Concrete Overlay Over Wood Subfloor

Installing concrete overlays over a wood surface is tricky but it can be done.

Concrete overlay over wood subfloor.

We recommend applying param 5500 at a minimum thickness of 3 8 1 2 is preferred to withstand lateral movement and traffic stress. 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. 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.

The overlay may be as thin as 3 8 of an inch so the surface prep is keenly important. Secure loose boards with deck screws and fill open seams with rapid setting polymer modified concrete. Self leveling concreteunderlayments are used to rehabilitate old floors that are out of level. 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. Metal lath stapled over plywood substrate. Overlays over wood surfaces. Find out how to this is done properly.

Your subfloor would have to be concrete with the new wiring sunk into the. You can use overlays to create concrete surfaces that run up wood walls. The heat transfer to subfloor will be very very little. Prepare by sanding down to clean bare wood.

Concrete floor video on how to install concrete over an existing wood subfloor. The sub floor must be free of deflection l 360 considering both live and dead loads. I would not be surprised to see that the crack had followed a seam in the plywood or decking in the sub floor. 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.

You can turn off the heat to the floor if you put a subfloor over top. 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. Replace any weak or water damaged wood.