Why Thickness Of Plywood For Residential Roof

This kind of plywood can be used on roofs with minimal load.

Why thickness of plywood for residential roof.

What size plywood should you use for your roof. Why re sheet over shiplap. 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. Today a shiplap roof is usually 60 years old.

Roofs with very heavy loads may require 3 4 inch thickness. Never attach roof sheathing with staples. The industry offers a thickness of anywhere from 5 16 inch to inch. The typical thickness range for sheathing is 3 8 to 3 4 inch.

8d ring shank nails should be used instead. What plywood should you use for a roof. Sheathing should be a minimum of 19 32 inch thick. For many applications a layer of plywood underneath your metal roofing is an unnecessary expense.

Metal roofing panels rated for architectural use attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturer s instructions and local building codes. Regardless of thickness the plywood should be a type suitable for exterior use graded exterior or exposure 1 references. Plywood on the other hand is made with thin sheets of wood that have been cut from a spinning log then glued together. After the 1960s the predominant residential roofing substrate became 1 2 cdx plywood.

Especially in relation to osb or plywood use for roofs walls floors. Plywood typically comes in 4 8 ft. Foot and with a maximum of spacing of 16 inches between rafters. 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 design.

Look for something that s graded as exposure 1 or exterior. Steeper rather than flatter roofs will have lesser load per sq. Post frames generally lack structural sheathing so the roof and wall panels must span between the supporting trusses or purlins. So what size plywood should you use for your roof.

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. There are several factors to consider. The minimum thickness of plywood used for roofing is 3 8 th of an inch. The most common uses for plywood include support for floors walls roofs and garages in residential construction.

When used for roofing plywood panels are covered and protected by a variety of building materials that keep the elements at bay including roof felt underlayment flashing and shingles.