Building a new custom home is an exciting venture, filled with many decisions about design, finishes, efficiency, features, and function. There are many very visible elements that you will decide on through the design process. There is also one less glamorous but equally vital component that deserves your attention: air sealing. Often overlooked and forgotten, proper air sealing is a significant element in the comfort, longevity, and durability of your new home.
What is air sealing?
Air sealing is the process of closing off any gaps, cracks, and openings in your home’s “thermal envelope.” This includes the outer walls, foundation, and roof. These small imperfections, often found around outlets, lights, windows, doors, and plumbing/electrical penetrations, collectively add up to a significant potential for uncontrolled air infiltration. This could be the equivalent of leaving a 3’ x 3’ window open in an average home.
The benefits of an air sealed home
-
Superior energy efficiency and lower energy bills: Air leaks allow outside air to leak in and inside conditioned air to leak out, resulting in your HVAC working harder to keep up.
-
Enhanced indoor comfort: Drafts and cold spots around your house could very well be air leaks in your thermal envelope.
-
Improved indoor air quality: Air leaks are sources for dust, pollen, pests, and even fumes to get into your living space.
-
Effective moisture control and increased durability: Leaks allow moisture to move through your walls, which can lead to mold, rot, and pests.
-
Reduced noise pollution: A tightly sealed home is quieter, keeping external sounds outside.
Make air sealing a priority in your new home
While air sealing might not be on the selection list for your new custom home, it should be part of your performance standard. We use a project manual to set the standard each new home should achieve. Building code now also requires a blower door test to show how much air leaks through your thermal envelope. That is a minimum and should be done by a third-party inspector who has calibrated their equipment within the last 12 months. While building code allows builders to self-perform this test, that may not give you the answers you need to ensure the performance you should get in your new custom home. This is one very important design element that will help protect your investment and its long-term performance, comfort, and value.
