Air Sealing in Fort Collins, CO
Seal the hidden gaps around top plates, recessed lights, plumbing, and rim joists to stop drafts, dust, and heat loss — best done before adding insulation.
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What is air sealing?
Air sealing is the targeted closure of the hidden gaps and cracks that let conditioned air escape and outside air leak in. Even a well-insulated attic can underperform if warm air flows up through unsealed bypasses — the gaps around top plates, plumbing and wiring penetrations, recessed light fixtures, the attic hatch, chimney chases, and rim joists. In a typical home these leaks add up to the equivalent of leaving a window open all winter. Air sealing closes those bypasses using caulk, foam, and specialized materials, dramatically reducing drafts, dust, and heat loss. It is the single most cost-effective companion to any attic insulation upgrade, and it is best done before new insulation is added so the leaks are accessible. In Northern Colorado, thorough air sealing also helps prevent the ice dams that form when warm air leaks into a cold attic, melting snow that refreezes at the eaves. We identify the bypasses unique to your home and seal them so your insulation can actually do its job — delivering even temperatures, lower bills, and a more comfortable, draft-free home.
Benefits of air sealing
Stops drafts
Closes the hidden gaps that cause cold, drafty rooms.
Lowers energy bills
Less heated and cooled air escapes the building envelope.
Helps prevent ice dams
Stops warm air from melting snow on cold roofs.
Reduces dust & allergens
Sealed envelope keeps out dust, pollen, and pollutants.
Boosts insulation performance
Insulation works far better once the air leaks are closed.
Where we air seal
- Attic top plates and bypasses
- Recessed light fixtures
- Plumbing and wiring penetrations
- Attic hatches and pull-down stairs
- Chimney and flue chases
- Rim joists and band boards
Our process for air sealing
Free inspection
We identify the air leaks and bypasses unique to your home.
Seal penetrations
We caulk and foam around wiring, plumbing, and lights.
Seal big bypasses
We seal top plates, chases, the attic hatch, and rim joists.
Optional blower door test
We can verify the improvement with a blower door test.
Add insulation
We top up insulation over the now-sealed attic floor.
Air Sealing project gallery
Real air sealing work from our crew across Fort Collins and Northern Colorado.
Commercial custom ceiling insulation project
Closed-cell spray foam wall cavity insulation
Attic blown-in cellulose deep thermal fill
Attic rafter wall spray foam air & moisture barrier
What our customers say
"Highly recommend. Best spray foam company I've used. Showed up when they said they would. Did what they said they would. Will be using again."
"Everflow insulated our home in Fort Collins. The temperature difference on our second floor was night and day within 24 hours. Super clean crew and courteous owners!"
"Professional, punctual, and extremely knowledgeable. They explained the difference between closed-cell and open-cell spray foam and saved us a bundle on our garage remodel."
Air Sealing FAQ
Air Sealing from Everflow Spray Foam
Family-owned · Commercial-grade equipment · Top-tier materials
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Areas we serve
Air sealing across Northern Colorado and Southern Wyoming. Click your area to learn how we serve it.
Get a free air sealing quote
Free, no-obligation estimate from your local Fort Collins air sealing experts.