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    Construction & Electrical

    Roof Sloped Area and Packs Calculator

    Estimate a uniform roof plane by dividing its horizontal projected area by cosine of roof pitch angle. Apply waste allowance and product coverage to estimate whole material packs.

    MAKE IT SIMPLE
    Assumptions and limitations

    One uniform slope only. Roof valleys, ridges, overhangs and overlaps need a separate detailed material takeoff.

    Result

    Worked examples

    10×8 m roof projection at zero pitch

    80 m² surface

    Estimate a uniform roof plane by dividing its horizontal projected area by cosine of roof pitch angle. Apply waste allowance and product coverage to estimate whole material packs.

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