Windows, doors, and roofs are the biggest ways homes lose heat. We’re coming up on the winter months and losing heat means losing money. If you have your heat running, and its constantly flowing right through your windows and doors, it may be time for a change. There are so many energy efficient windows and doors on the market, but how exactly is energy efficiency measured?

U- Values

A u-value is the measure of heat transmission of building products, such as doors and windows. Another way to explain u-value is the effectiveness of a building material as an insulator. Now, because technically the u-value is measuring the rate of heat loss, the lower the u-value, the better. The U-value is expressed in watts per square meter, per degree Kelvin, or W/m2K.

Framing Materials

The U-value is how the energy efficiency of doors and windows is measured, but there are many variables that can go into making doors and windows more energy efficient and increase insulation. Both windows and doors have frames which can be wood, aluminum, fiberglass and many other materials. Each with differing levels of insulation and functionalities. Windows and doors with glass panels can have tons of material options that go into the glass paneling. Thickness, number of panes, glass filling and so much more.

Talk to our experts at Climate Door and window and they can take you through the energy efficient rating process and show you our many different energy efficient products! Winter is coming but don’t let heat slip through your windows and doors. Upgrade to more energy efficient products and save money while saving heat!