What is Air Sealing and Why is it Essential?
Air sealing is the process of identifying and closing off the countless small cracks, gaps, and openings in your home’s structure—particularly in the attic—that allow conditioned air to escape and outside air (along with moisture and pollutants) to enter. Think of it as plugging the holes in your home’s protective “envelope.”
While insulation slows down heat transfer, it doesn’t stop air movement. Air leakage can significantly undermine your insulation’s performance, leading to energy waste, discomfort, and potential moisture issues. In fact, Natural Resources Canada states that improving your home’s airtightness is often the single most important retrofit for energy efficiency. Air sealing is the critical companion to attic insulation, ensuring you get the maximum benefit from your investment.
