Season 1 - Episode 12
I will tell you right now - this study proves that you should not replace your windows if you want to make your home more comfortable! This study shows that replacement windows only reduce drafts by 6% compared with other, less expensive retrofit plans, including sealing the attic and other important places like the top of the foundation wall in a basement or crawl space. I am a former window contractor, and it was exciting to have an excellent opportunity to test this Silver Spring home in three stages of improvements to the envelope or shell of the house. I tested before any work was done. Then, I tested after air sealing and adding insulation and then I tested again after all of the old window configurations were replaced with new, high-performance vinyl windows.
THE RESULTS WERE ASTOUNDING! Test in: 4187 CFM Test after air sealing attic and basement: 2042 CFM (51% Reduction) Test after installing all new windows: 1805 CFM (6% Reduction)
00:00 A Little Background on this Window and Insulation Expert
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Building Performance Institute
BGE Approved Energy Contractor