Fort Collins Insulation › Blown-In Insulation
Blown-In Insulation in Fort Collins, CO
In Fort Collins, Old Town Victorians to Fossil Lake Ranch builds, foothills wind and wide swings thin attic insulation. Blown-in restores even, full-depth coverage to the rated R-value.
- Free attic depth inspection
- Itemized quote, no pressure
- Xcel rebate guidance
Your Front Range crew
Based in Commerce City, serving Fort Collins and the metro
Where does your attic actually stand?
An attic only performs at the R-value it’s rated for when depth is even and coverage is complete across the whole floor. Settled or wind-washed loose-fill, common where foothills gusts hit exposed eave edges, underperforms its label, so we install and check to the Climate Zone 5B target of R-49 to R-60.
- Measured during free inspections across Fort Collins housing stock. Your exact number comes with your assessment.
TRUSTED PRODUCTS & PARTNERS
The Brands Behind Every Grizzly Install
Nothing unfamiliar goes into your attic. Every Fort Collins job uses trusted, code-rated cellulose or fiberglass loose-fill, chosen to match your attic’s condition and airflow.
01THE PROBLEM
The Attic Problems Blown-In Insulation Quietly Solves.
Old Town’s Victorians and craftsman bungalows were built long before attic insulation standards existed, and what’s up there now has usually settled to a fraction of its original depth. Fossil Lake Ranch’s newer homes tend to start near code but rarely get topped off as insulation naturally compacts. Add CSU-area foothills wind that drives cold air through unsealed soffits and attic bypasses, and most “the furnace can’t keep up” calls we get in Fort Collins actually trace back to under-depth or gappy loose-fill and air leaks, not the furnace itself.
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 Fort Collins 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.
Every job starts with us actually getting into the attic to see what’s there, not guessing from the home’s build year. We air-seal around can lights, the attic hatch, and top plates, install eave baffles to keep soffit vents clear, then recommend dense-packed cellulose or fiberglass loose-fill, one straightforward recommendation based on the inspection.
03WHAT TO EXPECT
A Half-Day Inside. Here's How It Goes.
A typical Fort Collins attic job runs from an initial walkthrough through air-sealing and baffle work, then the blowing machine fills the attic to a marked target depth. Most homes, from Old Town to Fossil Lake Ranch, are done in a few hours with a final depth-check before we go.
We confirm the plan from your assessment, then protect floors and finishes around the work area.
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.
Loose-fill is machine-blown evenly across the attic floor to the marked depth, filling every gap around joists, ducts, and penetrations.
We check coverage against depth-ruler cards staked across the attic so you hit the rated R-value corner to corner.
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 Fort Collins
No two Fort Collins attics cost the same to insulate. Attic square footage, your target depth and R-value, how much air-sealing is needed, and whether old or soiled insulation has to come out first all factor in. You’ll see an itemized quote before work begins.
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 Fort Collins. 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 Fort Collins homes.
★ ★ ★ ★ ★
Our craftsman in Old Town had a second floor that felt like an oven every August and an ice dam over the front porch most winters. Grizzly sealed the attic leaks and brought the insulation up to full depth, and both problems are basically gone now.
D
David R.
05QUESTIONS
Blown-In Insulation in Fort Collins, Answered Straight
Prefer to just ask?
Call the Grizzly crew that will actually be in your attic, (303) 854-6221, for a free, no-pressure assessment anywhere in Fort Collins.
Blown-in insulation is loose-fill cellulose or fiberglass machine-blown across an open attic floor to a measured depth, filling in around joists and wiring where batts leave gaps. In Fort Collins it’s used for both bare attics and topping off older homes whose insulation has thinned over time.
Neither is automatically better, it depends on your attic. Dense-packed, borate-treated cellulose settles less and adds fire and pest resistance, which suits many Old Town attics; fiberglass resists moisture well and holds its loft, useful in well-ventilated newer builds like those at Fossil Lake Ranch. We recommend one after inspecting.
Generally, yes, blown-in insulation can go directly over existing attic insulation as long as it’s dry and not matted or contaminated. If we find compressed, damaged, or moisture-affected insulation during the walkthrough, we’ll flag it for removal before adding new material.
Fort Collins sits in Climate Zone 5B, where the attic floor target is R-49 to R-60. Depending on material, that’s roughly 14 to 20 inches of loose-fill, which we measure on-site with a depth gauge rather than estimate.
Cellulose settles somewhat over its first year or two, so we install a bit beyond target depth to account for it, while fiberglass tends to hold its loft longer. Foothills wind pushing through open soffits can also wind-wash insulation near the eaves over time, thinning coverage even where settling isn’t obvious.
Blown-in wins for attic floors, especially with irregular framing, ductwork, or existing insulation to top off, true for most Fort Collins attics from Old Town to the newer edges of town. Batts still fit open wall cavities well, and spray foam justifies its higher cost at roof decklines or tight, hard-to-reach spaces rather than a standard attic floor.
06EVERY COMMUNITY WE SERVE
Blown-In Insulation Near Fort Collins
Fort CollinsAuroraBoulderBrightonBroomfieldCentennialColorado SpringsCommerce CityDenverGreeleyHighlands RanchLakewoodLittletonLongmontLovelandParkerThorntonWestminster
07GET STARTED
Find Out How Much Heat Your Attic Is Losing.
Every job carries our 100% guarantee.
- (303) 854-6221 · Mon–Sat 8 AM–5 PM · Sun by appointment
- info@grizzlyinsulationco.com, fast replies, usually same day
- 7140 Ivy St Unit B, Commerce City, CO 80022, 10 miles from Fort Collins
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