Insulation for 25 m²
5 percent waste. Check package coverage.
Area with waste
26.2m²
Packages (3.7 m²)
8
packages = 25 × 1.05 ÷ coverage per package
About 269 sq ft.
Open the Insulation CalculatorAbout this estimate
Insulation is sold by coverage area, which depends on the product and its thickness. This page assumes 3.7 square metres per package as an example, so use your own product figure.
Cutting batts? A sharp utility knife cuts fibreglass and mineral wool cleanly.
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Common questions
How much insulation for 25 square metres?
With 5 percent waste, about 26.2 square metres, roughly 8 packages at 3.7 square metres each.
How do I know the coverage?
Read the coverage printed on the bag or roll and divide your area by it. Products vary widely.
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