Home & Garden
Insulation Calculator
Estimate insulation pack quantities from area, pack coverage and waste allowance.
Check thickness, product coverage, fire rating, ventilation and installation requirements.
Notes and next steps
How it works
Estimate insulation packs from area, pack coverage and waste.
Estimating method: Adjusted area = area × (1 + waste percentage ÷ 100). Packs = adjusted area ÷ pack coverage, rounded up.
Worked example
30 m² with 5% waste is 31.5 m². If a pack covers 8 m², buy 4 packs.
Common mistakes
- Using the wrong product thickness or type.
- Forgetting awkward cuts and overlaps.
- Ignoring ventilation, moisture and fire requirements.