Product Suitability:
Karndean Tile & Plank is suitable for all interior floor surfaces, above, on or below grade, and over concrete or wood sub-floors. Also, when used conjunction with the K-91 adhesive, it is suitable for installation over existing vinyl floors. Subfloor reparation and installation procedures must conform to RFCI specification IS-2.
Testing and Acclimatizing:
It is essential to conduct a calcium chloride test (moisture test) on all concrete floors. The test should be conducted around the perimeter of the room, at columns, and where moisture may be evident. The moisture emissions from the concrete when using KNA322 should not exceed 3.0 lbs. per 1000 square feet in 24 hours and when using K-91 should not exceed 5.0 lbs. per 1000 square feet in 24 hours. This is RFCI Regulation.
During this preliminary moisture testing period, Karndean Tile & Plank should be present at the job site to allow an appropriate period for the product to acclimatize. This is very important: not doing this can result in expansion/contraction of plank.
If the concrete exceeds moisture limitations, the installation should not proceed until the problem is corrected. A moisture problem can be corrected by sealing the concrete with any one of the many brands of concrete sealers available. After the sealer has been applied, re-test to ensure that the problem has been corrected. It is essential that the correct adhesive is used as the sub-floor can change from porous to non-porous when using a sealer. It is important to note that a moisture test indicates conditions at the time of testing only. The flooring contractor cannot be held responsible if the moisture appears in the future, causing adhesive failure.
Please note that new concrete sub-floors contain a high percentage of moisture and must be allowed to dry out. Industry standard is 90 day dry out time. The drying time will depend on several conditions, such as the type of concrete used, average air temperature and thickness and location of the slab.
Sub-floor Preparation:
Underlayment panels are used to correct deficiencies in the subfloor and to provide a smooth, sound surface on which to adhere Karndean Tile and Planks. There are numerous suitable underlayment panels, such as Structurwood, Tech Ply, Accu Ply, 6 Ply Birch.
Multiply High Grade and Masonite brand underlayments, the most common of which is 1/4' APA underlayment grade plywood. Particle board, strand board and flake board are not RFCI-recom-mended underlayments, and therefore are not recommended for use as a subfloor to Karndean flooring.
Always fasten underlayment panels in accordance with the manufacturer's recommendations as any failure of the underlayment or Karndean flooring product as a result of the underlayments is the responsibility of the underlayment manufacturer. Suitable underlayment with a fully sanded surface and a minimum thickness of 1/4" is preferred. The sub-floor must be free of any foreign material, such as dust, grease, oil, polish, loose material or any other separating agents that may cause staining, telegraphing or adhesive failure.
Concrete sub-floors are also suitable provided the concrete's moisture content is within the specified parameters.
Seams, cracks, indentations and other sub-floor irregularities should be patched using a Portland based patching compound or leveler. Other types of levelers, such as calcium sulfate/plaster/gypsum based compounds are not recommended, as they may harbor and promote mildew growth, provide low indentation resistance and offer poor bond and adhesion strength.
When installed with the K91 adhesive, Karndean Tile and Plank may be installed over a single layer of non-cushioned resilient flooring, provided the following conditions have been met:
- the existing flooring must be fully adhered and well-bonded;
- the subfloor or underlayment that is under the existing resilient floor must meet the requirements of the existing floor and the Karndean floor;
- any waxes or finishes must be completely removed and rinsed with clean water; and
- any cuts, gouges, dents or other irregularities in the existing floor and any existing embossing or texture must be leveled to prevent telegraphing; with a Portland base skim coat.
- if existing floor has been installed over concrete, on or below grade, one calcium chloride moisture test must be performed for every 1000 square feet. The results of the test must meet the requirements of both the existing floor and the Karndean floor. Moisture tests should be conducted over an area where the existing floor and adhesive has been completely removed.
Installation:
Use KNA322 Adhesive when applying Karndean Tile & Plank over porous subfloors, such as concrete or wood. All plank installation must be wet-set. Spread the adhesive in small sections with an l/16" x l/16" x l/16" V-notched trowel. Each section must be no larger an area than can be covered with flooring in approxi-mately 20 minutes.
Allow a few minutes open time for the adhesive to tack up, and then install flooring immediately before it skins over or dries. The adhesive working time is approximately 20 minutes under normal conditions. Position the plank or tile firmly in the adhesive without sliding. Periodically check to make sure that at least 95% of the adhesive pattern has been transferred to the back of the plank or tile. If adhesive starts to set up or skins over scrape it up and reapply fresh adhesive. Roll each section immediately upon completing with a minimum 100-lb. three-section roller. Re-roll the entire area after one or two hours. Do not wash or polish the floor for a minimum of 48 hours after installation.
Use K-91 Adhesive when applying Karndean Tile & Plank over porous subfloors, such as concrete or wood, and non-porous floors, such as existing vinyl floors.
For installation over porous surfaces, adhesive may be used either wet or as a pressure sensitive adhesive. To use wet, apply adhesive with the recommended trowel, see side of adhesive pail, and allow to flash-off for 5 to 10 minutes before installing flooring. Lay tile or plank into wet adhesive. Adhesive must transfer 100% to floor product to ensure proper bond. To use as a pressure sensitive adhesive, allow drying to a tacky state and then install flooring within 3 hours. Within 30 minutes after installation is complete, roll and cross roll entire floor with a 100 pound sectional roller. Use hand roller in areas which cannot be reached with larger roller. Check 1 to 2 hours after installing flooring material and roll again if necessary.
For installation over non-porous surfaces, apply adhesive with the recommended trowel, see side of adhesive pail, and allow to dry completely from yellow to tan and lay in the tile or plank within 3 hours. The highly aggressive pressure sensitive grip prevents slippage and minimizes seam gaps. Drying time is 45 to 90 minutes and will vary due to installation site temperature and humidity. Installation over areas of incomplete drying can result in job failure. Within 30 minutes after installation is complete, roll and cross roll entire floor with a 100 pound sectional roller. Use hand roller in areas which cannot be reached with larger roller. Check 1 to 2 hours after installing flooring material and roll again if necessary.
Use K-92 Adhesive one part epoxy when applying Karndean Tile & Plank over porous subfloors, such as concrete or wood, and non-porous floors, such as existing vinyl floors.
For installation over porous surfaces, apply adhesive with the recommended trowel, see side of adhesive pail. Install flooring into wet adhesive. Adhesive must transfer 100% to back of flooring to ensure proper bond. Do not spread more adhesive than can be laid into within 30 minutes. Open time is approximately, depending upon installation site temperature, humidity, and porosity of the subfloor. Within 30 minutes after installation is complete, roll and cross roll entire floor with a 100 pound sectional roller. Use hand roller in areas which cannot be reached with larger roller. Check 1 to 2 hours after installing flooring material and roll again if necessary.
For installation over non-porous surfaces, apply adhesive with the recommended trowel, see side of adhesive pail, and allow adhesive to flash off for 15 minutes. Open time will depend upon installation site temperature and humidity. Adhesive must transfer 100% to back of flooring to ensure proper bond. Within 30 minutes after installation is complete, roll and cross roll entire floor with a 100 pound sectional roller. Use hand roller in areas which cannot be reached with larger roller. Check 1 to 2 hours after installing flooring material and roll again if necessary.
Download the Karndean Vinyl Installation Guide