Felt & Membrane Calculator
Calculate roofing felt or membrane coverage for roof slopes and boarded areas.
Roof felt for a 3m by 2.4m roof area
For a roof area measuring 3 metres by 2.4 metres, this estimate includes felt or membrane rolls using the default roll coverage below.
- Coverage area7.92 m²
- Rolls required1
Results - Felt & Membrane Calculator
- Coverage area7.92 m²
- Rolls required1
How this felt and membrane calculator works
It uses the roof or floor area and adds an overlap allowance before converting the total into roll quantities.
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