Air sealing, what makes insulation actually work.
Insulation slows heat. Air sealing stops the leaks that move it. Doing one without the other is like wearing a sweater with the front unzipped. We hunt down the leaks: top plates, plumbing chases, recessed lights, attic hatches, rim joists, and around windows, then we caulk, foam, and gasket them shut.
What's included in this service?
- Visual leak audit with thermal camera when warranted
- Foam top plates, chases, and ceiling penetrations
- Replace old recessed lights with IC airtight or air-seal covers
- Gasket and weatherstrip the attic hatch
- Caulk plumbing, electrical, and HVAC penetrations
- Foam rim joists and band joists in crawl or basement
- Weatherstrip exterior doors
- Report sealing locations with photos
When do you need this service?
- Insulation upgrade, air sealing comes first
- House feels drafty even when nothing is open
- Heating or cooling bills are high relative to similar homes
- Whole-house fan or wood stove changes which rooms run cold
- You can hear outside noise more than you should
What do homeowners ask about Air Sealing?
What is the biggest air leak in most San Diego homes?
Recessed lights and the attic hatch. Older recessed cans were not airtight, and most attic hatches sit on bare drywall with no gasket. Together they can equal a hand-sized hole open to the attic 24/7. Both are easy fixes.
Do I need a blower-door test?
Not always. For most retrofits we can find the leaks visually plus a thermal camera on a cool morning. Blower-door tests make sense on whole-home performance contracts and Title 24 alteration projects, we'll tell you when it's worth the cost.
Can I just air-seal and skip new insulation?
You can, and on some homes it is the highest-return move. But if your attic is also under R-19, you are leaving the bigger savings on the table. Most homeowners do both at the same visit.
Where do we offer Air Sealing in San Diego County?
We provide air sealing in every city and community in San Diego County. Pick your city for local climate notes and service specifics.
See air sealing in all 67 cities
Homeowners who hired us for this
Examples of the kind of feedback we work to earn on every job. Verified reviews from real customers live on our Google Business Profile and Yelp pages.
We had R-13 batts from 1979 that had settled to nothing. Crew air-sealed top plates first, then blew cellulose to R-49. Upstairs bedrooms feel different now, the AC actually keeps up on hot afternoons.
Got three quotes. Thermal Pro was the only one who recommended air-sealing before insulation and pushed for the radiant barrier given the East County heat. Bill dropped 18 percent in the first August. Worth every dollar.
Our vaulted ceiling was the hottest room in the house. Closed-cell foam at the roof deck completely changed the room. Crew masked everything carefully, came back to check the cure, walked us through the reoccupancy timeline. Professional all the way.
Need air sealing in San Diego County?
Call for a free quote. Most work scheduled within the week.