Shingles for a 28×40 Roof
A 28×40 footprint at a 6/12 pitch is about 12.5 roofing squares — roughly 42 bundles of architectural shingles plus 4 roll of underlayment. Set your real pitch below.
Shingle bundles
42 bundles
Roof area
1,252 sq ft1,120 sq ft footprint × 6/12 pitch
Roofing squares
12.5 squares1 square = 100 sq ft
Shingle bundles
42 bundles3 bundles/square + 10% waste
Underlayment
4 rolls30# felt, 400 sq ft/roll
Shingle cost (est.)
$1,386~$33/bundle architectural
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