Laying Floor Joists On Concrete

That would not be allowed in my area and they use the minimum height in crawlspace to enforce it with the local requirement being 36 inches.

Laying floor joists on concrete.

Lay the 1x4s perpendicular to the direction you intend to install the floor planks. Joists over concrete wall. Renovating a bathroom and we have stripped back to the concrete floor underneath. Secure each length to the slab with concrete nails spaced approximately 80 cm 32 inches apart and 20 to 30 cm 8 to 12 inches from each end.

Space the joists according to standard space codes no greater than 16 inches on center. Cut the floor joists. I just moved into an outdated 1959 ground flr maisonette with concrete floors. Install it flat on the slab surface with the outside edge aligned against the side wall or the edge of the floor line.

Can i just lay my floor joist directly on the concrete. A spacing of 16 inches is great but joists are often spaced by 24 inches and that s more dicey usually requiring an extra layer of subflooring. The exact number of floor joists you ll need will depend on the size of the floor. The spacing of the floor joists is also an important factor but you can usually compensate for wide spacing by adding extra layers of subflooring.

Alternatively screw rows of treated 1x4s to the concrete 16 in. I ve done joist on concrete and seen it done in other parts of the country but i never liked it. Put the floor joists on the layout marks on the sill plate. Install the sleepers directly on the concrete and make sure the screws penetrate the surface by at least one inch.

Then nail the flooring planks with a standard flooring nailer see photo for details. Install it flat on the slab surface with the outside edge aligned against the side wall or the edge of the floor line. Protect the sleeper system. If the uneven floor is due to floor joists that have warped or twisted over time or were incorrectly installed the only way to level the floor is to remove the subflooring and shim the joists.

Nail each end of each floor joists to the sill plates according to the manufactures requirements usually 3 10d nails floor joists attached to rim joist. Install the sleeper joists parallel to the direction of the water run off. Stick framed floors typically consist of 3 main components the sill plate which goes on top of the concrete foundation the rim joists which box in the edges of the sill plate and the floor joists which run parallel to one another to provide internal support. Treated plywood to the concrete with concrete screws spaced every 16 in.

We are putting new wooden joists down and a. These will be the end sill plates that support the ends of the floor joists. Secure each length to the slab with concrete nails spaced approximately 32 inches apart and 8 to 12 inches from each end. The concrete seems to have been treated with a.