Loads will vary with the pitch of the roof.
Roof plywood thickness ontario.
The standard width is 4 feet.
Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood.
Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.
Minimum thickness mm 1 with supports 406 mm o c.
The typical thickness range for sheathing is 3 8 to 3 4 inch.
Astm c1177 c1177m.
Astm c1396 c1396m.
All of my experience is in southern ontario so the info that follows is based upon that.
That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.
When this is the case experts recommend a 5 8 inch thick sheet.
Rafters you are fine going with 1 2 plywood or 7 16 inch on the 30 pitch approx 7 12 slope.
10 pitch is just over a 2 12 slope which is very shallow.
A flatter roof with rafters farther apart may need a thickness of up to inch.
Sheathing should be a minimum of 19 32 inch thick.
Allow them become larger troubles as well as roofing substitute simply months from currently implies you invest 4 also 5 numbers.
Minimum thickness mm 1 with supports 610 mm o c.
The ontario building code thickness or rating 9 23 15 7.
Thickness or rating 1 the thickness or rating of roof sheathing on a flat roof used as a walking deck shall conform to either table 9 23 14 5 a.
Most roofs will be sheathed in plywood at least 3 8 inch thick.
You can get plywood sheets with a length of up to 10 feet.
You might be tempted to choose a inch thickness although it s unnecessary in most cases.
Small best plywood for rv roof repair services done today can cost you state 400.
Mineral fibre rigid board type 2.
2 the thickness or rating of roof sheathing on a roof not used as a walking deck shall conform to either table 9 23 15 7 a.
It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal.
Never attach roof sheathing with staples.
8d ring shank nails should be used instead.
