Flashing is not required at hip and ridge.
R903 1 roofing spacing plywood.
Where flashing is of metal themetalshallbecorrosion resistantwithathickness of not less than provided in table r903 2 1.
R908 2 structural and construction loads.
Table 1 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.
Weather exposure for wood shingles shall not exceed those set in table r905 7 5 1.
1 inch 25 4 mm.
Spacing between shingles shall be not less than 1 4 inch to 3 8 inch 6 4 mm to 9 5 mm.
Drains or scuppers of section r903 4 1 to be added to an existing roof.
Weather exposure for wood shingles shall not exceed those set in table r905 7 5.
Minimum thickness of lumber roof sheathing.
Where roof framing with a specific gravity 0 42 g 0 49 is used spacing of ring shank fasteners shall be permitted at 12 inches 305 mm on center at intermediate framing in nailing zone 1 for any v ult and in nailing zone 2 for v ult less than or equal to 140 mph in accordance with figure r803 2 3 1.
Fasteners for wood shingles shall be corrosion resistant with a minimum penetration of 1 2 inch 13 mm into the sheathing.
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.
Minimum 600fb 1 150 000 e.
Minimum 420 fb 660 000 e.
Where the roof sheathing is less than 3 4 inch.
Roof decks shall be covered with approved roof coverings secured to the building or structure in accordance with the provisions of this chapter.
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.
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.
Flashings shall be installed at wall and roof intersections wherever there is a change in roof slope or direction and around roof openings.
Spacing between shingles shall not be less than 1 4 inch to 3 8 inch 6 mm to 10 mm.
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.
