How To Frame A Floor Over Concrete

You can attach it directly to the concrete or install a subfloor first and then attach the floor to that.

How to frame a floor over concrete.

The hard way nails or screws. The floor is 4 inches lower than the adjacent kitchen floor. Plan is to open things up between the two knock out the old windows and the block wall. When we build the frame on the ground we ll need to slide it vertically into place.

There are three ways to lay a floor over concrete. Secure each length to the slab with concrete nails spaced approximately 32 inches apart and 8 to 12 inches from each end. Alternatively screw rows of treated 1x4s to the concrete 16 in. Studs are placed every 16 or 24 along the wall so you ll need enough 2 x 4 boards to cover it.

Stack three 2x4 blocks on the concrete floor at each stud location and measure the stud length for each stud along the wall by measuring from the string line down to the top of the blocks 1 block for the sill plate and 2 blocks for the top plate cut the studs to length making sure to keep them in their proper order. Install it flat on the slab surface with the outside edge aligned against the side wall or the edge of the floor line. Treated plywood to the concrete with concrete screws spaced every 16 in. We ll take care of that in step 3.

We ll need some breathing room to make it fit. Don t worry about the gap. The most straightforward method is not to attach it but float the floor on top. Use a minimum 3 4 inch cd exposure 1 plywood sheathing 4 foot by 8 foot sheets.

These folks have a sunroom which is built with concrete blocks concrete floor and old aluminum storm windows. These will be the end sill plates that support the ends of the floor joists. Lay 6 mil polyethylene sheeting over the concrete to minimize moisture migration from the concrete up into the wood flooring.