Building A Subfloor Over Concrete

You need a dry clean and flat surface before you can install finished flooring in a room built on a concrete slab.

Building a subfloor over concrete.

Use a minimum 3 4 inch cd exposure 1 plywood sheathing 4 foot by 8 foot sheets. To begin you ll need two layers of 3 8 inch minimum cd exposure 1 plywood subfloor panels. When the adhesive requires add a moisture control system before applying the adhesive. Additionally the underlayment is always a waterproof material that will create a waterproof barrier.

How to install a plywood subfloor on a concrete slab floated subfloor system. One of the simplest options is a sleeper based subfloor. 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. Subfloors are strong versatile and very durable.

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. 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. The national wood flooring association issues guidelines for installing wood subfloor over concrete. Duraamen s param 5500 goes on thin in a 3 8 to 1 2 thick application.