Longmont Insulation › Batt Insulation
Batt Insulation in Longmont, CO
In Longmont, Old Town Victorians to Southmoor Park bungalows, converted attic bonus rooms and cold basement walls get batt insulation, cut to fit and sealed at the rim.
- Free wall & floor inspection
- Itemized quote, no pressure
- Xcel rebate guidance
Your Front Range crew
Based in Commerce City, serving Longmont and the metro
Where do your walls and floors stand?
An R-13 or R-21 batt only delivers that number when it’s installed without compression, gaps, or wiring crammed behind the material, sloppy fitting can cut real-world performance dramatically. Longmont sits in Climate Zone 5B, so we install to the wall and floor R-value targets that hold up against foothill wind and St. Vrain Valley winters, not a generic guess.
- Measured during free inspections across Longmont housing stock. Your exact number comes with your assessment.
TRUSTED PRODUCTS & PARTNERS
The Brands Behind Every Grizzly Install
Nothing unlabeled goes into a Longmont wall. We install batts from established manufacturers like Owens Corning, Johns Manville, and CertainTeed, so Old Town and Prospect homeowners alike know exactly what’s behind their drywall.
01THE PROBLEM
The Rooms Batt Insulation Fixes Are the Ones You Avoid.
Old Town Longmont’s Victorians and brick bungalows were built long before cavity insulation was standard, so additions and converted spaces often got skipped entirely. Prospect’s newer builds aren’t exempt either, production schedules can leave a bonus room or garage-adjacent wall thin or unevenly packed. Homeowners near Southmoor Park tell us the same thing: one room just never matches the thermostat setting no matter what they do. Almost always it traces back to missing or poorly-fitted batts in that room’s cavities, not the furnace.
ABonus rooms and offices over the garage
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.
BFinished basements with bare foundation walls
Most Longmont 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. Batts in the new stud walls, with the correct vapor retarder, turn it into comfortable, usable square footage.
CAdditions and pop-tops built to the minimum
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 batts brings the new space up to the same comfort as the original home.
DSound carrying between rooms and floors
Insulation isn’t only about temperature. Batts 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
Fiberglass or Mineral Wool. One Honest Recommendation.
Before we recommend anything, we inspect the cavity, pulling back drywall or checking the basement rim to see what’s actually there. Fiberglass batts cover most Longmont wall and floor work reliably and keep costs reasonable; mineral wool goes in where fire-rated assemblies or serious sound control are the priority, like a shared wall near a home office in Prospect. Each cavity gets one honest recommendation, not a package deal.
03WHAT TO EXPECT
A Half-Day Inside. Here's How It Goes.
Most Longmont batt projects start with a walkthrough of the room in question, an Old Town attic conversion, a Southmoor Park basement, a Prospect addition, and wrap in about half a day since it’s all indoor work unaffected by wind off the foothills. We close with a walkthrough so you see the finished cavities before anything’s covered.
We confirm the plan from your assessment, then protect floors and finishes around the work area.
We clear each bay, check wiring and boxes, and flag where a vapor retarder or fire-rated batt is required by code.
Batts cut to fit every stud, joist, and rafter bay, friction-fit with no gaps or compression, notched neatly around wiring and outlets, and faced the correct way.
Rim joists, top plates, and penetrations sealed so the batts actually deliver their rated R-value.
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 Batt Insulation Costs in Longmont
Pricing on a Longmont batt job depends on the cavity area we’re filling, how much prep work the space needs, and whether air-sealing or removing old insulation is part of the scope. An Old Town Victorian addition and a Prospect basement rarely land at the same number. You’ll get an itemized quote up front, so you know exactly what you’re paying for before work starts.
Cavity area (sq ft)
The floor area we seal and cover
Current R-value
How far each cavity sits below its target R-value
Air-sealing scope
Can lights, chases, and hatch condition
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 Longmont. 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 Longmont homes.
★ ★ ★ ★ ★
Our basement near Southmoor Park was always the coldest room in the house, and the room above our garage wasn't much better. The crew cut the batts tight around our electrical panel and duct work instead of just jamming pieces in, sealed the rim joist, and now both rooms actually hold heat, plus we don't hear the TV from downstairs anymore.
D
David R.
05QUESTIONS
Batt Insulation in Longmont, Answered Straight
Prefer to just ask?
Call (303) 854-6221 and reach the actual Grizzly crew that will show up at your Longmont door, not a dispatcher. The assessment is free, and there’s no pressure to sign anything on the spot.
Batt insulation is precut fiberglass or mineral wool sized for standard stud, joist, and rafter spacing. It’s installed in framed wall cavities, floors above garages or crawlspaces, unfinished basement walls, and additions, any open cavity that needs filling.
Fiberglass is the practical choice for most Longmont walls and floors, affordable and effective when fitted right. Mineral wool costs more but adds fire resistance and stronger sound dampening, which is why we lean on it for shared walls or rooms where noise control matters, like a home office near a busy Old Town street. The right pick depends on the cavity, not a blanket rule.
Usually, yes. Bonus rooms over garages in newer Prospect homes and older Old Town additions alike often have thin, compressed, or missing floor cavity insulation. Fitting new batts snug to the joist bays and sealing the rim area typically resolves the cold spot in a single half-day visit.
Climate Zone 5B, which covers all of Longmont, generally calls for a vapor retarder on the interior side of exterior wall assemblies, and faced batts handle that in one step. We verify the existing assembly first so we’re not creating a double barrier or leaving a gap where moisture can get trapped.
Batts make the most sense in open, accessible cavities, new additions, unfinished basements, floors over garages, where cut-to-fit installation keeps the price down. Blown-in works better for finished walls or irregular attic spaces you can’t open up easily. Spray foam earns its cost in rim joists and hard-to-seal gaps where air-sealing matters as much as insulation value.
Yes, properly fitted batts, especially mineral wool, cut down sound transfer noticeably between rooms and floors. It’s not full soundproofing, but Longmont homeowners near busy Old Town blocks or Prospect’s tighter lot spacing consistently notice quieter rooms once the cavities are filled instead of left empty.
06EVERY COMMUNITY WE SERVE
Batt Insulation Near Longmont
LongmontArvadaAuroraBoulderBrightonBroomfieldCastle RockCentennialColorado SpringsCommerce CityDenverEnglewoodFort CollinsGoldenGreeleyHighlands RanchLafayetteLakewoodLittletonParkerWestminster
07GET STARTED
Find Out Which Rooms Are Costing You.
Every batt job comes with our 100% guarantee, so you’re never guessing.
- (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 Longmont
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