Concrete Overlay On Plywood Subfloor

For metal lath a stucco grade material is fine.

Concrete overlay on plywood subfloor.

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. Duraamen s param 5500 goes on thin in a 3 8 to 1 2 thick application. For example if you install resilient tiles or sheet flooring over a subfloor any bumps dips or voids in the subfloor may be evident in the finished flooring. Score the back of the panels half of the thickness on a 12 inch by 12 inch grid.

Find concrete resurfacing products. After installing a vapor retarder if necessary cut your plywood panels into 2 x8 or 4 x4 sections. The subfloor must be free of deflection l 360 considering both live and dead loads. I have seen anything from chicken wire to concrete wire mesh used successfully.

Metal lath stapled over plywood substrate. As with a floated subfloor nwfa recommends a vapor retarder for glue down subfloors when installing wood flooring over concrete. Cut plywood panels by 2 foot by 8 foot or 4 foot by 4 foot sections. Plywood substrate in a kitchen.

Concrete floor video on how to install concrete over an existing wood subfloor. Underlayment covers subfloor flaws for the best possible results. Find interior concrete overlay products. A cement based waterproofing mortar is also a good option.

It s best to place the underlayment over 3 4 inch thick plywood fastened with screws at 12 to 16 inch intervals to help decrease deflection and add stability. It lays down ultra flat. The following project was executed by tom zilian of madstone floors from boston ma who created a polished concrete floor over a plywood substrate. In this project tom had to remove old tile and install another layer of 3 4 thick plywood.

Apply an adhesive approved for plywood installation and recommended by the plywood manufacturer. 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. Overlap adjacent pieces of lath approximately 1. The nwfa recommends plywood with a minimal thickness of.

We recommend applying param 5500 at a minimum thickness of 3 8 1 2 is preferred to withstand lateral movement and traffic stress. Materials include a minimum of 3 4 inch cd exposure 1 plywood subfloor panels 4 foot by 8 foot sheets.