Structural Concrete Topping On Plywood Floor

The wood deck is to be covered by a hot mopped fiberglass roofing system which in turn will be protected by a concrete topping sloped to drains which will also be a walking surface.

Structural concrete topping on plywood floor.

With some judicious control joints we only had a few cracks. Unbonded screeds and toppings which are used when it is impossible to ensure a good bond between floor and screed or topping. The concrete was specified to reach 3 500 psi at 28 days with a water cementitious ratio of 0 45 and a max. A structurally sound plywood roof deck about 15 feet wide and 60 feet long dead flat forms a walking plane and terrace for housing units above.

The only noncombustible structural cementitious panel manufactured in the united states. The reduced quantity of concrete and steel reinforcement offsets the marginally higher cost of lightweight concrete floor systems. Slump of 4 with shrinking reducing ad mix. 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.

Structural panel concrete subfloor is a cured in factory panel that is noncombustible inorganic mold moisture termite resistant and dimensionally stable floor assembly suitable for many floor finishes. Lightweight concrete floor provides more efficient strength to weight ratio in concrete floor systems when compared to other conventional concrete floor systems. In this case the screed or topping is separated from the floor by insulation boards or an impervious membrane. These floors are constructed for different purposes but the reduction of dead loads on the structure is.

Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire rated ceiling assembly. The topping mix that you mentioned is ok. Lots of guys pour directly ontop of the plywood but i wanted to find should i put a membrane between the concrete topping over plywood subfloor carpentry contractor talk. Here you can find drawings for our ul fire rated floor assemblies and ul fire rated ceiling assemblies.

We had a similar concrete floor with radiant tubing and the wire mesh attached to spacers just floated over the top of the tubing. Given that the floor is interior the cracks between the existing concrete and the trenches for plumbing and electrical probably won t move. Rather than tear out a wooden floor and installing concrete your wooden floor can be turned into a beautiful concrete floor with a concrete microtopping.