Enter your House Length, House Width, Roof Pitch, and Eaves Overhang alongside your Roofing Material, Material Cost, Labor Cost, and Waste Factor to get your Total Roofing Cost — plus a breakdown of Total Roof Area, Roofing Squares, Material Cost, and Labor Cost.
Total Roofing Cost
--
Total Roof Area
--
Roofing Squares
--
Material Cost
--
Labor Cost
--
Multiply your house length by width to get the base area, then multiply by the roof pitch factor. Add extra area for eaves overhang. A 6/12 pitch adds about 18% to the base area.
A roofing square equals 100 square feet of roof area. This is the standard unit contractors use for pricing materials and labor. Most roofing estimates are given per square.
Typically 10-15% waste factor is recommended for roofing materials. Complex roof shapes with many angles and cuts may require up to 20% waste factor to account for material loss.
Material costs vary widely by type: asphalt shingles ($100-200/square), metal roofing ($300-600/square), tile ($200-500/square), and slate ($600-1000/square). Quality grade within each type also affects price.
Steeper roof pitches increase the actual roof surface area compared to the house footprint. They also increase labor costs due to safety requirements and difficulty of installation.
Labor costs include tear-off of old roofing, installation of new materials, cleanup, and disposal. Steep roofs, complex shapes, and premium materials increase labor costs significantly.
While online calculators provide good estimates, get professional quotes for complex roofs, historic homes, or when dealing with insurance claims. Local factors and building codes affect final costs.
Most residential roof replacements take 1-3 days depending on size and complexity. Weather, material type, and crew size can affect the timeline. Complex roofs may take up to a week.