Installing hardwood over a concrete slab is a common procedure, but it requires strict adherence to moisture management protocols. Concrete is porous and can hold significant moisture, which can cause solid hardwood to cup, buckle, or crown if not properly addressed. Before any installation begins, the subfloor must be tested. We look for compliance with the manufacturer's MVER (Moisture Vapor Emission Rate) limits using calcium chloride tests or in-situ relative humidity (RH) probes to ensure the slab is sufficiently dry. Once moisture levels are confirmed to be within safe parameters, you have several options for installation. Engineered hardwood is often the preferred choice for slabs because of its dimensional stability. If you choose solid hardwood, it must be installed using specific systems approved for concrete, such as a glue-down application with a moisture-retardant adhesive or a floating system with a high-quality vapor barrier. Following these NWFA-recommended practices ensures the longevity of your floor and protects your warranty against moisture-related failure.
Key considerations
- hardwood over concrete
- moisture test for slab
- engineered hardwood on concrete
- Engineered
- Moisture Barrier
- Concrete Subfloor