Except as provided in Sentence 9.23.16.1.(1), decking for wood shingled roofs may be continuous or spaced.
9.26.9.2.
Grade
Western cedar shingles shall be not less than No. 2 grade.
Eastern white cedar shingles shall be not less than B (clear) grade.
9.26.9.3.
Size
Wood shingles shall be not less than 400 mm long and not less than 75 mm or more than 350 mm wide.
9.26.9.4.
Spacing and Joints
Shingles shall be spaced approximately 6 mm apart and offset at the joints in adjacent courses not less than 40 mm so that joints in alternate courses are staggered.
9.26.9.5.
Fastening
Shingles shall be fastened with 2 nails or staples located approximately 20 mm from the sides of the shingle and 40 mm above the exposure line.
9.26.9.6.
Exposure
The exposure of wood roof shingles shall conform to Table 9.26.9.6.
Table 9.26.9.6.
Exposure of Wood Roof Shingles
Forming Part of Sentence 9.26.9.6.(1)