Sub Floor Framing Over Cement Slab

Local and national codes contain specific requirements for framed floors and you should consult your local building department before beginning this project.

Sub floor framing over cement slab.

Use a digital moisture detector to measure the moisture content mc of the concrete slab. An illustrated look at how a typical wood frame floor is built including sublooring and more. The procedure for installing a floor structure over a slab with 2 by 6 joists can be adapted to larger joist sizes if more subfloor space is required. If the subfloor doesn t have enough stability you can usually but not always remedy the situation by installing cement backer board also called cementboard.

Installing a floating subfloor over your cement floor can add warmth homeliness and character to your room. Get a comprehensive breakdown on which materials to use what to take into consideration and what steps to take for four subfloor systems. Alternatively screw rows of treated 1x4s to the concrete 16 in. Treated plywood to the concrete with concrete screws spaced every 16 in.

Floated subfloor alternate subfloor glue down sub floor and the nail down subfloor system. Lay 6 mil polyethylene sheeting over the concrete to minimize moisture migration from the concrete up into the wood flooring. The subfloor is the foundation beneath finish flooring materials. Raised floors are more resilient under foot and provide access for heating equipment insulation plumbing wiring and other mechanical.

On wood frame floors the subflooring provides a continuous structural surface over the floor joists. You can create a floor that is appealing and that will act a barrier between the cold cement and your interior. Follow the steps below to begin preparations for this process. Check your local building code and pay special attention to rules concerning vapor barriers span ratings subfloor thickness and floor drains.

When installing a ceramic tile floor on a concrete subfloor you don t have to worry about flexing as long as the concrete slab is at least 1 1 8 inch thick which most slabs are.