1507.7.6 Application.
BC § 1507.7.6
Minimum headlap for slate shingles shall be in accordance with Table 1507.7.6 Slate shingles shall be secured to the roof with two fasteners per slate. Table 1507.7.6Slate Shingle Headlap Slope Headlap (inches)4:12 < slope < 8:12 4 8:12 < slope < 20:12 3 slope ≥ 20:12 2 For SI: 1 inch = 25.4 mm.













