Plywood Over Concrete For Hardwood

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.

Plywood over concrete for hardwood.

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. Don t glue the plywood to the concrete. Alternatively screw rows of treated 1x4s to the concrete 16 in. Most subfloors over concrete use exterior grade plywood or osb oriented strand board.

Float this is when the hardwood is clicked into each other or glued at joints but is not attached to the floor. Install the plywood after the vapor retarder is in place. Solid hardwood can not be glued except for bamboo 3. Lay 6 mil polyethylene sheeting over the concrete to minimize moisture migration from the concrete up into the wood flooring.

Before hardwood flooring is installed over concrete a plywood subfloor must be installed. Once you ve installed a vapor retarder install your subfloor. A moisture control membrane is recommended any time a wood subfloor is installed over concrete. To install a floated subfloor system first place a layer of plywood subfloor panels with the edges parallel to the wall.

Get a comprehensive breakdown on which materials to use what to take into consideration and what steps to take for four subfloor systems. Not all subfloors are the same. 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. Concrete has moisture in it and your wood will mold and rot over time.

Installation over concrete with a calcium carbide reading of greater than 2 5 percent. Glue down engineered hardwoods can be glued note. Treated plywood to the concrete with concrete screws spaced every 16 in. Learn how to install beautiful hardwood floors over a concrete slab.

I don t remember what it is called but it comes in a roll 6 ft by 50 ft. The floor is secured via the base molding around the edges. Floated subfloor alternate subfloor glue down sub floor and the nail down subfloor system. There is a product you can buy from your local home depot store for putting under a floor over concrete.

Cut plywood to fit within 1 8 near door jambs and other obstructions where finish trim will not be used.