Subfloor For Engineered Hardwood Over Concrete

If necessary add vapor retarder before applying underlayment especially recommended if 3 4 inch wood flooring is installed over concrete.

Subfloor for engineered hardwood over concrete.

If the slab is out of specification consider grinding floating or both. The concrete subfloor must be sufficiently strong to safely support the flooring furniture and people in the room. Check for cracks and crumbling. The nwfa recommends plywood with a minimal thickness of.

Typically manufacturers will specify a flatness tolerance of 1 8 in a 6 foot radius and or 3 16 in a 10 foot radius. Wood needs to move as the humidity increases and decreases throughout the year. Consult the product data sheet for instructions regarding specific trowel requirements. If the wood can t expand sideways it will twist warp or cup as it absorbs moisture.

As with a floated subfloor nwfa recommends a vapor retarder for glue down subfloors when installing wood flooring over concrete. How to install engineered wood over concrete engineered wood flooring offers the timeless look of hardwood but is perfect for basements and other areas where moisture can be an issue. In general use a notched trowel to spread the adhesive. If you have a subfloor that consists of wood on top of concrete you ll need to test both floors.

A moisture control membrane is recommended any time a wood subfloor is installed over concrete. Wood floor over concrete than over a wood subfloor. Follow these steps to install an engineered wood floor in your home. But it s considerably more difficult to install a 3 4 in.

In this case the subfloor is the concrete slab. After installing a vapor retarder if necessary cut your plywood panels into 2 x8 or 4 x4 sections. The subfloor is the foundation beneath finish flooring materials. Nail down subfloor system get 3 4 inch minimum cd exposure 1 plywood subfloor panels 4 foot by 8 foot sheets.

Although you can attach hardwood directly to concrete with glue or nails it s not advisable. In on grade and below grade installations moisture control systems are always recommended and required when calcium chloride readings are greater than three pounds or when relative humidity readings are greater than 75 percent. Subfloor must be flat. Installing engineered hardwood flooring over concrete too tight against a stationary object will not allow room for normal expansion and may cause a failure.

You ll first have to install 3 4 in. Make sure the concrete slab is flat to the wood flooring manufacturer s specification.