/4" 72' - 120' 3/4"

* Determine the required expansion space for both width and length, then use the larger of the 2 on all sides, and around all obstructions.

Tools & Techniques

Important Installation Notes

Installation

Floating:

Maximum room dimensions for a floating floor are 40ft. across the boards or 120 ft. lengthwise. Floors exceeding either of these dimensions require use of "T-Molding."

A minimum of one butt seam is required in every row, regardless of width (e.g. hallways). Never attach any permanent object through the flooring, affixing it to the subfloor. A float-in floor must be free to expand and contract in all directions.

Double Gluing (Traditional T & G Flooring Only):

Increases the strength of the bond between boards by 90% over single gluing. This is required for all commercial installations.

Glue down / Nail down:

Installing Kährs floors with the Glue down or Nail down method requires no expansion breaks in the floor and is not limited in size. A 1/2" gap at perimeter walls is required to allow engagement of last boards.

Adhesive Tape on Kahrs Floors:

The use of adhesive tape on any Kährs floor for any reason (i.e. to fasten temporary protection) is not recommended and is not covered in our warranty.

Kahrs Flooring is approved for installations in ½ bathrooms only (no bathrooms including showers or bath tubs)

Expansion in Large Areas

You may be able to attain the necessary added expansion by trimming the wallboard (i.e. sheetrock) or raising baseboards before installing floor. This will allow the floor to expand underneath the wall. For complete information please refer to Required Expansion Reference Charts on pages 8 and 9 in the Layout section of this Guide. A Kährs floor requires 1/16" expansion for every 3' across width and 1/16" expansion for every 9' along length. For example, a 28' x 28' space requires an expansion gap of 9/16" around the edge of the flooring.

Additional Finish Coating

For additional wear protection, a waterborne urethane finish is compatible with Kährs factory finishes. The following products from Bona Kemi are recommended:

• Pacific Strong

• Traffic

Contact Bona Kemi USA, Inc. (1-800-574-4674). Follow manufacturers instructions for recoating a prefinished wood floor. Kährs International, Inc. does not guarantee the performance and/or durability of these products.


Tools & Techniques

Installation

Do you have the tools and products you need to install a Kahrs or Linnea floor?

Never start a job unprepared! Each installation method requires different tools and products. Use the chart below to be sure you are fully prepared to begin your installation. For your convenience, product codes (SKU's) are listed next to each Kährs product name. Where appropriate, square footage and other important information is included as well.

Kahrs Product Key

(Listed by Installation Method)

Product/Material SKU Float Radiant Heat Glue Down Nail Down
Kahrs 15 mm Flooring - Woodloc Various Yes Yes Yes No
Kahrs 15 mm Flooring - Tongue & Groove Various Yes Yes Yes Yes
Kahrs 14 mm Flooring - Tongue & Groove Various Yes Yes Yes Yes
Kahrs 14 mm Flooring - Woodloc Various Yes Yes Yes No
Kahrs 11 mm Flooring - Tongue & Groove Various No No Yes Yes
Kahrs 10 mm Flooring - Woodloc Various Yes Yes Yes No
Kahrs 7 mm Flooring - Woodloc Various Yes Yes Yes No
Combo System Underlayment (Subfloor) 710730CSU Yes Yes No Tar/Roofing
Quiet Stride Underlayment 710113 Yes Yes Yes No
Quiet Stride Adhesive 710248 No No Yes No
Prefinished Moldings Various Yes Yes Yes Yes
Landobond Adhesive; 239 sq. ft. bottle 710225 Yes Yes Yes Yes
Knocking Block, T&G Float-in and Nail Down, 14 mm & 15 mm 710202 Yes Yes No Yes
Knocking Block, T&G Woodloc Glue Down 14 mm & 15 mm 710281 No No Y es No
Knocking Block Glue Down 11 mm 710290 No No Yes No
Woodloc Hand Block (Woodloc only) 710266 Yes Yes No No
Woodloc Installation Wedge (Woodloc only) 710267 Yes Yes No No
Last Board Puller (Jemmy) 710203 Yes Yes Yes Yes
Nail Plate Adapter 15 mm for use with Bostitch Mach III 710268 No No No Yes
Nail Plate Adapter 14, 15 mm for use with Bostitch Mach III 710269 No No No Yes
Expansion Shims 710283 Yes Yes Yes Yes
Recommended Mastic *** Taylor 2071, Dri Tac, Stauf Various No No Yes No
Spline - Kahrs 11, 14, 15 mm only - to change directions ** Yes Yes Yes Yes
Router Bit Kahrs 11 mm 710291S Yes Yes Yes Yes
Router Bit Kahrs 14, 15 mm 710291 Yes Yes Yes Yes
Kahrs Wood Cleaner 710280 Yes Yes Yes Yes
Peel & Stick Floor Protectors 710287 Yes Yes Yes Yes
Touch Up Kits 710273-79 Yes Yes Yes Yes


Adhesive Tack and Open Times
Temperature/Relative Humidity Time Chart

Temp. Humidity
40% 50% 60% 70% 80%
60° Tack 120 min. 110 min. 100 min. 90 min. 80 min.
Open 3.5 hr. 3.5 hr. 3.5 hr. 3 hr. 3 hr.
65° Tack 110 min. 100 min. 90 min. 80 min. 70 min.
Open 3 hr. 3 hr. 3 hr. 3 hr. 2.5 hr.
70° Tack 100 min. 90 min. 80 min. 70 min. 60 min.
Open 3 hr. 3 hr. 3 hr. 2.5 hr. 2.5 hr.
75° Tack 90 min. 80 min. 70 min. 60 min. 50 min.
Open 3 hr. 2.5 hr. 2.5 hr. 2.5 hr. 2.5 hr.
80° Tack 80 min. 70 min. 60 min. 50 min. 40 min.
Open 3 hr. 2.5 hr. 2.5 hr. 2.5 hr. 2 hr.
 
Note : This chart is for reference only. Actual times may vary dramatically based on jobsite conditions.

Tools & Techniques

Float-In Installation for Woodloc

Notes:

• For subfloor and environmental specifications and requirements, see Jobsite / Subfloor Preparation section. Floating installation requires the use of Kährs Approved Underlayment Systems. Refer to Underlayment section of this Guide.

• Kährs flooring is covered by a Lifetime Guarantee. However, Guarantee coverage may be lost due to failure to strictly follow all installation instructions and recommendations or the use of improper materials or tools.

READ ALL INSTRUCTIONS CAREFULLY.

IMPORTANT!

Do not open packages until ready to begin installation! Inspect boards as you go. Kährs flooring is sealed at the factory with a 7% moisture content. Opening cartons to acclimate the flooring (as with some solid strip flooring) could result in a difficult installation.

• As an installer, it is your responsibility to be aware of the grade, Relative Humidity of the room, and moisture content of the subfloor. You should check that each plank is free of damage or manufacturing defects. Any unusable boards should be set aside for later replacement.

Tools and Materials Required

• Tape Measure

• Chalk Line

• Last Board Puller

• Hammer

• Woodloc TM Knocking Block

• Woodloc TM Installation Wedge

• Expansion Shims

• Floor Protectors

For SKU numbers see Kährs Product Key in Tools & Techniques, this Guide.

Step 1

Start in corner and lay first row with tongue sides toward walls. Proper expansion space can be achieved by pulling floor away from wall once first three rows have been installed (reference Step 9). For proper expansion refer to calculation worksheet.

Step 2

Hold next board against first board at approx. 45º angle and lay flat on floor. Continue in this manner for entire first row.

Step 3

Cut end board in first row to correct length and start second row with left-over piece (if possible) as shown in Fig 4. End joints must be staggered by at least 12" for 7mm and 10mm or 20" for 14mm and 15mm Kährs. Butt seam must be placed in each row regardless of width, e.g. hallways.

Step 4

Hold board at approx. 45º angle to board in front. Press forward to engage joint and lay flat on floor.

Step 5

Push in Kährs Wedge under short end of last board installed.

Step 6

Engage short end of new board as in Step 2. Lay flat keeping long side in line with groove of adjacent board.

Step 7

Using Kährs knocking block, carefully tap long edges together until they are closed. DO NOT tap too hard or over-engage. Never tap directly against wearlayer.

Step 8

Remove wedge and gently tap with knocking block along open long seam while applying pressure downward, until board lays flat. Board should fall easily into place.

Step 9

When three rows have been laid, pull floor away from starting wall until there is proper amount of expansion space. Place shims between floor and wall to maintain this space.

Step 10

If first row must be cut to match crooked wall, trace shape of wall on flooring, making sure space is allowed for expansion. Disengage boards of first row by gripping long side and pulling upward while simultaneously giving long joint a light tap. Saw to shape.

Step 11

Re-lay cut boards in first row and re-install 2nd and 3rd rows. Continue installation in manner described above. Put shims between floor and wall.

Step 12

If doorjamb (or similar) needs to be cut, use piece of board and piece of Combo Underlayment to obtain correct height. If new board must be tapped into place, be sure to protect edges with scrap of wood before tapping with handblock.

Step 13

Saw last board to correct width. Place last board on top of second-to-last board. Mark board with help of piece of board without locking edge. No board should be less than 3" in width (see Layout / Calculation Worksheet).

Step 14

Boards can be laid from all directions if necessary. Woodloc TM dismantles easily. This enables easier planning for difficult installation areas. If boards cannot be easily angled under door frame (or similar), do the following: cut away locking edge . Then apply Landobond TM Adhesive (sku 710225) and install board.

After Installation

• Remove expansion shims and use required Kährs moldings and/or trim pieces to cover expansion space. Always nail moldings to wall, never to flooring!

Clean Up

• Immediately clean any Landobond TM adhesive spilled on wood flooring during installation.

Maintenance

• Clean floor using dry dust mop or damp (lightly misted or well rung out) mop or cloth. Regularly use Kährs Wood Floor Cleaner for best results. Do not use oil soap or water-emulsion, self polishing waxes. NEVER wet mop floor. Place Peel & Stick Floor Protectors on furniture legs to prevent damage. See Kährs Lifetime Residential Guarantee for full details.

Float-In Installation for Traditional Tongue & Groove

NOTES:

• Kährs flooring is covered by a Lifetime Guarantee. However, Guarantee coverage may be lost due to failure to strictly follow all installation instructions and recommendations or the use of improper materials or tools. READ ALL INSTRUCTIONS CAREFULLY.

• Always begin a Kährs tongue & groove installation with the grooves facing the wall!

• Floating installation requires use of Kährs Approved Underlayment Systems. Refer to Underlayment section of this Guide.

• Proper expansion must be left at all walls and all vertical obstructions (e.g. fireplace, doorjambs, etc).

• For subfloor and environmental specifications, see Jobsite/Subfloor Preparation section.

IMPORTANT!

• Do not open packages until ready to begin installation! Inspect boards before installation. Kährs flooring is sealed at the factory with a 7% moisture content. Opening cartons to acclimate the flooring (as with some solid strip flooring) could result in a difficult installation.

• As an installer, it is your responsibility to be aware of the grade, Relative Humidity of the room, and moisture content of the subfloor. You should check that each plank is free of damage or manufacturing defects. Any unusable boards should be set aside for later replacement.

Prior to Installation

• See Jobsite/Subfloor Preparation section and follow all requirements before installation.

• Door casings should be notched or undercut to avoid difficult scribe cuts.

• Sweep or vacuum subfloor thoroughly.

• Floating installation requires use of Kährs Approved Underlayment Systems. Please refer to Jobsite/Underlayments, this Guide, for details.

Tools and Materials Required

• Tape Measure

• Chalk Line

• Last Board Puller

• Hammer

• Knocking Block

• Landobond TM Adhesive

• Expansion Shims

• Floor Protectors

• Kährs Router Bit

• Spline

For SKU numbers see Kährs Product Key in Tools & Techniques.

Step 1: First Row

1.1 Start with groove sides of board facing starting walls. If starting wall is not square or otherwise irregular, scribe first row, then cut boards to match variation in wall. Important: First row must be square to ensure true, fixed base from which to build entire floor.

1.2 Always leave appropriate expansion gap between boards and walls. See Layout/Required Expansion Ref. Chart. Use expansion shims spaced every 12" along all walls to help prevent avoidable movement during remainder of installation. Ensure at least one end joint is in each row, regardless of row width (e.g., hallways). Note: Installation of 14mm (9/16") flooring - open two or three cartons of flooring and "rack" (dry-lay) material prior to installation to ensure proper end joint stagger and usage of all four board lengths packaged in each carton.

1.3 Apply 1/8" bead of LandobondTM adhesive to upper inside of grooves on board. Note: Since first row boards lie against starting wall, only apply adhesive to board ends.

Step 2: Subsequent Rows

2.1 Start each subsequent row with cut off end of last board from previous row. Beginning at left, stagger end joints by minimum of 20" for Kährs 15mm flooring. For Kährs 14mm flooring use minimum 5" stagger, preferred 8".

2.2 Apply 1/8" bead of LandobondTM adhesive to inside of grooves on board.

2.3 Procedure for installing each board:

A) Set cut-off board from previous row as described in Step 2.1. Remember to allow for expansion gap and shim accordingly.

B) Engage new board at end joint only.

C) Starting at opposite end from engaged end joint, begin knocking length of board to engage groove with tongue of adjacent board.

D) If needed, use Last Board Puller or Knocking Block to reset end joint before completely engaging groove with tongue of adjacent board. Once long joints are engaged, it is virtually impossible to close end joints.

E) If gap exists at end joint after engaging long joint, work/wiggle board away from adjacent board to slightly open seam, then tap board end to close end joint.

2.4 Finish setting board by placing Knocking Block against tongue side and gently tapping board flush to previous row as shown in. Never tap groove side or top surface layer!

2.5 At end of row, cut board to appropriate length (allowing for expansion gap), apply adhesive and install as described above. If necessary, use Last Board Puller to gently pressure board into place as shown.

2.6 Check all seams for tight fit and move on to next row.

Changing Directions : If necessary to continue floor in reverse direction (e.g. through doorway), or away from groove, Kährs Spline Tongue must be used. Apply glue to groove and insert spline tongue, converting groove into tongue. Note : Kährs 14mm (9/16") flooring only: use Kährs Router Bit to re-cut groove, then insert spline. Board(s) to be installed adjacent must have grooves re-cut using Router Bit prior to engaging with routed/splined boards to ensure tight, level fit.

Step 3: Last Row

Since last row will generally not fit perfectly, scribe row as shown, remembering to allow adequate expansion gap. Engage all seams with Last Board Puller.

After Installation

• Remove expansion shims and use required Kährs moldings and/or trim pieces to cover expansion space. Always nail moldings to wall, never to flooring!

Clean Up

• Immediately clean any Landobond TM adhesive spilled on wood flooring during installation.

Maintenance

• Clean floor using dry dust mop or damp (lightly misted or well rung out) mop or cloth. Follow Kährs Commerical Flooring Maintenance Procedures. Do not use oil soap or water-emulsion, self polishing waxes. NEVER wet mop floor. Place Peel & Stick Floor Protectors on furniture legs to prevent damage. See Kährs Lifetime Residential Guarantee for full details.

Radiant Heat Applications, Float-In Only

NOTES:

• Kährs flooring is covered by a Lifetime Guarantee. However, Guarantee coverage may be lost due to failure to strictly follow all installation instructions and recommendations or the use of improper materials or tools.

READ ALL INSTRUCTIONS CAREFULLY.

• Beech and Maple expand and contract more than other species of wood. Thus, there is greater risk of gaps appearing in floor. This is NOT a manufacturing defect but should be taken into consideration when choosing these species for your Radiant Heated floor.

• Only Float-In installations are acceptable for Radiant Heat subfloors.

IMPORTANT!

• Do not open packages until ready to begin installation! Inspect boards before installation. Kährs flooring is sealed at the factory with a 7% moisture content. Opening cartons to acclimate the flooring (as with some solid strip flooring) could result in a difficult installation.

• As an installer, it is your responsibility to be aware of the grade, Relative Humidity of the room, and moisture content of the subfloor. You should check that each plank is free of damage or manufacturing defects. Any unusable boards should be set aside for later replacement.

Subfloor Specifications

• Surface of subfloor must be level to within 1/8" in an 8' radius.

• Concrete subfloors must not contain more than 2lbs. moisture on a dry-weight basis. Moisture content of wood subfloors should be between 6-10% moisture content.

• Subfloor must be clean.

Relative humidity at the job site must be, and remain, minimum 30%, maximum 60%. Temperature setting must be, and remain, within 15º F of normal operating range.

Jobsite Evaluation

• Before floating a Kährs floor over a radiant heat subfloor, inspect jobsite thoroughly. Lightweight-concrete and heating system must be laid correctly according to manufacturer's specifications.

• Before installing a Kährs floor over a Radiant Heat system, the following conditions must be met:

A) Moisture content of lightweight concrete subfloor must not exceed 2lbs. on a dry-weight basis at time of flooring installation (calcium chloride test).

B) Concrete must have been installed and cured at least four (4) weeks with no heat transference.

C) Heating system should then be run at 2/3 maximum output for minimum of two (2) weeks to allow any remaining moisture to evaporate, attaining its final moisture content without causing damage.

D) Three or four days before flooring installation, heating system must be reduced to suitable temperature (about 64º F or 18º C).

E) Subfloor level should not vary more than 1/8" in an 8ft. radius.

Preparation

Lightweight Concrete: To prepare concrete subfloor for installation, scrape any high spots.

Plywood : To prepare a plywood subfloor for float-in installation, re-nail any loose areas or areas with squeaks. Sand and/or plane any high spots and fill any low areas. Use caution not to damage radiant heating system.

Door casings should be notched or undercut to avoid difficult scribe cuts. Sweep or vacuum subfloor thoroughly.

Installation

Floating installations require use of Combo System Foam underlayment or Quietstride installed over 6 mil plastic. These products are warranty-approved or Radiant Heat installations. Please refer to Jobsite/Underlayments of this Guide for complete information.

If installing a Kährs Woodloc TM floor over Radiant Heat, please refer to Float-In Installation for Woodloc TM of this Guide and proceed from there.

If installing a Kährs Float-In Traditional Tongue & Groove, please refer to Float-In Installation of Traditional Tongue & Groove, page 19 of this Guide. Double gluing of grooves is required for Traditional Tongue & Groove! Double gluing increases the strength of the bond between boards by 90% over single gluing.

R-Value: Kährs Flooring

Kährs (14, 15mm) flooring = 1.15 R

QuietStride Underlayment = 0.40 R

Combo Foam Underlayment = .39 R

Linnea Woodloc TM (7.4mm) flooring = .34 R

Spirit Woodloc™ 10mm flooring = .56 R

Kährs Woodloc™ 14mm flooring = 0.80 R

After Installation

Beginning approximately two (2) days after installation is complete, gradually (over period of one week) raise temperature of heating system to its desired operating level. Surface temperature should never exceed 81º F (27º C) .

Glue-Down Installation of Woodloc

NOTE:

• Kährs flooring is covered by a Lifetime Guarantee. However, Guarantee coverage may be lost due to failure to strictly follow all installation instructions and recommendations or the use of improper materials or tools. READ ALL INSTRUCTIONS CAREFULLY.

IMPORTANT!

• Do not open packages until ready to begin installation! Inspect boards before installation. Kährs flooring is sealed at the factory with a 7% moisture content. Opening cartons to acclimate the flooring (as with some solid strip flooring) could result in a difficult installation.

• As an installer, it is your responsibility to be aware of the grade, Relative Humidity of the room, and moisture content of the subfloor. You should check that each plank is free of damage or manufacturing defects. Any unusable boards should be set aside for later replacement.

• Tip: Dry-lay first two rows to familiarize yourself with Woodloc TM .

Prior to Installation

• See Jobsite/Subfloor Preparation section and follow all requirements before installation.

• Door casings should be notched or undercut to avoid difficult scribe cuts.

• Sweep or vacuum subfloor thoroughly.

• Approved and recommended adhesives are Taylor 2071 Tuff Lok X-Link Wood Flooring Adhesive, Taylor MS, DriTac 7600, 7500, 7400, 9200, and Stauf SMP 940, WFR 930, PUM950. Apply adhesive directly to subfloor @ rate of 50 sq. ft. per gallon. Use manufacturer's recommended trowel. Note : Always wear rubber gloves when using adhesives!

*Optional adhesive: any moisture-cured urethane wood floor adhesive. For other approved adhesives call 1-800-ASK-KAHR.

Tools and Materials Required

• Tape Measure

• Chalk Line

• Hammer

• Last Board Puller

• Glue-Down Knocking Block

Taylor 2071 Tuff Lok X-Link Wood Flooring Adhesive, Taylor MS, DriTac 7600, 7500, 7400, 9200, and Stauf SMP 940, WFR 930, PUM950.

• Adhesive manufacturer's recommended trowel

• Expansion Shims

• Floor Protectors

• 100 lb. Roller

For SKU numbers see Kährs Product Key in Tools & Techniques, this Guide.

Tools & Techniques

Glue-Down Installation of Woodloc TM

Step 1: Layout

1.1 Using starting wall as reference, snap chalk line on subfloor 16-7/8" (425mm) from wall. Chalk line represents width of (2) Woodloc TM. boards, plus width of groove and required 1/2" expansion gap for perimeter walls. Note: expansion gap not necessary at interior obstructions, i.e., fireplaces.

1.2 Align straight edge (Kährs board or any solid material with straight edge) with chalk line and secure to subfloor.

1.3 Measure 1/2" from starting wall and snap another chalk line.

1.4 Spread adhesive in area between straight edge and second chalk line. Use only as much adhesive as can be used during open time of adhesive.

Step 2: Installation

2.1 Start in corner with tongue sides facing walls and long groove side directly up against straight edge. Lay board into adhesive. Remember to allow 1/2" expansion gap at wall.

2.2 Hold next board against first board at approximate 45º angle and lay flat on floor as shown. Continue in this manner for entire first row, allowing for 1/2" expansion gap. Insert shims at both ends.

2.3 Use cut off from first row to start second row. With groove side facing first row, hold board at approximate 45º angle and press inward, completely engaging long side joint. Ensure end joint stagger from row to row is a minimum of 20" for 14mm and 15mm and a minimum of 12" for 7mm and 10mm flooring.

2.4 Leave tongue side of board raised - DO NOT lay board flat into adhesive until all boards in row are fully engaged on long side.

2.5 Engage short end of next board as in Step 2.2. Lay long side in line with tongue of adjacent board in first row.

2.6 Since last row will generally not fit perfectly, scribe the row and cut to fit, allowing 1/4" (minimum) for expansion gap. Close seam tightly by pressing board against adjacent board. If necessary, use Last Board Puller (sku 710203) to assist with engagement. Continue until row is complete.

2.7 After first two rows are installed, ensure expansion gap between boards and walls are shimmed securely. If recommended by adhesive manufacturer, roll flooring with 100 lb. roller to ensure contact between flooring and subfloor. Place weight (e.g., unopened cartons) along perimeters until adhesive sets up. Remove straight edge.

Step 3: Subsequent Rows

3.1 Once starting rows are firmly in place, apply adhesive in a "wet lay" method. Do not apply more adhesive than can be used within open time of adhesive. Immediately place flooring in "wet" adhesive and proceed with installation.

3.2 Start each row with cut off end of last board from previous row.

3.3 DO NOT lay board flat into adhesive until all boards in row are fully engaged. To assist in engaging 14mm and 15mm boards, use Woodloc TM Glue-Down Knocking Block (sku 710281) to engage long joints, as shown in.

Tips:

• After first three rows are laid, have one installer work on installing flooring while others spread adhesive and cut boards as needed.

• Installation of 15mm Woodloc TM is easier while working on already installed flooring, as shown.

• Working in this manner lessens chance of accidentally transferring adhesive onto flooring surface, thereby reducing clean-up time.

• For doorway installation instructions, see Woodloc TM 15mm Float-In instructions.

After Installation

• Remove expansion shims and use required Kährs moldings and/or trim pieces to cover expansion space.

Clean Up

• Immediately clean any adhesive spilled on wood flooring during installation. Follow adhesive manufacturer's recommendations.

• Removal of cured adhesive from skin, tools, and equipment is difficult. Consult manufacturer for cleaning procedure. Tip: cover areas of trowel not used to spread adhesive with silver duct tape. After use, simply tear off tape and clean exposed areas with mineral spirits.

Curing

• Keep foot traffic to absolute minimum until adhesive is fully cured (follow mfg.'s recommendations).

• Wait at least 24 hrs. before placing furniture back in room and resuming normal traffic.

Maintenance

• Clean floor using dry dust mop or damp (lightly misted or well rung out) mop or cloth. Regularly use Kährs Wood Floor Cleaner for best results. Do not use oil soap or water-emulsion, self polishing waxes. NEVER wet mop floor. Place Steel-shank or Peel & Stick Floor Protectors on furniture legs to prevent damage. See Kährs Lifetime Residential Guarantee for full details (available at www.kahrs.com).
Glue-Down Installation of Traditional Tongue & Groove

Notes:

Kährs flooring is covered by a Lifetime Guarantee. However, Guarantee coverage may be lost due to failure to strictly follow all installation instructions and recommendations or the use of improper materials or tools. READ ALL INSTRUCTIONS CAREFULLY.

• For subfloor and environmental specifications and requirements, see Jobsite / Subfloor Preparation section.

• Kährs recommends Taylor 2071 Tuff Lok X-Link Wood Flooring Adhesive, Taylor MS, DriTac 7600, 7500, 7400, 9200, and Stauf SMP 940, WFR 930, PUM950. Use manufacturer's recommended trowel. For adhesive info please refer to Temp/Rel. Humidity Time Chart, Tools & Techniques section of this Guide.

• Alternative adhesives: any moisture-cured urethane wood flooring adhesive using recommended trowel. Note : Always wear rubber gloves when using adhesives!

• As last row generally will not fit perfectly, Kährs recommends dry-fitting first two rows and scribe if necessary.

Tools and Materials Required

• Tape Measure

• Chalk Line

• Hammer

• Last Board Puller

• Glue-Down Knocking Block

• Recommended Adhesive (see above)

• Straight Edge

• Adhesive mfg.'s recommended trowel

• Expansion Shims

• Floor Protectors

• 100 lb. Roller

For SKU numbers see Kährs Product Key in Tools & Techniques.

Step 1: Layout

1.1 Using staring wall as reference, snap a chalk line on the subfloor. Chalk line represents width of (2) Trad. T & G boards, plus width of tongue, and required 1/2" expansion gap required for perimeter walls. Note: expansion gap not necessary at interior obstructions, i.e. fireplaces.

1.2 Align straight edge with chalk line and secure to subfloor.

1.3 Measure 1/2" from starting wall and snap another chalk line. Note: Installation of 14mm (9/16") flooring - open two or three cartons of flooring and "rack" (dry-lay) material prior to installation to ensure proper end joint stagger and usage of all four board lengths packaged in each carton.

1.4 Spread adhesive in area between straight edge and second chalk line. Use only as much adhesive as can be used during open time of adhesive.

Step 2: Installation

2.1 Starting in corner, with grooved sides facing starting wall and long tongue side directly up against straight edge, lay board into adhesive. Remember to allow 1/2" expansion gap at wall.

2.2 Apply Landobond TM adhesive (sku 710225) to top and bottom inside edge of end joint groove of next board. Lay board against straight edge and approx. 1/8" away from end of first board. Engage end joints using Last Board Puller. Continue in this manner for entire row. Remember to leave 1/2" expansion gap at end of row and shim at both ends.
2.3 Use cut off from first row to start second row (Fig. 2.3). With tongue side facing first row, fully engage boards using Last Board Puller. Ensure end joint stagger from row to row is a minimum of 20" for 15mm flooring. For 14mm flooring, preferred stagger is 8" with a minimum of 5".

2.4 Apply Landobond TM adhesive to end joint of next board (double-glued). Engage board to floor at end joint only. Starting at opposite end of locked end joint, use Last Board Puller to knock along length of board to engage tongue on long side with groove of adjacent board. Use Last Board Puller to reset end joint if necessary. Once long seams are set, it is virtually impossible to close end seams.

2.5 After first two rows are installed, ensure expansion gap between boards and walls are shimmed securely. If recommended by adhesive manufacturer, roll flooring with 100 lb. roller to ensure contact between flooring and subfloor. Place weight (e.g., unopened cartons) along perimeters until adhesive sets up. Remove straight edge.

Step 3: Subsequent Rows

3.1 Once starting rows are firmly in place, apply adhesive in a "wet lay" method. Do not apply more adhesive than can be used within open time of adhesive. Immediately place flooring in "wet" adhesive and proceed with installation.

3.2 Start each row with cut off end of last board from previous row maintaining a minimum of 20" for 15mm flooring. For 14mm flooring, preferred stagger is 8" with a minimum of 5".

3.3 Engage second board in third row, and subsequent boards, as described in Step 2.4. Use Glue-Down Knocking Block (sku 710281) or Last Board Puller to engage boards.

Tip:

• After first three rows are laid, have one installer work on laying flooring while others spread adhesive and cut boards as needed.

After Installation

• Remove expansion shims and install required Kährs moldings and/or trim pieces to cover expansion gaps. Always nail moldings to wall, never to flooring.

Clean Up

• Immediately clean any adhesive spilled on wood flooring during installation. Follow adhesive manufacturer's recommendations.

• Removal of cured adhesive from skin, tools, and equipment is difficult. Consult manufacturer for cleaning procedure. Tip: cover areas of trowel not used to spread adhesive with silver duct tape. After use, simply tear off tape and clean exposed areas with mineral spirits.

Curing

• Keep foot traffic to absolute minimum until adhesive is fully cured (follow manufacturer's recommendations.)

• Wait at least 24 hours before placing furniture back in room and resuming normal traffic.

Maintenance

• Clean floor using dry dust mop or damp (lightly misted or well rung out) mop or cloth. Regularly use Kährs Wood Floor Cleaner for best results. Do not use oil soap or water-emulsion, self polishing waxes. NEVER wet mop floor. Place Peel & Stick Floor Protectors on furniture legs to prevent damage. See Kährs Lifetime Residential Guarantee for full details (available at www.kahrs.com).

Glue-Down Installation of Studio TM & Mega Studio TM , 11mm

NOTE:

Kährs flooring is covered by a Lifetime Guarantee. However, Guarantee coverage may be lost due to failure to strictly follow all installation instructions and recommendations or the use of improper materials or tools. READ ALL INSTRUCTIONS CAREFULLY.

IMPORTANT!

• Do not open packages until ready to begin installation! Inspect boards as you go. Kährs flooring is sealed at the factory with a 7% moisture content. Opening cartons to acclimate the flooring (as with some solid strip flooring) could result in a difficult installation.

• As an installer, it is your responsibility to be aware of the grade, Relative Humidity of the room, and moisture content of the subfloor. You should check that each plank is free of damage or manufacturing defects. Any unusable boards should be set aside for later replacement.

Prior to Installation

• See Jobsite/Subfloor Preparation section and follow all requirements before installation.

• Door casings should be notched or undercut to avoid difficult scribe cuts.

• Sweep or vacuum subfloor thoroughly.

• Approved and recommended adhesives are Taylor 2071 Tuff Lok X-Link Wood Flooring Adhesive, Taylor MS, DriTac 7600, 7500, 7400, 9200, and Stauf SMP 940, WFR 930, PUM950. Apply adhesive directly to subfloor @ rate of 50 sq. ft. per gallon. Use manufacturer's recommended trowel Note : Always wear rubber gloves when using adhesives!

• Optional adhesive: any moisture-cured urethane wood floor adhesive. For other approved adhesives call 1-800-ASK-KAHR.

Tools and Materials Required

• Recommended Adhesive (see above)

• Adhesive mfg.'s recommended trowel

• Tape Measure

• Chalk Line

• Straight Edge

• Expansion Shims

• Floor Protectors

For SKU numbers see Kährs Product Key in Tools & Techniques, page 12.

Step 1: Layout

1.1 Using starting wall as reference, snap chalk line on subfloor at distance of 4 - 6 times width of boards (depending on reach of installer), plus additional 1/4" (minimum) for expansion gap. Note: expansion gap not necessary at interior obstructions, i.e. fireplaces.

1.2 Align straight edge (can be plywood or any solid material with STRAIGHT edge) with chalk line and secure to floor.

1.3 Spread only as much adhesive as can be used during open time of adhesive.

Important Installation Notes:

• Kährs Studio Flooring comes with an equal number of "left-handed" and "right-handed" boards. When installing, an entire row must be installed using all "right-handed" or all "left-handed" boards.

• Mega Studio includes only "right-handed" boards.

• Studio and Mega Studio Flooring cartons contain several "shorts". Use these boards at perimeter walls.

• Place weight along walls and doorways after installation for several hours to ensure proper adhesion.

Step 2: Installation

2.1 Install flooring with tongue side facing starting wall. Begin by installing first row directly against straight edge.

2.2 Install subsequent rows, working toward starting wall. Place each board into adhesive at slight diagonal to first row, approx. 1/8" from final position, and push by hand to engage groove and tongue.

2.3 Stagger end joints from row to row - Studio-2-3/4" (min.) stagger, Mega Studio- 4" (min.) stagger.

2.4 Check for tight fit on end joint of each board and wedge expansion shims at end of each row and at starting wall to help prevent movement during remainder of installation.

2.5 Once first rows are installed, a 1/4" (min.) expansion gap should remain between last row installed and starting wall. Allow first rows to set up firmly, then remove straight edge.

Step 3: Subsequent Rows

3.1 Once starting rows are firmly in place, apply adhesive in a "wet lay" method. Immediately place flooring in "wet" adhesive and proceed with installation.

3.2 If recommended by adhesive manufacturer, roll floor with a 100lb. roller to ensure contact between flooring and subfloor.

3.3 Place weight (i.e. unopened cartons) at starting and perimeter walls during installation until adhesive sets up.

3.4 Start each row with cut off end of last board from previous row.

3.5 At end of each row, cut excess length and use at beginning of next row.

Step 4: Last Row

Since last row will generally not fit perfectly, scribe the row and cut to fit, allowing 1/4" (minimum) for expansion gap.

After Installation

• Remove expansion shims and use required Kährs moldings and/or trim pieces to cover expansion space.

Clean Up

• Immediately clean any adhesive spilled on wood flooring during installation. Follow adhesive manufacturer's recommendations.

• Removal of cured adhesive from skin, tools, and equipment is difficult. Consult manufacturer for cleaning procedure. Tip: cover areas of trowel not used to spread adhesive with silver duct tape. After use, simply tear off tape and clean exposed areas with mineral spirits.

Curing

• Keep foot traffic to absolute minimum until adhesive is fully cured (follow manufacturer's recommendations).

• Wait at least 24 hours before placing furniture back in room and resuming normal traffic.

Maintenance

• Clean floor using dry dust mop or damp (lightly misted or well rung out) mop or cloth. Regularly use Kährs Wood Floor Cleaner for best results. Do not use oil soap or water-emulsion, self polishing waxes. NEVER wet mop floor. Place Steel-shank or Peel & Stick Floor Protectors on furniture legs to prevent damage. See Kährs Lifetime Residential Guarantee for full details (available at www.kahrs.com).

Herringbone Installation of Studio , 11mm

NOTE:

• Kährs flooring is covered by a Lifetime Guarantee. However, Guarantee coverage may be lost due to failure to strictly follow all installation instructions and recommendations or the use of improper materials or tools. READ ALL INSTRUCTIONS CAREFULLY.

IMPORTANT!

• Do not open packages until ready to begin installation! Inspect boards before installation. Kährs flooring is sealed at the factory with a 7% moisture content. Opening cartons to acclimate the flooring (as with some solid strip flooring) could result in a difficult installation.

• As an installer, it is your responsibility to be aware of the grade, Relative Humidity of the room, and moisture content of the subfloor. You should check that each plank is free of damage or manufacturing defects. Any unusable boards should be set aside for later replacement.

Prior to Installation

• See Jobsite/Subfloor Preparation section and follow all requirements before installation.

• Door casings should be notched or undercut to avoid difficult scribe cuts.

• Sweep or vacuum subfloor thoroughly.

• Approved and recommended adhesive is Taylor 2071 Tuff Lok X-Link Wood Flooring Adhesive, Taylor MS, DriTac 7600, 7500, 7400, 9200, and Stauf SMP 940, WFR 930, PUM950. Apply adhesive directly to subfloor @ rate of 50 sq. ft. per gallon. Use manufacturer's recommended trowel. Note : Always wear rubber gloves when using adhesives!

*Optional adhesive: any moisture-cured urethane-based wood floor adhesive. For other approved adhesives call 1-800-ASK-KAHR.

• Strip flooring is packaged with an equal number of "left-handed" and "right-handed" boards and must be separated prior to installation.

• See Tool List on next page for required tools.

Important Installation Notes:

• Herringbone (or other patterned floors) can only be installed using Kährs Studio (2-3/4" x 18-1/2").

• Measurement accuracy is critical for successful installation.

• Subfloor preparation is critical. Please see Jobsite/Subfloor Preparation for all requirements.

Tools and Materials Required

Taylor 2071 Tuff Lok X-Link Wood Flooring Adhesive, Taylor MS, DriTac 7600, 7500, 7400, 9200, and Stauf SMP 940, WFR 930, PUM950.

Adhesive mfg.'s recommended trowel

• Tape Measure

• Chalk Line