Air Sealing in Bellvue & Fort Collins, CO
Sealing the hidden leaks that waste heat and cause drafts — the highest-return first step before adding insulation, and part of a wildfire-aware attic for foothills homes.
Where homes leak — and what we seal
Air leaks hide in predictable places, and they add up to the equivalent of leaving a window open year-round. The biggest culprits are up high and down low, where the 'stack effect' drives warm air out the top of the house and pulls cold air in at the bottom. We target the whole set: attic top plates, recessed lights, plumbing and wiring penetrations, the attic access hatch, rim joists in the basement, band joists, duct connections, and gaps around windows and doors.
Using caulk, foam, gaskets, and weatherstripping matched to each location, we close these pathways so your heating and cooling stays inside where you paid to put it.
- Attic top plates, penetrations, and recessed lights
- Attic hatch and knee-wall gaps
- Basement and crawl space rim and band joists
- Soffit and vent detailing — wildfire-aware for foothills homes
- Window, door, and sill leaks
Why homeowners choose it
- Stops the drafts and cold spots insulation alone can't fix
- Makes new insulation perform to its full rated R-value
- Lowers heating and cooling bills, often significantly
- Reduces dust, pollen, and wildfire-smoke infiltration
- Helps prevent ice dams by cutting attic heat loss
- Soffit/vent sealing supports wildfire-aware attic hardening for foothills homes
Insulation slows heat, but it doesn't stop air. If your Larimer County home is leaky — and most homes built before modern energy codes are — warm air escapes through hundreds of small gaps around the clock, dragging cold, dry, wind-driven outdoor air in behind it. Air sealing finds and closes those leaks, and it's almost always the highest-return efficiency work you can do. Done before an insulation upgrade, it makes every dollar of new R-value actually perform.
From attic top plates and can lights to rim joists, plumbing and wiring penetrations, ductwork, and the attic hatch, we methodically seal the pathways that let your conditioned air leak away. For foothills and Rist Canyon-area properties, we also look at soffit and vent sealing through a wildfire-aware lens — the same detailing that stops heat loss helps keep embers and smoke from finding their way into an attic during a Front Range fire season.
Why air sealing comes before insulation
It's tempting to just pile on more insulation, but insulation laid over a leaky attic floor underperforms because air moves right through and around it. Sealing the leaks first means the new insulation you add actually delivers its rated R-value. That's why we treat air sealing as step one of any attic or wall upgrade — it's the cheapest, highest-ROI work in the whole project, and it multiplies the value of everything that follows.
Measured results with blower-door testing
Air sealing is most effective when it's measured, not guessed. A blower-door test depressurizes the home so we can quantify how leaky it is and pinpoint exactly where the air is moving, and a follow-up test confirms the improvement. This diagnostic approach — part of our energy-audit service — turns air sealing from a hopeful effort into a verifiable result, and provides the documentation that Fort Collins Epic Homes and PVREA rebate programs often require.
Ideal for
- Drafty homes with cold or hot rooms
- Any home about to add attic or wall insulation
- Older Fort Collins, LaPorte, and Bellvue houses that were never sealed
- Foothills and Rist Canyon properties wanting wildfire-aware soffit/vent detailing
- Homes with high winter heating bills
What affects the cost
How air sealing works, start to finish
Free assessment / blower-door test
We inspect your home, measure existing R-value, and confirm whether you're Epic Homes, PVREA, or Loveland Water & Power territory.
Custom plan & itemized quote
A clear, honest scope — the right material in each area, with rebates factored into the real net cost.
Clean, professional install
Our crews prep, air seal, and install to your target R-value, on schedule and with the site protected.
Final inspection & rebate paperwork
We verify the finished work and help file the correct program's documentation before any deadline closes.
Air Sealing done right, on the property in front of us.
Every home and outbuilding around Bellvue, Fort Collins, and Rist Canyon is a little different. We assess yours, not a template, before a single piece of material goes in.
Fort Collins Epic Homes · PVREA · Loveland Water & Power
Air Sealing projects frequently qualify for a utility rebate — but which program applies depends on your address. We confirm it before we quote, and help with the paperwork.
Air Sealing questions, answered
It's often the single best-value efficiency improvement a home can make. Air leaks can waste as much energy as a window left open all year. Sealing them costs far less than a major insulation project and delivers immediate comfort gains — and it makes any insulation you add afterward perform to its full rating.
Yes — always seal first. Insulation slows heat but doesn't stop air movement, so adding it over unsealed leaks underdelivers. Sealing the attic floor and other pathways first ensures your new insulation reaches its rated R-value. We treat air sealing as step one of any attic or wall upgrade.
It's a genuine secondary benefit. Sealing soffit and vent penetrations to stop conditioned-air leakage also closes many of the same pathways that let wind-blown embers and smoke reach an attic during a wildfire event. It's not a substitute for defensible-space work, but it's a real, complementary layer for Rist Canyon and foothills-adjacent properties.
It's a diagnostic that uses a calibrated fan mounted in an exterior door to depressurize your home, revealing how much air it leaks and exactly where. We use it to target sealing work and to verify the improvement afterward. It's part of our energy-audit service and provides documentation many rebate programs require.
Related services
Ready for a free air sealing quote?
Tell us about your home and we'll put together a clear, no-pressure quote — plus tell you which of the three Larimer County rebate programs you qualify for.