5 calculators
Roofing
Roof area, pitch, coverings, gutters, ventilation.
Roofing CalculatorSquares, shingles, underlayment, starter, ridge and drip edgeRoof Pitch CalculatorConvert rise/run, x/12, degrees and percentMetal Roofing CalculatorPanels, trim, closures and screwsGutter CalculatorGutter lengths, downspouts, hangers and fittingsAttic Ventilation CalculatorNet free area for intake and exhaust
Guides for this trade
Roofing
Roof estimating: squares, pitch factors and shingle quantities
Turn a building footprint into true roof area with the pitch factor, then count every material from the eaves to the ridge.
8 min readRoofingRoof pitch explained: x/12, degrees and percent
Why US roofers say 6/12 and UK roofers say 26.5°, how to convert between them, and how to measure an existing roof.
4 min readRoofingGutters: sizing, downspouts and hangers
How much gutter a roof needs, where to put the outlets, and the fittings that make up a complete run.
4 min read