What is the default fenestration U-factor rating for metal frame, with thermal break, double-pane skylights?

The default fenestration U-factor rating for metal frame, with thermal break, double-pane skylights is 1.10. The U-factor measures the rate of heat transfer through a building component and reflects the energy efficiency of that component. A lower U-factor indicates better insulating properties.

In the case of metal frame skylights with thermal breaks, they are designed to reduce heat loss compared to traditional metal frames without thermal breaks. The specific rating of 1.10 indicates that these skylights provide a good balance of energy efficiency while still being robust enough to handle the structural demands of skylight applications.

Using this U-factor rating is essential for building codes and energy performance calculations, allowing contractors to ensure that the materials used meet energy efficiency standards. Understanding these ratings is crucial in selecting appropriate skylights for projects, contributing to overall energy conservation in buildings.