Floor Joist Sleeper

Fasten the sheet with 2 1 2 inch coated screws every 6 inches along the walls and every 8 inches across the sheet.

Floor joist sleeper.

Joists on the ground floor were sometimes a pole pole joist half round joist log joist. The sleeper is designed to prevent warping and mold growth which ultimately extends the life of your floor. A round timber with one flat surface and in barns long joists were sometimes supported on a sleeper a timber not joined to but supporting other beams. You do this by using wood shims to create a perfectly level surface across the top of the entire joist system.

The sleepers are short pieces of lumber that ll connect the side joists to the double end joists adding support. If you re installing sleepers on a wood floor you can use untreated 2 by 4 lumber. Moisture barrier a moisture barrier must be used to to cover the concrete floor before you build or have someone build your subfloor sleepers. Step 3 start underlayment set the first sheet of underlayment tongue to the wall with the long side perpendicular to the sleepers and 1 2 inch from the wall.

Either line them up directly over the joists that lie beneath the subfloor or run them perpendicular to the joists. However because the subfloor may have dips or depressions you have to level out the sleeper joists before attaching them. Fasten the sleepers through the shims with powder actuated fasteners. Caution wear eye protection hearing protection and a dust mask when cutting lumber or composite material.

Avoid a sleeper layout where the boards are parallel to the joists but run between them because this configuration lacks structural support.