Insulation Thickness Calculator
Calculate the required insulation thickness to achieve a target R-value for a given wall or roof area.
How to Use the Insulation Thickness Calculator
- Enter the dimensions of the area or structure (length, width, height).
- Specify material parameters if prompted (thickness, overlap, etc.).
- Review the calculated material quantity and coverage area.
- Use the results to plan your purchase and budget.
Quick Reference
| From | To |
|---|---|
| Paint (1 coat) | ~0.15 L/m² |
| Tile 30×30 cm | ~11 pcs/m² |
| Wallpaper roll | ~5.3 m² coverage |
| Laminate | +10% waste allowance |
| Cement (screed) | ~20 kg/m² (5 cm) |
| Bricks | ~50 pcs/m² wall |
Use Cases
- •Estimating the quantity of materials needed before purchasing.
- •Planning renovation budgets with accurate material calculations.
- •Reducing waste by computing exact material requirements.
- •Comparing costs between different material options for a project.
Frequently Asked Questions
What is the R-value?
R-value (thermal resistance) measures how well insulation resists heat flow. Higher values mean better insulation. It is measured in m²·K/W.
How is thickness calculated?
Thickness = R-value × thermal conductivity (λ) of the material. Each material has a different λ value.
What R-value should I target?
Typical targets: walls R3–R5, roofs R5–R8, floors R2–R4. Check local building codes for exact requirements.
What is thermal conductivity?
Thermal conductivity (λ) is the material property measuring heat transfer rate. Mineral wool ≈ 0.04 W/m·K; polyurethane foam ≈ 0.025 W/m·K.