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Calculate total roof square footage
Minnesota receives about 30 inches of rain annually.
Climate Zone
6
Electricity
$0.14/kWh
Labor Costs
100% avg
Calculate your total roof area in square feet and roofing squares
Tip: Measure the building footprint from the outside walls. Don't forget to include garage or addition areas.
Minnesota is in Climate Zone 6 - Cold (heavy heating, light cooling). Homes here typically have higher heating demands than cooling.
Converting footprint to actual roof area involves several factors:
Some situations warrant professional measurement:
Roof area is measured in square feet. Roofing is sold and quoted in 'squares'—each square covers 100 square feet. So a 2,800 sq ft roof is 28 squares.
Significantly. A flat roof has the same area as the footprint. A 6/12 pitch adds 12% (multiply by 1.12). A 12/12 pitch adds 41% (multiply by 1.41). Check our pitch calculator for exact multipliers.
With careful footprint measurement and accurate pitch determination, you can typically get within 5% of actual. For estimates and ordering, that's accurate enough.
Measure from outside walls—the roof covers the full exterior footprint plus overhangs. Inside dimensions undercount your roof area.