How Thick Is Roof Decking

Once the spacing hits 24 inches a 5 8 inch thick sheet is more ideal.

How thick is roof decking. Keep the 16 oc go with 1 2 osb and add an extra clip in each space. For this you can either go for a half inch or 5 8 inch thick sheet. Plank sheathing usually 1 6 or 1 8 was used as a roof deck before plywood. Most roofs are spaced at least 20 inches apart.

When it s too thin. The thickness of plywood used for roof decking depends on the roof slope the spacing of. Many factors affect thickness. In that case a pullout test device can confirm adequacy.

Flexural strength can be assumed to be 33ksi unless a new single ply system is contemplated that requires a higher pull out strength. An exception to this standard however may occur if you intend to install slate concrete or tile shingles on your roof. Standard structural decking patterns are 2 nominal tongued and grooved t g and 3 and 4 double t g products available with vee or eased edges to meet discriminating architectural requirements. Roof sheathing standard roof sheathing which consists of 4 by 8 sheets of plywood or oriented strand board or osb is 1 2 inch thick and attaches directly to the roof rafters or the roof trusses.

Structural decking also known as roof decking should not be confused with lumber intended for residential and non residential outdoor decks. Plywood is made with three or more layers of thin wood glued together with the grain. The minimum plywood for roofing plywood is layers of wood. Sheathing should be a minimum of 19 32 inch thick.

Never attach roof sheathing with staples. Osb roof decking thickness 7 16 1 2 or 5 8. 8d ring shank nails should be used instead. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

What is plank sheathing. For example a 26 gauge steel panel can range between 0 0179 and 0 0217 inches thick according to a university of north carolina at chapel hill resource. The typical thickness range for sheathing is 3 8 to 3 4 inch.