PIR U-Value Calculator
What is PIR U-Value and Why it Matters
PIR U-Value, or U-value, is a measure of heat transfer through a building element, such as a wall, roof, or floor. It’s crucial for energy efficiency and comfort. A lower U-value means better insulation…
How to Use This Calculator
- Enter the thickness of the PIR insulation in millimeters.
- Enter the thermal conductivity of the PIR insulation in W/mK.
- Click ‘Calculate’.
Formula & Methodology
The U-value is calculated using the formula: U = 1 / (thickness / conductivity).
Real-World Examples
Data & Statistics
| Material | U-Value (W/m²K) |
|---|---|
| PIR | 0.022 – 0.035 |
| Fiberglass | 0.030 – 0.040 |
| Polyurethane | 0.022 – 0.030 |
Expert Tips
- Always use the correct U-value in your calculations.
- Consider the overall thermal performance of your building.
Interactive FAQ
What is the standard thickness of PIR insulation?
The standard thickness of PIR insulation is 50mm, but it can range from 25mm to 150mm.
For more information, see the U.S. Department of Energy’s glossary.