Bundles, underlayment, drip edge, ice & water, ridge cap, and nails — from the building footprint and roof pitch. 3 bundles per square, pitch factor applied automatically. Ontario building-code-aware ice & water at eaves.
Total horizontal gutter line.
Total sloped roof edges.
0 if it's a gable roof.
Each valley line.
Ontario OBC 9.26.6: at least 36″ past the inside face of the wall. 2 courses = ~6 ft up.
7% gable · 10% standard · 15% complex hip / multiple dormers.
14.76 squares · 1,200 sqft footprint × 6/12 pitch.
3 bundles per square + 10% waste.
40 lf ridge + hips · ~25 lf per bundle.
10 sq rolls (1000 sqft) — covers full deck.
200 sqft rolls · eaves + valleys covered.
≈ 15 × 10 ft sticks.
1.25″ galvanized · 1.5 lb per square.
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