A concrete slab does not automatically rule out engineered hardwood. The specific board, adhesive or underlayment system, and slab condition determine whether a proposed installation is appropriate.
Start with the flooring instructions
Confirm that the exact engineered product is approved over concrete and at the relevant level of the building. Installation requirements differ between product lines.
Test and prepare the slab
The NWFA guidelines call for moisture evaluation and a sound, flat substrate. A known moisture condition should be resolved before a wood floor or underlayment covers it.
Choose the complete method
Glue-down and floating assemblies have different materials and details. Adhesive, vapor control, underlayment, transitions, and perimeter treatment should be planned as one compatible system.
A practical checklist
- Confirm concrete approval for the chosen board.
- Document slab condition and moisture results.
- Match adhesive or underlayment to the exact system.
Can solid hardwood be floated over a slab?
The NWFA generally limits floating wood installations to engineered products unless a manufacturer explicitly recommends and warrants an exception.
General planning information. Site conditions and the selected manufacturer's instructions determine the installation details.