Roof Thickness For House

The thickness of plywood used for roof decking depends on the roof slope the spacing of.

Roof thickness for house.

Rafters are the structural beams that support the weight of the roof sheathing and the shingles. Post frames generally lack structural sheathing so the roof and wall panels must span between the supporting trusses or purlins. For example we build residential in flat plate concrete which will typically have a column spacing of 20 oc and a slab thickness of 8 typ. Answered october 6 2017.

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. The minimum plywood for roofing plywood is layers of wood. The house base area is the area of land that the house covers and for more complex shapes can be estimated using the area calculator. The answer depends mostly on how far apart the rafters are and the roof loads which vary based on the pitch of your roof.

In this case plywood should be a minimum of 3 8 inch thick. Many factors affect thickness. Commercial is typically steel w a composite deck so you ll have a 5 6 slab sitting on top of steel beams. The problem with metal roofing gauge is that there is a wide range of tolerances.

The min thickness of the roof slab should be 6 inches and maximum it can go up to 13 14 inches for span up to 7 m long. Because 22 24 or 26 gauge sheeting is thicker and will therefore remain more structurally sound over a longer span than a 29 gauge the building needs fewer supports which saves your customers money. The most common scenario is a home that has rafters set approximately 16 inches apart. How thick should a roof be.

With that in mind i ve seen slabs as thick as 16 18 due to column spacing. Plywood is made with three or more layers of thin wood glued together with the grain. Studied at srm institute of science and technology. The typical thickness range for sheathing is 3 8 to 3 4 inch.

Trusses are not as thick as rafters are because they are engineered from multiple wood members with the ability.