Calculate how many metal roofing sheets or panels you need from the roof area and the panel coverage width.
Metal roofing sheets overlap at the sides, so the effective cover width is less than the full sheet width. Always use the cover width quoted by the manufacturer for an accurate sheet count.
The result is per slope. For a simple gable roof with two equal slopes, double it. Add 10% waste for cuts around hips, valleys and openings, plus ridge, eaves and flashing trims which are ordered separately.
It is the effective width once sheets overlap at the sides, which is less than the full sheet width. Manufacturers quote both, so always use the cover width for counting.
If the slope is longer than one sheet, sheets overlap end to end. Enter the sheet length and end lap and the calculator works out how many rows you need up the roof.
The main figure is per slope. We also show the total for a simple gable roof with two equal slopes, which is double.
Around 10 percent is sensible for cuts at hips, valleys, verges and openings. Complex roofs may need more.
No. Ridge, eaves, verge and valley flashings, plus fixings and sealing washers, are ordered separately to suit your roof profile.
Calculate roofing materials including shingles, underlayment, and ridge caps for your roof.
OpenCalculate the true sloped surface area of a roof from its footprint and pitch, in square feet, square metres and roofing squares.
OpenCalculate the number of plywood or OSB sheathing boards needed to deck a roof, allowing for pitch and waste.
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