Building A Subfloor Over Concrete

Follow these installation guidelines when installing a wood subfloor.

Building a subfloor over concrete.

When direct gluing a wood subfloor over concrete follow the adhesive manufacturer s recommendation for moisture requirements and limitations type of adhesive application method trowel notch type and spread rates. Use a minimum 3 4 inch cd exposure 1 plywood sheathing 4 foot by 8 foot sheets. Subfloors are strong versatile and very durable. How to install a plywood subfloor on a concrete slab floated subfloor system.

The national wood flooring association issues guidelines for installing wood subfloor over concrete. To begin you ll need two layers of 3 8 inch minimum cd exposure 1 plywood subfloor panels. When installed correctly your concrete over plywood floor will not permit moisture through will not warp or buckle and will come with all the benefits of concrete in an easy to care for floor. The result is a subfloor that protects finished flooring from cold and damp concrete based floors.

The underlayment exists to create an air filled gap between the concrete below and the subflooring which will help to insulate the floor and keep the room warmer. Duraamen s param 5500 goes on thin in a 3 8 to 1 2 thick application. One of the simplest options is a sleeper based subfloor. Additionally the underlayment is always a waterproof material that will create a waterproof barrier.