Insulation & air sealing, done the building-science way
From drafty century-old bungalows in Wash Park to newer builds in Highlands Ranch, we diagnose the whole thermal envelope and fix energy loss at the source not just where it shows.
150+
Projects completed
100%
Satisfaction guarantee
~45 mi
Front Range radius
Insured
& BPI-certified
ALL INSULATION SERVICES
All Insulation Services We Offer
Click any service below for full details on our process, materials, and what to expect:
Blown-in cellulose to R-49–R-60, warmer rooms and lower Xcel bills for Front Range ranches and two-story homes. Most attics finished in one day.
Closed-cell air barrier for rim joists, garages, and additions. Highest R-value per inch, stops drafts and moisture in a single pass.
Can lights, attic hatches, flues, and chases sealed first, because new insulation over air leaks is money over a hole.
HEPA-filtered extraction of rodent-soiled or water-damaged insulation. Clean attic deck, safer indoor air, disposal handled for you.
Encapsulation and vapor barriers that turn damp crawl spaces into dry, healthy foundations, steadier floors, cleaner air upstairs.
EPA-registered TAP® borate insulation delivers thermal performance and rodent deterrence in one install. Mice won’t nest in it.
Spray foam and fiberglass systems for shops, warehouses, and offices across the Denver metro, code-compliant, on schedule, minimal downtime.
Blown-in insulation fills attic gaps, improves energy efficiency, reduces drafts, and delivers consistent comfort with fast, professional installation and lasting performance.
Batt insulation provides reliable thermal protection for walls, floors, and ceilings, improving comfort, reducing noise, and increasing year-round energy efficiency.
HOW WE WORK
How We Work, Step by Step
A clear four-step process, from first visit to final walkthrough, so you always know what happens next:
Free in-home assessment
We inspect the attic, crawl space, and problem rooms, measure existing R-value, and pinpoint where air and heat are escaping then explain what we find in plain language.
A written plan & honest quote
You get a clear scope, materials, timeline, and price up front, along with any rebates or financing that apply. If air sealing alone will solve most of the problem, we’ll tell you.
Clean, protected installation
Our insured crews protect your floors and living space, install to manufacturer spec, and treat your home like our own den.
Walkthrough & guarantee
We review the completed work with you, confirm you’re comfortable, and back it with our 100% satisfaction guarantee.
INSULATION SERVICES
Frequently Asked Questions
Common questions about insulation, answered straight.
Start with the symptoms. Rooms that never hold temperature, a furnace that runs constantly in January, ice dams on the eaves, high Xcel Energy bills, or a musty crawl space each point to a different fix. Grizzly begins every project with a diagnostic walkthrough we inspect the attic, measure existing R-value, check for air leakage at the top plate and penetrations, and look at the crawl space before recommending anything. Many Front Range homes need a combination of air sealing plus added attic insulation rather than one service alone.
The Denver metro sits in the U.S. Department of Energy’s Climate Zone 5B. Current guidance for this zone calls for roughly R-49 to R-60 in the attic. A large share of homes built before the 1990s still have R-19 or less, which is why upgrading attic insulation is one of the highest-return improvements a Colorado homeowner can make. We measure what you have and show you the gap before quoting.
Most attic insulation or air sealing jobs are completed in a single day. Insulation removal followed by a fresh install usually takes one to two days depending on square footage and attic access. Crawl space encapsulation ranges from one to three days based on the condition of the space and moisture remediation needs. We give you a clear timeline in writing before work begins.
In under-insulated Colorado homes, air sealing and attic insulation commonly reduce heating and cooling costs by 10–20%, and sometimes more where the starting point is very poor. The exact savings depend on your home’s baseline, HVAC efficiency, and how you use it. We focus on the building-science fundamentals stopping air leakage first, then adding insulation because that combination delivers the most reliable comfort and savings, not just a bigger number on the invoice.
Yes. Whether we’re removing rodent-contaminated insulation or old, settled fiberglass, we contain the work area, use commercial vacuum equipment, and haul everything away. You should not be left with bags of old insulation or debris in your driveway. Protecting your living space during the job is part of the service.
Grizzly Insulation Co. is insured and works to industry standards including BPI building-science practices. Our installers are trained on manufacturer specifications from partners such as Owens Corning, CertainTeed, Johns Manville, Knauf, and GreenFiber, and every project is backed by our 100% satisfaction guarantee.