Can you pour concrete on top of plywood?

If you’ve got a plywood subfloor, like many buildings do, you can leave it in place and apply self-leveling concrete directly on top of it. Once the plywood subfloor is covered, just apply the finish you want to achieve the desired look.

How do you prep wood for concrete?

Place the wood in a large trough. Fill the trough with water to cover the wood. Soak the wood for eight to 12 hours. The excess water content in the wood will prevent the concrete from sticking to the wood.

Can concrete touch wood?

In most cases, either pressure-treated lumber or naturally durable lumber (defined by the IRC as the heartwood of redwood, cedar, black locust, and black walnut) is acceptable. In some cases, separating wood from concrete with a water-impervious membrane or vapor retarder is all that’s required.

How do you protect wood when pouring concrete?

Oil-Based Release Agents. At one time, construction professionals would create their own oil-based form release agents using materials such as diesel fuel, home heating oil and mineral oil to keep poured concrete from sticking to wood.

Can you pour self-leveling concrete over wood?

Wood floors need to be primed before covering them with self leveler. The floor will be covered with water-saturated leveler, which will cause the wood to swell. It will shrink back down when it dries, which could cause cracks in the underlayment and tiles above.

Does wood rot in concrete?

With concrete holding the moisture against the wood, wood has no chance and will eventually lose the battle. Now you don’t have to lose all hope because it’s for certain that the concrete around the post will crack, therefore making it easy to pull out when it starts to rot.

How do you prepare plywood for concrete?

Shovel a trowel-full of mix over the tape that covers each plywood seam. Smooth out a thin layer of concrete mix until it is flat. Spray primer over the prepared plywood surface using a paint or garden sprayer until you’ve covered all areas. Allow a few hours for the primer to air dry.

Can you pour self-leveling concrete over plywood?

It’s absolutely possible. A self-leveling compound is a polymer-based concrete that can level pretty much anything. To use this on plywood, you’ve to get rid of all dirt and debris. Use a floor primer to coat the entire floor afterward.

What do you put between wood and concrete?

Anyplace where wood meets the ground or concrete, the lumber must be pressure treated. For additional moisture protection, a gasket or strip of closed-cell foam can be installed between the concrete foundation and the sill plate.

Can you put concrete on top of wood?

You can use overlays to create concrete surfaces that run up wood walls. Overlays are also used down wood stairs, over wood countertops, and — more often than not — across wood floors or decks. The substructure must be well construction to successfully support a cementitious overlay.