Tooele County, Utah
Air sealing in Tooele, UT
Insulation slows heat transfer. Air sealing stops the actual leaks. A house can be heavily insulated and still lose a lot of energy through gaps that insulation alone doesn't fix.
- Top plates, chases and penetrations
- Can light and bath fan covers
- Usually paired with attic insulation, not sold separately after the fact
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Air sealing starts with finding where the leaks actually are — top plates, fixture housings and chases get checked before any sealing happens, not guessed at.
A blower door test or thermal camera can pinpoint leaks that aren’t visible to the eye, and sealing those points first means whatever insulation goes in afterward actually performs the way it’s rated to. Skipping this step is the most common reason a newly insulated attic still feels drafty.
Where houses actually leak
Most air leakage in a typical house happens in the attic and basement rim joist, not the windows people usually blame first.
Where interior walls meet the attic floor — a common, often-missed gap.
Older recessed lighting and bathroom fan housings are rarely sealed to the drywall.
Where the foundation meets the framing — covered in more depth on our crawl space page.
Pipes and wires running between floors create a direct path for air movement.
Good to know
Why sealing comes before insulating
Insulation resists heat flow through a material. It doesn't stop air from moving through a gap. Seal first, insulate second — reversing the order wastes the insulation.
The balloon comparison
A well-insulated but unsealed attic works a bit like a balloon with small holes in it — you can wrap it in blankets and it still won't hold air. Sealing the holes matters more than adding more blanket.
Rebate eligibility
Utah utility rebate programs generally treat air sealing and insulation as a package, and some programs require sealing as a condition of the insulation rebate. See our rebates page for current programs.
Common questions
Is air sealing worth doing if I already have good insulation?
Often, yes. A well-insulated attic with unsealed penetrations can still lose a significant amount of conditioned air. If your energy bills feel high relative to how much insulation you already have, air leakage is a common reason.
How do you find air leaks?
Visual inspection catches most of it — gaps around plumbing, wiring, top plates, and fixture housings are usually visible once the existing insulation is pulled back. For harder cases a contractor can use a blower door or thermal camera to confirm.
Does air sealing help in summer too, not just winter?
Yes. In summer, unsealed gaps let hot attic air pull into the living space and let cooled air escape upward. It works both directions — sealing helps your AC as much as your furnace.
Do you seal basements and crawl spaces too, or just attics?
Both. Attic sealing is the highest-priority area in most homes, but rim joists and crawl space penetrations matter too — that work is covered on our crawl space and rim joist page.