Attic Insulation in Denver & Lakewood, CO

Stop paying to heat your attic. AtticPro installs code-compliant R-49 to R-60 attic insulation — blown-in, spray foam, and air sealing — that ends the hot-upstairs, cold-downstairs problem, slashes your Xcel bills, and pays for itself with rebates we deduct right off your invoice.

Signs It's Time to Re-Insulate Your Attic

Most Denver-metro homes built before 2015 are under-insulated for Colorado’s climate, so your furnace and AC work double-time replacing conditioned air that leaks straight through the attic. You’re likely overdue if you notice:

  • Rooms that never match — a roasting upstairs and a freezing main floor.
  • Utility bills that spike every deep-freeze winter and high-altitude summer.
  • Ice dams forming along your roof eaves after a snow.
  • Drafts and cold floors no thermostat setting fixes.
  • Insulation you can see that’s thin, uneven, or matted below the joists.

A free AtticPro assessment measures your exact current R-value and shows you the gap.

How We Insulate Your Attic — Done Right, Usually in a Day

Every attic upgrade follows the same building-science sequence, so the insulation actually performs instead of just sitting there:

Our proven attic insulation process
  1. Free assessment & R-value diagnosis — we inspect, measure your current R-value, and give you upfront pricing with a rebate estimate.
  2. Remove & prep (if needed) — old, contaminated, or rodent-damaged insulation is vacuumed out, leaving a clean deck.
  3. Air seal first — we seal hidden gaps around top plates, can lights, and plumbing penetrations.
  4. Insulate to R-49 to R-60 — premium blown-in cellulose or fiberglass at Colorado code density.
  5. Clean walkthrough & rebate handling — we file your Xcel paperwork; most jobs done in 4 to 6 hours.

Why Attic Insulation Is Important

Your attic is one of the largest areas of energy loss in the home. During colder months, heated indoor air rises and escapes through under-insulated attic spaces. During warmer months, attic heat transfers downward into living areas, making cooling systems work harder.

Proper attic insulation helps:
  • Reduce heating and cooling costs
  • Improve indoor comfort
  • Minimize temperature fluctuations
  • Reduce HVAC strain
  • Improve overall energy efficiency


Many older homes still have insufficient attic insulation, making upgrades one of the most valuable energy-efficiency improvements homeowners can make.

The Right Material for Your Attic

Cellulose Blown-In Insulation

Cellulose insulation is made primarily from recycled paper materials treated for fire resistance. It is known for dense attic coverage and strong thermal performance.

Common Benefits:
  • Dense coverage around attic gaps
  • Good thermal resistance
  • Eco-friendly material composition
  • Effective sound reduction
Fiberglass Blown-In Insulation

Fiberglass blown-in insulation uses loose fiberglass fibers designed to create a thermal barrier throughout attic spaces.

Common Benefits:
  • Lightweight installation
  • Moisture-resistant properties
  • Long-lasting performance
  • Effective attic coverage

Frequently Asked Questions

How do I know if my attic needs new insulation?

If you’re seeing utility-bill spikes, uneven temperatures floor to floor, or ice dams on your eaves, your attic is venting conditioned air. A quick assessment shows your exact current R-value and the gap to code.

Most residential attic retrofits — removal, air sealing, and blowing fresh R-49 to R-60 insulation — are done in 4 to 6 hours, with containment barriers so your living space stays clean.

The U.S. Department of Energy recommends R-49 to R-60 for our Colorado climate zone. We install to that standard.

Yes. Sealing air leaks and reaching R-60 stops your HVAC from overworking, and most Front Range homeowners see a significant drop in heating and cooling costs.

Ready to Stop Losing Money Through Your Attic?

Book a free, no-obligation attic assessment. You will get your current R-value, a clear scope, upfront pricing, and your rebate estimate — no pressure.

Request Your Free Estimate

Your Path to a More Efficient Home

Helping homeowners improve comfort, reduce energy costs, and maximize long-term efficiency.

Free Home Energy Assessment

Customized Efficiency Recommendations

Transparent Quote & Rebate Review

Professional Installation Services

Comfort & Savings You’ll Notice

Proudly Serving Denver & The Front Range

From the foothills to the plains, we provide expert attic insulation services to homeowners across Colorado.

North Metro

West / Foothills

South Metro

East Metro