Building A Subfloor Over Concrete

How to install a plywood subfloor on a concrete slab floated subfloor system.

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. One of the simplest options is a sleeper based subfloor. There are several subfloor installation methods each with its own guidelines including. The national wood flooring association issues guidelines for installing wood subfloor over concrete.

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. To begin you ll need two layers of 3 8 inch minimum cd exposure 1 plywood subfloor panels. Duraamen s param 5500 goes on thin in a 3 8 to 1 2 thick application. 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.

You need a dry clean and flat surface before you can install finished flooring in a room built on a concrete slab. Follow these installation guidelines when installing a wood subfloor. Subfloors are strong versatile and very durable. The result is a subfloor that protects finished flooring from cold and damp concrete based floors.