Minimum Sheathing Thickness Roof

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.

Minimum sheathing thickness roof.

Sheathing should be a minimum of 19 32 inch thick. Never attach roof sheathing with staples. 1 inch 25 4 mm. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Minimum roof sheathing thickness excerpt roof sheathing thickness rafter truss spacing 24 in. The typical thickness range for sheathing is 3 8 to 3 4 inch. According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing. You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness.

Post frames generally lack structural sheathing so the roof and wall panels must span between the supporting trusses or purlins. 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. This way no worrying about grabbing scraps to fill in small spots and not having the correct thickness.

Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. 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. Many code requirements are not inspected. And for wood structural panel sheathing r803 2 2 allowable spans.

Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.