3 8 plywood is pretty stable to absorb the ridges.
Plywood leveling shims for roof.
When using plywood to flatten the floor it s good practice to use a urethane adhesive to hold it in place.
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.
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.
Mark the thick end of the 6 ft shim onto the thin end of the blank butt the ends together and scribe.
I was going to install a hardwood floor 5 8 thickness but ther.
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.
Measure the size of your room using a measuring tape.
In this video you ll see how you can do plywood subfloor leveling using the plywood sheets.
With a six foot shim in hand remove the 2x4 blank from the straight edge jig and set the jig aside.
The idea is to get it as supported as you possibly can and then use the 3 8 plywood to level everything out.
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.
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.
The end of a plywood or osb sheet should align with the rafters center and this is called breaking on center.
Install shingles according to manufacturer s guidelines.
Measure the combined width of the jig and 2x4 blank making sure not to cut off the first few inches off the shim.
You can check this with a 6 to 10 foot piece of lumber or a long carpenter s level.
Glue and screw the plywood.
3 cover the shimmed subfloor.
Use a brush for application in smaller areas.
Usually they just use a single piece of 1 1 2 inch wide shim.
Thoroughly cover all areas with one coat of primer to enhance adhesion of the leveling compound to the plywood surface.
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.
Sheathing is supplied in 4 8 sheets and are designed to be installed onto rafters with 16 24 spacing.
Apply a latex floor primer to the entire plywood surface using a paint roller.
Cut sheets of 3 8 inch plywood to size with a circular saw to cover the entire floor.
