Air Sealing | Greater Portland, Maine
Most Maine homes lose 30–40% of their conditioned air through hundreds of tiny, invisible leaks. We find every one of them and seal them permanently. Often the fastest-payback home improvement available.
We call within 1 business day
We use diagnostic testing to find every leak, not just the obvious ones.
We depressurize your home with a calibrated fan to measure air leakage and identify exactly where conditioned air is escaping. Learn how blower door tests work as part of air sealing.
Our crew works through every penetration, bypass, and gap, using foam, caulk, and weatherstripping as appropriate for each location.
We run a second blower door test after sealing to measure the improvement and verify we've met the target air change rate.
"I had a cold corner in my living room for 10 years. After Horizon sealed the rim joists and attic bypasses, it was gone. The house feels completely different: no more drafts, no more cold spots. Wish I'd done this sooner."
"Working with Horizon Homes was a great experience. They were very detail oriented, extremely knowledgeable, and easy to work with. Was very impressed with their professionalism and communication skills."
"The blower door test was eye-opening. I had no idea how leaky my house was. After the sealing work, the difference was immediate. The house holds temperature so much better and the heating system runs less often."
