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Grizzly Insulation Co

Aurora Insulation  ›  Blown-In Insulation

Blown-In Insulation in Aurora, CO

In Aurora, Original Aurora bungalows, Del Mar ranches, Southshore and Saddle Rock builds, compacted attic insulation lets the top floor bake. Blown-in restores even, full-depth R-value.

Your Front Range crew

Based in Commerce City, serving Aurora and the metro

Where does your attic actually stand?

R-value in an Aurora attic comes from consistent depth across every square foot, not just what’s piled in the middle, a 6-inch dip near a soffit or a wind-packed corner drags the whole attic’s performance down. Zone 5B calls for R-49 to R-60 up top, and settled or patchy loose-fill in older Aurora attics rarely gets there without a top-off.

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

There’s no mystery bag of insulation going into your attic, every Aurora job uses borate-treated cellulose or certified fiberglass loose-fill from established manufacturers, the same materials used across the Front Range.

01THE PROBLEM

The Attic Problems Blown-In Insulation Quietly Solves.

Original Aurora’s older bungalows often have attics that were insulated decades ago and never topped off, while newer Southshore and Saddle Rock homes can still have builder-grade coverage that’s thinner than it looks. Add Aurora’s wind and hail exposure, and any gap around a can light, chimney chase, or attic hatch turns into a steady heat leak. Homeowners usually blame the furnace or AC, but in most cases it’s under-depth, settled, or wind-disturbed loose-fill and unsealed air leaks doing the damage. The equipment is working fine, the attic just isn’t holding up its end.

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 Aurora 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.

We start by getting into the attic and measuring actual depth and coverage, not guessing from the hatch. Any air leaks get sealed and eave baffles go in first so airflow from the soffits keeps working, then we recommend cellulose for its dense coverage and borate protection or fiberglass where moisture is a bigger concern, one honest call based on what your attic needs, not a default answer.

 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 Aurora.
03WHAT TO EXPECT

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

A typical Aurora blown-in attic job starts with the inspection and air-sealing, moves into the blow, and wraps with a depth-check across the whole attic, most homes are done in a few hours, start to finish.

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 Aurora

No two Aurora attics price the same. What moves the number is attic square footage, how much depth you need to hit your target R-value, how much air-sealing the attic needs, and whether old, soiled, or hail-compressed insulation has to come out before we blow in new material. You’ll get an itemized quote before we start, not a flat number pulled out of thin air.

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 Aurora. 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 Aurora homes.

★ ★ ★ ★ ★

Our upstairs bedrooms in Southshore used to feel like an oven by 4pm every summer afternoon, and last winter we had ice dams along the whole north side of the roof. Grizzly topped off our attic and sealed the gaps around the can lights, and this summer the upstairs actually stays comfortable without cranking the AC. Our January gas bill was noticeably lower too.

D
David R.
Homeowner, Southshore, Aurora · Blown-In Insulation
05QUESTIONS

Blown-In Insulation in Aurora, Answered Straight

Prefer to just ask?

Call the crew that’s actually going to be in your attic, (303) 854-6221, for a free, no-pressure assessment of what your Aurora home needs.

Blown-in insulation is loose-fill cellulose or fiberglass that’s machine-blown into the attic to a measured, even depth rather than installed as cut panels. In Aurora it’s used almost exclusively on attic floors, over open joists, around obstructions, and into corners batts can’t fully fill. It’s also used to top off older insulation that’s settled or thinned out over the years.

Both perform well when installed to full depth; the right choice depends on your attic. Cellulose packs densely and is borate-treated, which many Original Aurora homeowners like for its coverage in older, irregular attic framing. Fiberglass won’t settle over time and handles minor moisture better, which can matter in attics with bath fan venting nearby. We’ll recommend one based on what we find during the inspection, not a standard answer.

Yes, in most Aurora attics we blow new insulation directly over existing material rather than removing it, as long as what’s there is dry and in reasonable shape. If old insulation is soiled, compressed by hail-damaged roof repairs, or you’ve had a leak, we’ll remove that portion first. Either way, we measure existing depth before adding to it so you land at your target R-value.

Climate Zone 5B, which covers Aurora, calls for an attic R-value of R-49 to R-60, which generally translates to about 14 to 17 inches of cellulose or 16 to 20 inches of fiberglass depending on the product’s coverage chart. We measure to actual depth across the attic, not just at the hatch, since coverage varies a lot in older Aurora homes.

Cellulose settles somewhat after installation, which is why we install it to account for that settling and hit your target depth long-term. Loose-fill of either type can also get pushed around by attic bypass air leaks or wind-washing near soffits, which is why air-sealing and eave baffles matter as much as the insulation itself. A thin or patchy attic after several years is usually a sign it’s time for a top-off, not a defect in the material.

Blown-in wins in attics with irregular framing, existing insulation to top off, or lots of obstructions like ductwork and wiring, which describes most Aurora attics. Batts make more sense in open wall cavities where a consistent cavity depth exists. Spray foam has its place for complex rooflines or conditioned attics, but it costs more and isn’t necessary for a standard vented attic floor, for most Aurora homes, blown-in gets you to code-level R-value for less.

07GET STARTED

Find Out How Much Heat Your Attic Is Losing.

We back every job with a 100% guarantee, so there’s no risk in finding out.

Get Your Free Blown-In Quote

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