Plywood Over Concrete For Hardwood

Lay 6 mil polyethylene sheeting over the concrete to minimize moisture migration from the concrete up into the wood flooring.

Plywood over concrete for hardwood. Concrete has moisture in it and your wood will mold and rot over time. Learn how to install beautiful hardwood floors over a concrete slab. Cut plywood to fit within 1 8 near door jambs and other obstructions where finish trim will not be used. 1 nail down requires plywood sub flloor you can t nail into concrete last i checked 2.

A moisture control membrane is recommended any time a wood subfloor is installed over concrete. Float this is when the hardwood is clicked into each other or glued at joints but is not attached to the floor. Floated subfloor alternate subfloor glue down sub floor and the nail down subfloor system. Don t glue the plywood to the concrete.

Glue down engineered hardwoods can be glued note. Get a comprehensive breakdown on which materials to use what to take into consideration and what steps to take for four subfloor systems. Solid hardwood can not be glued except for bamboo 3. Often when we talk of subflooring people think of lauan plywood which is used as subflooring over thicker plywood in preparation for installing a vinyl floor.

Before hardwood flooring is installed over concrete a plywood subfloor must be installed. Install the plywood after the vapor retarder is in place. Do not use pressure treated plywood unless it has been kiln dried after treatment kdat and moisture content coincides with the in use environment of the facility in which the flooring is being installed. Loosely lay a nailing surface of 3 4 4 x 8 exterior plywood panels over the entire area leaving a 3 4 space at the wall line and 1 4 to 1 2 between panels.

It lays directly on top of the waterproof barrier or combination of barrier and underlayment to help cushion and insulate. Alternatively screw rows of treated 1x4s to the concrete 16 in. Not all subfloors are the same. It looks like a sheet of dimples or very large bubble wrap.

The floor is secured via the base molding around the edges. Installation over concrete with a calcium carbide reading of greater than 2 5 percent. Most subfloors over concrete use exterior grade plywood or osb oriented strand board. Treated plywood to the concrete with concrete screws spaced every 16 in.

I don t remember what it is called but it comes in a roll 6 ft by 50 ft.