Do Carpet Tiles Stick to a Concrete Floor?

Carpet Tiles and Basements

• It's best to avoid installing carpet tiles in a basement, unless the concrete flooring is properly insulated and heated. According to the Minnesota Department of Commerce Energy Information Center, unfinished concrete allows moisture to form beneath the tiles, creating the perfect environment for mold and mildew.

Testing Concrete

• The best way to determine whether carpet tiles will properly adhere to concrete is to test the moisture levels beforehand. Several factors affect moisture levels, such as humidity, room temperature and airflow from heating and cooling systems. To get the most accurate test results, the room should be tested while it's closest to normal temperature and humidity ranges, according to ConcreteConstruction.net. While there are several tests available, you should utilize those specified by the carpet tile manufacturer, in order to protect your warranty. The Mohawk Group, for example, requires both moisture and pH testing to determine whether their products will properly adhere to the concrete. Most manufacturers require a moisture transmission rate of no more than 3 to 5 pounds per 1000 square feet and a pH reading of 9 or less, depending on the product. Contact your flooring distributor for more information on concrete testing providers in your area.

Concrete Floor Condition

• The surface of the concrete needs to be smooth, level and clean in order for carpet tiles to remain in place. Any cracks or holes should be filled in with patching compound. If the floor is not level, use a leveling compound to create an even surface. A surface, such as a garage floor, may not be completely flat if it was designed to allow for water run-off. Most manufacturers recommend the use of a smoothing compound or a primer to create a completely smooth surface. Any treatments should be allowed to dry completely before attempting to install carpet tiles. Always follow the manufacturer's recommendations to ensure that concrete smoothing treatments will be compatible with their carpet tile adhesives. After all smoothing treatments have dried, remove all dust and debris from the flooring surface. If you have to mop the room, allow another 24 to 48 hours for the surface to dry completely.

Preparing for Carpet Tile Installation

• Cold floor temperatures and humidity levels over 65 percent adversely affect carpet tile adhesive. The Mohawk Group advises that the concrete floor must be kept at a temperature between 65 and 90 degrees Fahrenheit for 72 hours prior to installing the tiles and at least 48 hours afterward. Bring boxes of carpet tiles indoors to rest and acclimate. Keep them in a room with temperatures between 60 and 85 degrees Fahrenheit for at least two days before installation. Before you begin installing, make certain to use only those adhesive products and tools recommended by the carpet tile manufacturer, to protect your warranty and ensure proper adhesion to the concrete.