Roofing & Insulation
How Many Bundles of Shingles Do I Need? Squares, Waste and Extras
Work out shingle bundles from roof area using squares, bundles per square and 10–15% waste, plus starter strip and ridge cap. Free calculator and example.
Roofing & Insulation
Shingles, roof area and attic insulation.
Roofing & Insulation
How Much Attic Insulation Do I Need? R-Values, Depth and Bags
Find the attic R-value ENERGY STAR recommends for your climate zone, then turn it into bags of blown-in insulation with a free calculator and coverage chart.