Required Thickness Of Roof Sheathing

For the most common roof sheathing in our area which is 1 2 nominal 7 16 actual sheathing over trusses or rafters at 24 on center there is no requirement for h clips.

Required thickness of roof sheathing.

Comes in standard 4 by 8 foot sheets is strong. Loads will vary with the. You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness. Sheathing should be a minimum of 19 32 inch thick.

And if you re still wondering what roof sheathing is and what materials are typically used read on and satisfy your curiosity. If you re in search of quotes for a roof sheathing job improvenet can put you in touch with up to four local contractors for free. Roof sheathing panel spacing hints. And for wood structural panel sheathing r803 2 2 allowable spans.

Oriented strand board osb or plywood can be used although plywood will provide higher nail head pull through resistance. Use a 10d box 0 128 inch by 3 inch nail as a spacer to gauge 1 8 inch edge and end spacing between panels. Many code requirements are not inspected. According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing.

Roof sheathing materials plywood. Spacer type panel edge clips are available from some manufacturers. Sheathing type typically 15 32 inch or thicker panels are required in high wind areas. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

8d ring shank nails should be used instead. Use panels rated as exposure 1 or better. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. The apa table has a span rating for the sheathing installed with or without h clips and the span rating is the same both ways.

Never attach roof sheathing with staples.