Floor Joist And Plywood Floor Or Concrete Slab

I have read in some places that you need a vapour barrier to put over the concrete before installing the plywood and in other places to just glue the plywood to the concrete floor.

Floor joist and plywood floor or concrete slab.

Concrete slabs are also the most efficient for hydronic radiant heating systems as the thermal mass of the slab helps hold heat. However you re not out of the woods. To maintain comfortable temperatures at zero degrees f so either arrangement will provide sufficient heat. Concrete expands and contracts and that type of movement can also crack the tiles and the grout.

Floor joists are typically 2 by 8s 2 by 10s or 2 by 12s. Fir or syp 16 or 24 o c. Concrete slab floors do require that all subgrade utility rough ins be completed before the slab is poured and be accurately located. These studs act similarly to floor joists on top of which you nail sheets of 3 4 inch plywood.

Ft than systems within floor joists 35 btus sq. However well insulated residential structures need only 20 25 btus sq. I have seen many blogs and read a lot and know it can be done but need a bit of help. These will be the end sill plates that support the ends of the floor joists.

I have been researching a lot and would like to install a plywood floor over concrete in two bedrooms in our basement. Some newer homes have manufactured i beam shaped joists. Slabs suspended or on grade put out more heat 50 btus sq. Ceiling joists are usually 2 by 6s or sometimes 2 by 4s if it is an older home.

Retrofits for plumbing or mechanical changes later can be difficult and costly. Hydronic radiant floor heating hrf is usually associated with concrete slabs. For your floor joists 5 1 2 3 4 plywood subfloor brings you up to 9 3 4 floor covering tile carpet brings you to just over 10. Long circuits of 1 2 inch to 3 4 inch polyethylene polybutylene or rubber tubing are arranged over a layer of welded wire mesh and then buried in concrete see radiant slab techniques 8 92.

Can i just lay my floor joist directly on the concrete. The studs keep the wood flooring planks further away from the slab and they minimize the amount of. When installing a ceramic tile floor on a concrete subfloor you don t have to worry about flexing as long as the concrete slab is at least 1 1 8 inch thick which most slabs are. Have done quite a few floor systems over slab never had a complaint from ho inspector or mechanicals.

Secure each length to the slab with concrete nails spaced approximately 32 inches apart and 8 to 12 inches from each end.