Calculate pack count from net area, coverage per pack and waste allowance.
Results are for information and preliminary estimation. For critical technical work, manufacturer data, local codes and qualified professional review take precedence.
Packs = area × (1 + waste) / actual m² coverage per pack. Thickness and thermal resistance are separate design choices.
Example: An 80 m² roof, 8 m² per pack and 7% waste requires 11 packs.
Renovation estimates are most sensitive to measurements, product coverage and waste allowance. Before ordering, verify the result against the actual m²/L, m²/pack or unit coverage printed on the product.
No. It estimates quantity; required R/U value and thickness depend on climate and construction.
Product density, thickness and packaging determine actual coverage.
Tell us if a calculation is unclear, incomplete or appears incorrect.