How To Frame A Floor Over Concrete

Framing a floor over concrete i ve got a project coming up and have some questions.

How to frame a floor over concrete.

These will be the end sill plates that support the ends of the floor joists. The most straightforward method is not to attach it but float the floor on top. Studs are placed every 16 or 24 along the wall so you ll need enough 2 x 4 boards to cover it. Secure each length to the slab with concrete nails spaced approximately 32 inches apart and 8 to 12 inches from each end.

We ll take care of that in step 3. These folks have a sunroom which is built with concrete blocks concrete floor and old aluminum storm windows. Use a minimum 3 4 inch cd exposure 1 plywood sheathing 4 foot by 8 foot sheets. The floor is 4 inches lower than the adjacent kitchen floor.

Place 16 inch planks perpendicular or diagonal to direction of flooring. Install it flat on the slab surface with the outside edge aligned against the side wall or the edge of the floor line. Plan is to open things up between the two knock out the old windows and the block wall. Begin by cutting sheets to 16 inches by 8 feet or smaller panels marked 3 8 of an inch deep on back and a minimum of every 12 inches across in width.

Lay 6 mil polyethylene sheeting over the concrete to minimize moisture migration from the concrete up into the wood flooring. You can attach it directly to the concrete or install a subfloor first and then attach the floor to that. Alternatively screw rows of treated 1x4s to the concrete 16 in. Don t worry about the gap.

Treated plywood to the concrete with concrete screws spaced every 16 in. We ll need some breathing room to make it fit. 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.