Irc Roof Sheathing Requirements

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 9 5 mm head complying with astm f1667 of a length to penetrate through the roofing materials and not less than 3 4 inch 19 1 mm into the roof sheathing.

Irc roof sheathing requirements.

Allowable spans for lumber used as roof sheathing shall conform to table r803 1. The typical thickness range for sheathing is 3 8 to 3 4 inch. A certificate of inspection issued by a lumber grading or inspection agency meeting the requirements of this section shall be accepted. Sheathing should be a minimum of 19 32 inch thick.

Back to diagram. 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. 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. Each manufacturer shall publish the allowable maximum loads and spans for service as floor and roof sheathing for their treatment.

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. Wood structural panel roof sheathing shall be bonded by exterior glue. 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. 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.

Sheathing r803 irc provisions. 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. 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 code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.

International residential code 2015 irc 2015. Spaced lumber sheathing for wood shingle and shake roofing shall conform to the requirements of sections r905 7 and r905 8. 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. Never attach roof sheathing with staples.

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. Where the roof sheathing is less than 3 4 inch 19 mm thick the.