BlueCollarRoofing square
1 roofing square = 100 ft² of roof surface.
ROOFERS / WATERPROOFERS
Roofing
Roof area, pitch, squares and material references. Use the tabs below to switch between working calculators and quick field-reference material.
Roofers
Roofing Squares
Estimate roof area, roofing squares, bundles, and waste from length, width, pitch, and number of roof planes.
Open calculator → RoofersRoof Pitch
Convert rise/run into pitch, angle, pitch factor, and rafter length.
Open calculator → RoofersShingle Bundles
Estimate shingle bundles from roof square footage, bundle coverage, and waste.
Open calculator →Field-reference aid. Use approved drawings, current codes/standards, manufacturer data and job-specific procedures for final decisions—especially for lifting, electrical, pressure, fire-protection and life-safety work.
Pitch
Pitch is commonly stated as rise per 12 inches of horizontal run.
Slope factor
Roof surface area is plan area multiplied by a slope factor; valleys, hips and waste increase material needs.
System details
Fastening, underlayment, flashing and membrane requirements come from the roof-system manufacturer and project specifications.
Need a specific table or takeoff chart?
Send us what you use in the field and we can build it into this trade section.
Suggest reference data