Insert cedar shims to raise the sleepers at low spots.
Wood sleepers roof.
This is the standard gapping for duralife products.
Treated wood will last longer but it does not mean that the wooden sleepers cannot be attacked by fungus or rot due to exposure to moisture.
Decking laid directly over packed soil will rot quickly and wood laid over concrete rots as well when moisture is trapped between the two materials.
Fasten the sleepers through the shims with powder actuated fasteners.
1 4 6 4 mm minimum gap where the decking meets a solid wall maximum of 3 8 9 5 mm recommended.
A set of sleepers supports the decking and allows moisture and air to flow below it.
Roof top deck with sleeper system install guide deck must be designed to ensure that proper drainage and air flow are maintained.
3 16 4 8 mm gap between boards.
Sleepers are placed between the deck surface and the ground or slab below it.
Products for wood roofing maximum stretch ames maximum stretch is a thick high quality rubber and acrylic elastomeric roof coating designed specifically for waterproofing repairing and maintaining many different types of roofs.
In addition the wood will deteriorate and rot from weathering and biological attack.
Lay a 4 foot level across the sleepers to make sure they lie on the same plane.
Untreated timbers have certain natural resistance.