Roof Sheathing Code Requirements

Sheathing thickness is greater than 15 32 inches roof sheathing is required to be fastened with astm f1667 rsrs 03 2 0 131 nails or astm f1667 rsrs 04 3 0 120 nails.

Roof sheathing code requirements.

The rsrs designation indicates the fastener is a ring shank roof sheathing nail. 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. 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. Asphalt shingles shall be fastened to solidly sheathed decks.

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. Table r803 2 3 1 specifies the maximum fastener. Jump to full code chapter. 8d ring shank nails should be used instead.

Sheathing should be a minimum of 19 32 inch thick. The typical thickness range for sheathing is 3 8 to 3 4 inch. Never attach roof sheathing with staples. Solid sheathing is required in areas where the average daily temperature in january is 25 f 4 c or less or where there is a possibility of ice.

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Structural floor sheathing and structural roof sheathing shall comply with sections 2304 7 1 and 2304 7 2 respectively.