Plywood Leveling Shims For Roof

Jon this does happen and that s why i recommend using the 3 8 plywood over the shingles.

Plywood leveling shims for roof.

3 8 plywood is pretty stable to absorb the ridges. All that the builders need to do is utilize a series multiple pieces of wood shims when leveling the main beams in order to reduce the pressure on the shims. Usually they just use a single piece of 1 1 2 inch wide shim. Step 6 screw the sheets of 3 8 inch thick plywood over the shingles using a drill and 2 to 2 1 2 inch subfloor screws to attach them to the entire floor.

If the slope is greater than the thickness of three shingles then plywood should be used and you should step down with different thicknesses of plywood and shingles to even out the floor. Shim the subfloor with shingles and plywood to bring it level in the same way you would if the slope was parallel to the board direction. Cut sheets of 3 8 inch plywood to size with a circular saw to cover the entire floor. A single sliver of 1 1 2 inch wide shim will naturally crush under the weight of nearly any beam in a wood floor system.

You can check this with a 6 to 10 foot piece of lumber or a long carpenter s level. Start with a level nailing surface whether you re using plywood or oriented strand board osb the first step in building a high quality roof is to make sure you have a level nailing surface. The end of a plywood or osb sheet should align with the rafters center and this is called breaking on center. When using plywood to flatten the floor it s good practice to use a urethane adhesive to hold it in place.

Measure the size of your room using a measuring tape. Allow the primer to dry thoroughly. Sheathing is supplied in 4 8 sheets and are designed to be installed onto rafters with 16 24 spacing. I was going to install a hardwood floor 5 8 thickness but ther.

Use a brush for application in smaller areas. Thoroughly cover all areas with one coat of primer to enhance adhesion of the leveling compound to the plywood surface. In this video you ll see how you can do plywood subfloor leveling using the plywood sheets. 3 cover the shimmed subfloor.

Apply a latex floor primer to the entire plywood surface using a paint roller. You can fix this by adding shims onto the top rafters or chords to make a more level nailing base. Mark the thick end of the 6 ft shim onto the thin end of the blank butt the ends together and scribe. With a six foot shim in hand remove the 2x4 blank from the straight edge jig and set the jig aside.

Glue and screw the plywood.