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Grizzly Insulation Co

Commerce City Insulation  ›  Blown-In Insulation

Blown-In Insulation in Commerce City, CO

Headquartered in Commerce City, we know why Reunion two-stories roast in July while Historic Commerce City ranches lose heat. Blown-in restores even, full-depth attic coverage to the rated R-value.

Your Front Range crew

Based in Commerce City, serving Commerce City and the metro

Where does your attic actually stand?

Real attic R-value comes from consistent depth and full coverage across every square foot, not a number on a bag. Settled, patchy, or wind-washed loose-fill, common where South Platte gusts hit exposed eaves, quietly underperforms, so we install to the Climate Zone 5B target of R-49 to R-60 and verify it with a depth gauge before we leave.

Bare or stripped attic, R-0
Older Front Range attic, R-19 to R-30
Zone 5B attic minimum, R-49
Grizzly blown target: attic R-49 to R-60
TRUSTED PRODUCTS & PARTNERS

The Brands Behind Every Grizzly Install

As the local crew, we don’t hide behind unfamiliar brand names. Every Commerce City attic gets trusted, code-rated cellulose or fiberglass loose-fill, chosen for your attic’s specific condition.

01THE PROBLEM

The Attic Problems Blown-In Insulation Quietly Solves.

Mid-century ranches near old Commerce City were built with attic insulation levels that were considered fine decades ago and have been settling and compacting ever since. Newer Reunion homes usually start closer to code but rarely get topped off as they age. Add the near-constant plains wind that finds its way through open soffits and unsealed attic bypasses, and most hot-upstairs, high-bill complaints we see locally come down to under-depth or gappy loose-fill and air leaks, not a failing furnace.

A · Attics still sitting at an old R-19 to R-30

Bonus rooms and home offices framed above an attached garage sit over unconditioned space, so heat drains through the floor while the garage pulls it away below. You get cold floors, a room running 10–15° off the rest of the house, and a furnace that never catches up. We insulate the floor joists, knee walls, and sloped ceilings, then air-seal the garage ceiling and rim.

B · Loose-fill that has settled, thinned, or gone flat

Most Commerce City basements, the brick ranches east of Wadsworth, the split-levels around Lake Arbor, have bare concrete or block foundation walls. Finishing that basement without insulating the walls first buys you a cold, clammy room and a heating bill to match. Blown-Ins in the new stud walls, with the correct vapor retarder, turn it into comfortable, usable square footage.

C · Bare patches, gaps, and wind-washed eaves

Additions, pop-tops, and finished attic conversions are often framed to the minimum of their day, or never insulated in the walls at all. That leaves one part of the house always chasing the thermostat. Filling the wall, floor, and rafter cavities with properly sized blown-in insulation brings the new space up to the same comfort as the original home.

D · Ice dams and a top floor that never holds heat

Insulation isn’t only about temperature. Blown-Ins packed into interior walls and between floors cut the sound that travels between a media room and the bedrooms, an office and the living room, or upstairs and down. Mineral wool does this best. It’s a small add during a remodel that quietly changes how the whole house feels.

02THE FIX

Cellulose or Fiberglass. One Honest Recommendation.

Because we work in this county every week, we start every job with a real attic inspection, not a drive-by estimate. We air-seal top plates, can lights, and the attic hatch, install eave baffles to keep soffit airflow open, then recommend dense-packed cellulose or fiberglass loose-fill based on what your attic actually needs.

 Blown CelluloseMost walls & floorsBlown FiberglassThe fire & sound upgrade
How it worksRecycled cellulose blown evenly across the attic floor to R-49–R-60Blown fiberglass that resists moisture and settles less over time
Best forAttic floors, topping off thin insulation, low-slope atticsDamp-prone attics and homes that want minimal settling
Install time A few hours for most attics1–2 days
Cost per R-value LowestHigher upfront, fire & sound benefit
Air sealing Rim & top plates sealed first Rim & top plates sealed first
Pest deterrence Borate-treated options available, Naturally fire-resistant
Eco profile Recycled-content material, Sand & recycled glass
Our verdict: the right answer for most attic insulation and top-off projects.
When foam wins: a vaulted or cathedral ceiling with no attic access. See spray foam in Commerce City.
03WHAT TO EXPECT

A Half-Day Inside. Here's How It Goes.

A Commerce City attic job typically starts with our crew walking the attic and marking target depth, moves through air-sealing and baffle installation, then the blowing machine fills the floor evenly. Since we’re local, most jobs wrap up in a few hours with no long wait for scheduling.

STEP 1 · PREP
Walkthrough & protection

We confirm the plan from your assessment, then protect floors and finishes around the work area.

STEP 2 · AIR-SEAL & BAFFLE
Air-seal & set baffles

We air-seal top plates, can lights, and the attic hatch, then set baffles at the eaves so airflow cannot wind-wash the new insulation.

STEP 3 · BLOW TO DEPTH
Blown to marked depth

Loose-fill is machine-blown evenly across the attic floor to the marked depth, filling every gap around joists, ducts, and penetrations.

STEP 4 · DEPTH CHECK
Depth verified corner to corner

We check coverage against depth-ruler cards staked across the attic so you hit the rated R-value corner to corner.

STEP 5 · WALKTHROUGH
Cleanup & final walk

We vacuum up, haul away offcuts, and walk every cavity with you before we leave.

The Grizzly 100% Guarantee

If the work isn't right, we make it right. That's the reputation we've built across the Front Range, and it's our only sales pitch.

04COST & SAVINGS

What Blown-In Insulation Costs in Commerce City

Pricing varies job to job based on attic square footage, the target depth and R-value you’re aiming for, how much air-sealing the attic needs, and whether old or soiled insulation has to be removed first. As the hometown crew, we’ll walk you through an itemized quote before anything’s scheduled.

Attic square footage

The attic floor area we cover to target depth

Current attic R-value

How far your attic sits below the Zone 5B target

Air-sealing & baffles

Top plates, can lights, hatch, and eave baffles

Removal needs

Only if material is soiled or damaged

Three ways the net cost drops

Xcel Energy rebates

Qualifying insulation + air-sealing upgrades earn utility rebates across Commerce City. We flag what applies in your estimate.

Federal 25C tax credit

30% of qualifying insulation costs, up to $1,200 per year, under the Inflation Reduction Act.

Lower bills, every month

Heating and cooling dominate Front Range energy bills, and unconditioned walls and floors are among the highest-impact upgrade point in most Commerce City homes.

★ ★ ★ ★ ★

Our ranch near Historic Commerce City had ice building up over the garage every winter for years. Grizzly sealed the attic bypasses and topped off the insulation to full depth, and this past winter the ice dam basically didn't happen.

D
David R.
Homeowner, Historic Commerce City, Commerce City · Blown-In Insulation
05QUESTIONS

Blown-In Insulation in Commerce City, Answered Straight

Prefer to just ask?

Call the local Grizzly crew that lives and works in Commerce City, (303) 854-6221, for a free, no-pressure attic assessment.

Blown-in insulation is loose-fill cellulose or fiberglass machine-blown across an attic floor to a measured depth, filling gaps around joists and wiring that rigid batts miss. Locally, it’s the standard fix for both first-time attic insulation and topping off older homes that have settled.

There isn’t a universal winner. Dense-packed, borate-treated cellulose resists settling and pests well, while fiberglass tolerates moisture better and won’t compact as much over time. We inspect your Commerce City attic and recommend whichever material fits its ventilation and condition.

Usually, yes, new blown-in insulation can go directly over existing material as long as it’s dry and hasn’t matted down or been contaminated. If we find damaged or compressed insulation during the inspection, we’ll remove it first so the new material performs the way it should.

Commerce City sits in Climate Zone 5B, where the attic floor target is R-49 to R-60. That typically means roughly 14 to 20 inches of loose-fill depending on material, which we measure on-site rather than estimate from square footage alone.

Cellulose settles somewhat over its first year or so, so we install a bit past the target depth to compensate; fiberglass generally holds its loft longer. Years of plains wind pushing through open soffits can also wind-wash insulation near the eaves, thinning it out gradually even without obvious settling.

Blown-in is the right call for attic floors, especially ones with irregular framing or existing insulation to top off, which describes most Commerce City attics we see. Batts still make sense in open wall cavities, and spray foam earns its higher cost at roof decks or unusually tight spaces, not a standard attic floor.

07GET STARTED

Find Out How Much Heat Your Attic Is Losing.

Backed by our 100% guarantee, right here at home.

Get Your Free Blown-In Quote

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