Estimate the roof shingle bundles needed.
Roofing is sold by bundles, each covering a fixed area. Multiplying the roof area by a waste allowance and dividing by bundle coverage gives the order quantity. Roof waste from cuts at hips and valleys is substantial, so a bundle calculator with an allowance prevents running short.
Shingle Count
Bundles = area x (1 + waste) / bundle coverage
Bundles = area x (1 + waste) / bundle coverage Roofing is sold by bundles, each covering a fixed area. Multiplying the roof area by a waste allowance and dividing by bundle coverage gives the order quantity.
Roof waste from cuts at hips and valleys is substantial, so a bundle calculator with an allowance prevents running short.
This calculator takes 3 inputs: Roof area, Bundle coverage, Waste allowance. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.