Attic Air Sealing & Insulation
For most Southwest Colorado homes, the attic is where the money leaks out. We seal the attic plane, then bring insulation up to R-49–R-60 — the highest-ROI energy upgrade you can make, and the only real cure for ice dams.
What a Sealed, Insulated Attic Does
Ice dams — gone
Cold, uniform roof = no melt-refreeze cycle at the eaves. The permanent fix, not a band-aid.
Lower heating bills
Air sealing + R-49–R-60 typically cuts heating costs 25–40% in Southwest Colorado homes.
No more cold rooms
Stop the stack effect that pulls heat out the top and cold air in the bottom of the house.
Less attic moisture
Sealing the attic floor keeps humid house air out of the attic — less frost, less mold risk on the sheathing.
Know Your Numbers: Climate Zone 5B/6B
Durango (6,512 ft) is IECC Zone 5B; the high country is 6B. Attics need R-49 minimum — R-60 is the building-science target at altitude — plus 3.0 ACH50 or better air tightness. Ice dams, drafts, and brutal heating bills are usually attic problems wearing a disguise. LPEA members can stack rebates worth up to $3,000 a year on this work.
Our Attic Process
- 1
Inspect & diagnose
We check existing depth and type, look for moisture and venting issues, and (where useful) run a blower-door test for a leakage baseline.
- 2
Air seal the attic plane
Top plates, wire/pipe penetrations, recessed lights, chases, dropped soffits, and the attic hatch — sealed and dammed off.
- 3
Insulate to target R-value
Blown-in cellulose or fiberglass over the floor to R-49–R-60, or closed-cell foam at the roof deck for conditioned attics and cathedral sections.
- 4
Verify & document
Depth markers, photo documentation, and a re-test where applicable — so the result is provable for rebate programs.
Attic Insulation FAQs
How much insulation does my Durango attic need?
Durango sits in IECC Climate Zone 5B and most of the high country runs Zone 6B. Code is R-49 minimum in attics; building scientists recommend R-60 at this elevation. Many pre-1990 homes here are sitting at R-19 or less — which is why the heating bills hurt.
Why air seal before adding insulation?
Insulation slows heat; it does nothing for air leakage. If you blow more insulation over a leaky attic floor, warm air keeps escaping straight through it. We seal top plates, wire and pipe penetrations, recessed lights, the attic hatch, and chases first — then bring R-value up. Sealing is what makes the insulation actually work.
Will this fix my ice dams?
Yes — permanently. Ice dams form when a warm attic melts roof snow that re-freezes at the cold eaves. Air seal the attic plane and insulate to R-49+ and the roof stays cold and uniform. No heat cables, no roof gimmicks — just the building-science fix.
Spray foam, blown-in, or both for an attic?
Most attic retrofits get air sealing + blown-in cellulose or fiberglass over the attic floor — fast, cost-effective, and rebate-friendly. We use closed-cell spray foam at the roof deck when you want the attic conditioned (HVAC up there) or for cathedral and low-slope sections. We'll tell you which fits your house.
Do attic jobs qualify for rebates?
They're the best rebate candidates we do. LPEA members: up to $1,500/year ($3,000 income-qualified). Colorado HEAR: up to $1,600 for insulation and air sealing. Federal 25C tax credit: 30% of qualifying costs. We document everything so you collect it.
End the Ice Dams. Cut the Bills.
Book a free attic assessment. We'll measure what you've got, show you what code-plus looks like, and lay out a plan with rebates already factored in.