Insulation Calculator
Calculate insulation packs needed for walls, roofs, and floors
Project Specifications
Enter area and thickness
m²
Total wall/roof/floor area
Common: 50mm, 75mm, 100mm, 150mm
R-Value Guide:
- • 50mm ≈ R-1.5 to R-2
- • 100mm ≈ R-3 to R-4
- • 150mm ≈ R-4.5 to R-6
Product Coverage
From insulation pack label
m²/pack
Typically 5-6 m² per pack at standard thickness
%
5-10% for cutting and fitting
Results
Area (incl. waste)
105m²
Packs Required
📦20
💨 Ventilation
Always leave appropriate ventilation gaps behind insulation. Check product instructions for specific requirements.
✓ Vapour Barrier
Most insulation requires a vapour barrier. Check if your product includes one or if you need to add separate membrane.
How to Use
- 1Measure total area to be insulated
- 2Select insulation thickness (50-150mm typical)
- 3Enter pack coverage from product label
- 4Account for 5% waste (cutting, edge pieces)
- 5Ensure proper ventilation gaps are left
- 6Check local building regulations for min. R-value
Example
100 m² wall insulation at 100mm thickness
Inputs:
Area: 100 m²\nThickness: 100mm\nPack coverage: 5.5 m² per pack\nWaste: 5%
Results:
Packs required: 20