⭐⭐⭐⭐⭐ Trusted by Denver-area homeowners · 150+ insulation projects completed
Denver's Trusted Insulation Experts Built for Colorado Homes
Grizzly Insulation Co. is a Colorado insulation and air-sealing company built on one simple belief: every homeowner deserves honest recommendations, exceptional workmanship, and year-round comfort no matter what the Colorado climate brings.
- Serving the Denver metro and Front Range
TRUSTED PRODUCTS & PARTNERS
The Brands Behind Every Grizzly Install
We don’t install mystery material. Every project uses products from the industry’s most trusted manufacturers.
INSULATION COMPANY IN DENVER & THE FRONT RANGE
Built for Colorado homes, by people who understand them
Colorado is a demanding place to keep a home comfortable. We ask our houses to hold heat through single-digit January nights and Chinook wind swings, then keep interiors cool under the intense high-altitude sun a mile above sea level sometimes in the same week. Older Denver neighborhoods add another layer: brick bungalows in Wash Park, Highlands foursquares, and post-war ranches in Arvada and Lakewood were built long before modern energy codes, and many still carry their original, thinning insulation.
Grizzly Insulation Co. was founded to give those homes a straight answer. Too many homeowners had been sold a truckload of insulation when what they really needed was proper air sealing, or handed a vague quote with no explanation of why. We built our company around diagnosis first measure, inspect, explain and workmanship that we’d be comfortable putting in our own homes.
Solutions That Solve the Root Cause
We inspect, diagnose, and recommend only what your home actually needs, never unnecessary upgrades.
150+
Projects completed
~45 mi
Front Range service radius
100%
Satisfaction guarantee
8+
Manufacturer partners
Why Homeowners Choose Us
Expertise you can feel, service you can trust
From your first inspection to the final cleanup, we focus on honest advice, quality workmanship, and insulation solutions that truly improve your home’s comfort and efficiency.
Diagnosis, not guesswork
We measure existing R-value, test for air leakage, and inspect the crawl space before recommending anything. You get the real picture of how your home loses energy.
Building-science trained
Our work follows BPI practices and manufacturer specs from Owens Corning, CertainTeed, Johns Manville, Knauf, and GreenFiber so assemblies perform as designed.
Clean, respectful crews
We protect floors and living space, contain dust, and haul away every scrap of old material. Your home is left better than we found it.
Honest recommendations
If air sealing alone will fix most of the problem, we’ll say so. We’d rather earn a referral than oversell a job.
Local accountability
We’re your Front Range neighbors, not a national call center. When you call (303) 854-6221, you reach the people doing the work.
Insured & guaranteed
Fully insured crews and a 100% satisfaction guarantee on every project the assurance you should expect before letting anyone into your attic.
What We Value
Comfort, efficiency, and doing it once correctly
- A home that holds temperature evenly, room to room, without the furnace running all night.
- Lower Xcel Energy bills that come from stopping air leakage at the source, not from a sales pitch.
- Removing contaminated insulation and sealing crawl spaces so the air upstairs stays clean.
- Recycled-content and low-impact materials where they make sense, plus rebate guidance to make upgrades affordable.
- Clear scopes, written quotes, and explanations you can actually understand.
EVERY COMMUNITY WE SERVE
Insulation Services Across the Front Range
Grizzly serves the entire Denver metro from our Commerce City base. Click your city for local details: