Flat Roof Plywood Thickness

With edge support and the same snow load 3 8 inch osb can be used.

Flat roof plywood thickness. 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. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. 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. 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.

The standard width is 4 feet. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. For pricing and availability. For pricing and availability.

The minimum thickness of plywood used for roofing is 3 8 th of an inch. You might be tempted to choose a inch thickness although it s unnecessary in most cases. In this case plywood should be a minimum of 3 8 inch thick. However you may need to consider bolstering the plywood thickness for a roof that has a higher load.

Loads will vary with the. It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal. Roofs plywood. Plytanium 23 32 cat ps1 09 square structural pine sheathing application as 4 x 8.

Plytanium 3 8 cat. The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an inch. Steeper rather than flatter roofs will have lesser load per sq. Foot and with a maximum of spacing of 16 inches between rafters.