1507.8 Wood shingles.
BC § 1507.8
The installation of wood shingles shall comply with the provisions of this section and Table 1507.8. Table 1507.8Wood Shingle and Shake Installation Roof Item Wood Shingles Wood Shakes Roof Item Wood Shingles Wood Shakes 1. Roof slopeWood shingles shall be installed on slopes of not less than three units vertical in 12 units horizontal (3:12).Wood shakes shall be installed on slopes of not less than four units vertical in 12 units horizontal (4:12).
2.Deck requirement Temperate climateShingles shall be applied to roofs with solid or spaced sheathing. Where spaced sheathing is used, sheathing boards shall be not less than 1" × 4" nominal dimensions and shall be spaced on centers equal to the weather exposure to coincide with the placement of fasteners.Shakes shall be applied to roofs with solid or spaced sheathing. Where spaced sheathing is used, sheathing boards shall be not less than 1" × 4" nominal dimensions and shall be spaced on centers equal to the weather exposure to coincide with the placement of fasteners. When1" × 4" spaced sheathing is installed at 10 inches, boards must be installed between the sheathing boards. Ice forming along the eaves causing a backup of water.Solid sheathing required.Solid sheathing is required.
3.InterlaymentNo requirements.Interlayment shall comply with ASTM D 226, Type 1.
4.Underlayment Temperate climateUnderlayment shall comply with ASTM D 226, Type 1.Underlayment shall comply with ASTM D 226, Type 1. Ice forming along the eaves causing a backup of water.An ice barrier that consists of at least two layers of underlayment cemented together or of a self-adhering polymer-modified bitumen sheet shall extend from the eave's edge to a point at least 24 inches inside the exterior wall line of the building.An ice barrier that consists of at least two layers of underlayment cemented together or of a self-adhering polymer-modified bitumen sheet shall extend from the lowest eave's edge of all roof surfaces to a point at least 24 inches inside the exterior wall line of the building.
5.Application AttachmentFasteners for wood shingles shall be hot-dipped galvanized or Type 304 (Type 316 for coastal areas) stainless steel with a minimum penetration of 0.75 inch into the sheathing. For sheathing less than 0.5 inch thick, the fasteners shall extend through the sheathing.Fasteners for wood shakes shall be hot-dipped galvanized or Type 304 (Type 316 for coastal areas) with a minimum penetration of 0.75 inch into the sheathing. For sheathing less than 0.5 inch thick, the fasteners shall extend through the sheathing. No. of fastenersTwo per shingle.Two per shake. ExposureWeather exposures shall not exceed those set forth in Table 1507.8.7Weather exposures shall not exceed those set forth in Table 1507.9.8 MethodShingles shall be laid with a side lap of not less than 1.5 inches between joints in courses, and no two joints in any three adjacent courses shall be in direct alignment. Spacing between shingles shall be 0.25 to 0.375 inch.Shakes shall be laid with a side lap of not less than 1.5 inches between joints in adjacent courses. Spacing between shakes shall not be less than 0.375 inch or more than 0.625 inch for shakes and taper sawn shakes of naturally durable wood and shall be 0.25 to 0.375 inch for preservative-treated taper sawn shakes. FlashingIn accordance with Section 1507.8.8.In accordance with Section 1507.9.9. For SI: 1 inch = 25.4 mm, °C = ((°F) - 32)/1.8.
