Sub Floor Framing Over Cement Slab

You can create a floor that is appealing and that will act a barrier between the cold cement and your interior.

Sub floor framing over cement slab.

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. In basements and in homes with slab on grade foundations the subfloor may simply be a 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.

Use a digital moisture detector to measure the moisture content mc of the concrete slab. Installing a floating subfloor over your cement floor can add warmth homeliness and character to your room. The subfloor is the foundation beneath finish flooring materials. Lay 6 mil polyethylene sheeting over the concrete to minimize moisture migration from the concrete up into the wood flooring.

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. Treated plywood to the concrete with concrete screws spaced every 16 in. Get a comprehensive breakdown on which materials to use what to take into consideration and what steps to take for four subfloor systems. Floated subfloor alternate subfloor glue down sub floor and the nail down subfloor system.

Alternatively screw rows of treated 1x4s to the concrete 16 in. Check your local building code and pay special attention to rules concerning vapor barriers span ratings subfloor thickness and floor drains. Follow the steps below to begin preparations for this process. Though some floors are built on a concrete slab flat on the ground most floors are raised above the ground.

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