Minimum Sheathing Thickness Roof

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.

Minimum sheathing thickness roof.

Post frames generally lack structural sheathing so the roof and wall panels must span between the supporting trusses or purlins. You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Osb roof decking thickness 7 16 1 2 or 5 8 if were using osb we get 9 16 we dont worry about getting both 7 16 and 9 16 for walls then the roof we just get all of the same.

Building codes for roofing reqiure a minimum 1x4 and the spaces between battens should not exceed 3 1 2 inches figure 2 46 wood shingles over spaced sheathing and figure 2 47 wood shakes installed over wood sheathing are illustrated below. 1 inch 25 4 mm. Many code requirements are not inspected. And for wood structural panel sheathing r803 2 2 allowable spans.

According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing. This way no worrying about grabbing scraps to fill in small spots and not having the correct thickness. The typical thickness range for sheathing is 3 8 to 3 4 inch. 8d ring shank nails should be used instead.

140 wind speed mph 150 mph 160 mph minimum sheathing thickness inches exposure b 7 16 24 16 15 32 32 16 19 32 40 20 minimum sheathing. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. The thickness of plywood used for roof decking depends on the roof slope the spacing of rafters and the weight of other material to be put over the decking as well as the design load the.

Never attach roof sheathing with staples.