Concrete Overlay Over Wood Subfloor

If you re applying the concrete topping to a wood floor where you have moisture concerns a flexible waterproofing membrane over the plywood is all that is needed to provide protection from moisture.

Concrete overlay over wood subfloor.

The substructure must be well construction to successfully support a cementitious overlay. Find out how to this is done properly. Self leveling concreteunderlayments are used to rehabilitate old floors that are out of level. You can use overlays to create concrete surfaces that run up wood walls.

The overlay may be as thin as 3 8 of an inch so the surface prep is keenly important. Overlays are also used down wood stairs over wood countertops and more often than not across wood floors or decks. A subfloor over radiant in floor heat sunk in concrete useless radiant heat. Replace any weak or water damaged wood.

Secure loose boards with deck screws and fill open seams with rapid setting polymer modified concrete. The heat transfer to subfloor will be very very little. I would not be surprised to see that the crack had followed a seam in the plywood or decking in the sub floor. Why would you want to do this.

You would then need to find another way to heat the kitchen. They can be used over pre cast concrete planks wood subfloors in multifamily housing and on slabs on grade in single family homes. Concrete floor video on how to install concrete over an existing wood subfloor. 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.

Prepare by sanding down to clean bare wood. We recommend applying param 5500 at a minimum thickness of 3 8 1 2 is preferred to withstand lateral movement and traffic stress. 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. Your subfloor would have to be concrete with the new wiring sunk into the.

You can turn off the heat to the floor if you put a subfloor over top. Installing concrete overlays over a wood surface is tricky but it can be done. Utilizing control joints along long seams or large areas is important.