Just How to Estimate Roof Covering Products: 11 Actions
https://www.red-bookmarks.win/cost-to-shingle-a-roofing-system-calculator-3
Heavier laminated roof shingles and also three-tabbed shingles require 4, or occasionally five, packages to cover a square. There are 29 standard-sized roof shingles (12 in when tiles come 3 bundles to the square.