Flat Roof Plywood Thickness

The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an inch.

Flat roof plywood thickness.

Foot and with a maximum of spacing of 16 inches between rafters. This kind of plywood can be used on roofs with minimal load. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Roofs plywood.

Steeper rather than flatter roofs will have lesser load per sq. Plytanium 3 8 cat. For pricing and availability. Osb and plywood come in thicknesses ranging from 5 16 to 3 4 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load and roof.

It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal. A roof that lays practically flat will have a much heavier load than a steeper roof that allows rain snow and ice to roll right off. In this case plywood should be a minimum of 3 8 inch thick. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.

However you may need to consider bolstering the plywood thickness for a roof that has a higher load. You can get plywood sheets with a length of up to 10 feet. The standard width is 4 feet. For pricing and availability.

With edge support and the same snow load 3 8 inch osb can be used. The minimum thickness of plywood used for roofing is 3 8 th of an inch. Sheets of 7 16 inch thick with no edge support can be used in an area where the snow load is 30 pounds per square foot. Plytanium 23 32 cat ps1 09 square structural pine sheathing application as 4 x 8.