At Simpson, we know that the performance of your doors is just as important as their beauty. That's why all Simpson doors are manufactured in accordance with approved practices in both of our manufacturing facilities. And because the needs of our customers vary from state to state, we are constantly testing and re-testing our doors to ensure we meet and exceed the building codes and issues facing the industry today.

Here at Simpson, we are constantly striving to supply our customers with the most beautiful and efficient doors possible. Our research and engineering efforts have been a major reason why our doors continue to perform well while retaining the classic beauty that has become synonymous with the Simpson name.

Over the years, we have received questions from many of our customers regarding energy-efficiency. Here are answers to some of the most common questions, as well as a summary of the most recent testing results for many of Simpson's doors.

Energy Efficiency - U-Values, SHGC