2 Inch Concrete Slab Over Wood Subfloor

We are hearing a lot of concerns from concrete contractors about pouring that thin.

2 inch concrete slab over wood subfloor. Nail down subfloor system get 3 4 inch minimum cd exposure 1 plywood subfloor panels 4 foot by 8 foot sheets. If necessary add vapor retarder before applying underlayment especially recommended if 3 4 inch wood flooring is installed over concrete. We recommend applying param 5500 at a minimum thickness of 3 8 1 2 is preferred to. The installation of calcium aluminate cement based self leveling concrete param 5500 along with expanded metal lath for reinforcement is a successful fast track method to convert a plywood subfloor into a beautiful concrete floor.

If there are cracks larger than 1 8 inch in your concrete subfloor those should be patched and filled with a cement patching compound. To prevent that movement from creating cracks in your grout and tile install a crack prevention membrane after the concrete subfloor is clean flat and free. Engineered or solid strip flooring less than 1 2 inch thick and parquet flooring may need an additional 3 8 inch layer of plywood installed over these types of subfloors. We are planning to lay 2x4 s on their sides 24 inches on center.

In basements and in homes with slab on grade foundations the subfloor may simply be a concrete slab. Plywood substrate in a kitchen. 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. On wood frame floors the subflooring provides a continuous structural surface over the floor joists.

Metal lath stapled over plywood substrate. The subfloor is the foundation beneath finish flooring materials. Does anyone out there have any information about how we can do a finished concrete floor on a plywood subfl. If the subfloor is not acceptable it can often be overlaid with 1 2 inch plywood.

The original plan was to do a 2 concrete pour over our radiant heat system as recommended by our builder. Then we are applying a 6 mil polyethylene vapor barrier over the entire area which will be covered by 3 4 inch plywood underlayment a carpet pad and carpeting. Some wood flooring may not hold sufficiently if installed directly over solid wood subfloors. Then we are laying 2 ft x 8 ft x 2 inch thick rigid insulation sheets between the 2x4 s.