Irc Roof Sheathing Requirements

Back to diagram.

Irc roof sheathing requirements.

As an example most building codes being used before hurricane andrew allowed roof sheathing to be attached using 6d nails spaced 6 inches along panel. Sheathing r803 irc provisions. International residential code 2015 irc 2015. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Or less roof fastening zone wind main sheathing to gable overhang velocity roof end wall framingg eaves 3 second panel 123 2 3 2 3. The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. Where the roof sheathing is less than 3 4 inch 19 mm thick the. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.

The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. This also means that when re roofing there are opportunities to improve the roof s wind performance by following best practices for roof to wall and sheathing attachment. Wood structural panel roof sheathing shall be bonded by exterior glue. Spaced lumber sheathing for wood shingle and shake roofing shall conform to the requirements of sections r905 7 and r905 8.

The typical thickness range for sheathing is 3 8 to 3 4 inch. Roof sheathing fastening schedulea b c d e 8d common 0 131 x 2 1 2 inches or ring shank 0 135 x 2 1 2 inches except where noted for exposure b enclosed buildings roof framing spaced 24 inches o c. Spaced lumber sheathing is not allowed in seismic design. Each manufacturer shall publish the allowable maximum loads and spans for service as floor and roof sheathing for their treatment.

8d ring shank nails should be used instead. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. Allowable spans for lumber used as roof sheathing shall conform to table r803 1. Fasteners for asphalt shingles shall be galvanized steel stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 3 mm shank with a minimum 3 8 inch diameter 10 mm head astm f 1667 of a length to penetrate through the roofing materials and a minimum of 3 4 inch 19 mm into the roof sheathing.

Roof sheathing conforming to the provisions of table 2304 7 1 2304 7 2 2304 7 3 or 2304 7 5 shall be deemed to meet the requirements of this section. Sheathing should be a minimum of 19 32 inch thick.