Shingles for a 40×50 Roof
A 40×50 footprint at a 6/12 pitch is about 22.4 roofing squares — roughly 74 bundles of architectural shingles plus 6 roll of underlayment. Set your real pitch below.
Shingle bundles
74 bundles
Roof area
2,236 sq ft2,000 sq ft footprint × 6/12 pitch
Roofing squares
22.4 squares1 square = 100 sq ft
Shingle bundles
74 bundles3 bundles/square + 10% waste
Underlayment
6 rolls30# felt, 400 sq ft/roll
Shingle cost (est.)
$2,442~$33/bundle architectural
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