Inverted Roof U Value Calculator

Introduction & Importance

Inverted roof U-value is a crucial factor in determining the energy efficiency of your building. It represents the rate of heat transfer through the roof, measured in W/m²K. Understanding and optimizing your roof’s U-value can significantly reduce your energy bills and carbon footprint.

For more information, refer to the U.S. Department of Energy’s glossary and the Building Science Corporation’s guide on roof thermal bridges.

What is the ideal U-value for my roof?

The ideal U-value depends on your climate and local building codes. In general, lower U-values indicate better insulation.