★★★★★
"Spray foam in the rim joists of the crawl space. Clean install, and the floors are noticeably warmer."
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Nationwide network of local experts
Insulation Design, Installation
Insulation Design, Installation
& Repair, Nationwide.
Priced Upfront, Built to Last.
Plan it with a local expert, priced upfront, installed by trained crews, and backed nationally. No pressure, no surprises on the bill.
650+ Happy Customers
5.0/5 Rating
Free Estimate on SiteCalls Answered by a Live Person, 24/7Background-Checked TechniciansProudly serving local communities 24+ years
What we do
Expert Insulation Repair and Installation Services
Every job on this list is handled by trained, background-checked technicians working to one national standard, priced upfront from a free estimate.
Attic Insulation
Air-seal the attic floor first, then blow or lay insulation to the code depth for your climate zone. The depth ruler gets photographed before the hatch closes.
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Free Insulation Estimates
A technician measures what you have, tells you the depth you need in inches, and prices the whole job in writing before a bag is opened.
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Crawl Space Encapsulation & Vapor Barrier
A sealed liner up the foundation walls, taped seams, sealed vents and a dehumidifier sized for the space. Cold floors and musty air stop at the source.
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Spray Foam Insulation
Open- or closed-cell foam on rim joists, roof decks and garage ceilings. The one insulation that air-seals and insulates in a single pass.
Learn More →Why us
Why Choose Aspen?
The same four answers in every market we serve.
One Standard, Every Location
Every Aspen team works to the same written standard, the same pricing practice, and the same checklist. The town changes; the job does not.
You Approve the Price First
A free estimate, itemized and in writing, before a tool comes out of the truck. No hourly meter, no discovering the real number at the end.
Licensed, Insured, Background-Checked
Uniformed technicians, licensed for the work in their own state, insured, and background-checked before they ever knock on a door.
Backed by a 365-Day Written Promise
If the work is not right, we come back and make it right. That is the whole promise, and it is on paper, not just on the website.
Our code: The Threshold Standard
The Aspen Way
The standard every Aspen team is held to, on every job, in every town.
Background-check and identity-verify every technician
Send the tech's name and photo before the visit
Show a photo ID badge at the door, every time
Arrive in a clean, marked uniform
Put the price in writing before any work starts
Our Promise, In Writing
The Threshold Verified delivered by Aspen, a proud Threshold Group company.
365-Day Written Promise“Every Threshold technician is background-checked, identity-verified, photo-badged, and sent to you by name and photo before the visit. If anyone arrives who you were not told to expect, that visit is on us and we make it right.”
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Materials we install
Materials That Hold the Line for Decades
Insulation is only as good as the material and the prep underneath it. Here is what we put into an attic, a crawl space or a wall, and what the cheap bid puts in instead.
Blown-In Insulation
Loose-fill is most of what goes into an attic. The material and the depth it is blown to decide whether the attic holds R-38 in ten years or has settled to half of it.
What we install
We blow dense, borate-treated cellulose or premium fiberglass to the full code depth with a depth marker in every bay, over an air-sealed floor. Cellulose settles less than 15% and the borate keeps insects and mold out.
What the cheap bid installs
A cheap bid blows the thinnest bag count that reads "insulated" from the hatch, over a floor nobody sealed. It settles a third within a few winters, and the gaps around every can light and top plate keep leaking conditioned air.
Spray Foam
Closed-cell and open-cell foam are different products for different places. Applying the wrong one, or applying it thin, is the most expensive mistake in the trade.
What we install
We use closed-cell foam where moisture and structure matter: rim joists, roof decks, crawl walls: sprayed in passes to the rated thickness, and open-cell only where its vapor-open behavior is the right call.
What the cheap bid installs
A cheap bid sprays one thin pass of whatever is on the truck, leaves voids behind wiring and plumbing, and puts open-cell against a roof deck where it can trap moisture in the sheathing.
Radiant Barrier
In a hot-climate attic the radiant barrier is what keeps the roof deck from cooking the insulation below it. The foil grade and how it is hung decide whether it works.
What we install
We staple perforated, tear-resistant reflective foil to the underside of the rafters with an air gap on the shiny side, so radiant heat bounces before it reaches the attic floor and moisture can still escape.
What the cheap bid installs
A cheap bid lays a thin foil-faced bubble wrap flat on top of the insulation, where dust kills its reflectivity in a season and it traps moisture against the batts.
Crawl Space Vapor Barrier
The liner is the crawl space job. Thickness, seam treatment and how far it climbs the wall decide whether the moisture reading drops or the liner is a puddle in two years.
What we install
We lay 12- to 20-mil reinforced polyethylene, overlap every seam by a foot and tape it, run it up the foundation wall and mechanically fasten it, then seal the vents so the space can dry.
What the cheap bid installs
A cheap bid rolls out 6-mil builder plastic, leaves the seams loose and stops at the footing. Ground moisture wicks around every edge and the plastic tears the first time anyone crawls on it.
Air Sealing
Insulation slows heat; only air sealing stops the air that carries it. The sealing products used on the attic floor are the difference between a comfortable house and an insulated leaky one.
What we install
We foam every top plate, plumbing and wiring penetration, fit fire-rated covers over recessed lights and gasket the attic hatch before any insulation goes down: the blower-door number proves it.
What the cheap bid installs
A cheap bid skips sealing entirely, or squirts a little foam where it is visible from the hatch, then buries the open can lights and gaps under new insulation where they leak for good.
Our story
Doing It This Way Since 2002.
Aspen Attic Insulation is the insulation company of the Threshold Group family. Even heat and lower bills, from an attic crew you know by name. Every job gets a written price before any work starts and is covered by Threshold Verified. Each location is independently owned and operated.
The aspen holds its warmth high in the mountains. A good name for the people who keep the heat inside your home.
Current Offers
Bring these savings to your next appointment.
10%
10% Off Your First Service Visit
Valid on your first completed service visit with us.
Expires Mar 31, 2027
Always
Written Price Before Any Work Starts
Expires Mar 31, 2027
Included
Written Guarantee on Every Repair
Expires Mar 31, 2027
Free
Free Second Visit if the Repair Fails
Expires Mar 31, 2027
What Our Customers Say
Homeowners in every market we serve, in their own words.
★★★★★
"Before and after photos were sent to my phone. I could see the difference."
★★★★★
"Honest assessment. Told me the walls were fine and the attic was the problem. Saved me money."
★★★★★
"Vetted crew, which I liked. Installed baffles at the eaves so the vents stay clear."
★★★★★
"Quiet crew and a neat attic. Rooms stay even now."
★★★★★
"Blown in cellulose up to R-49 in the attic. Tech badged in at the door and measured the depth with a ruler before and after. Upstairs bedrooms stopped being an oven."
★★★★★
"Removed the old matted insulation and sealed the air leaks around the can lights before putting in new. Utility bill dropped the very next month."
Frequently Asked Questions
Everything you need to know about our insulation services.
Enter your ZIP code in the form at the top of this page, or browse the map. Every pin is a community we serve, and your request goes to the team that covers that area.
Yes. Every technician working under our name is licensed for insulation work in their state, insured, background-checked, and uniformed.
Always. You get an upfront, itemized price and you approve it before anything begins. No hourly surprises, and no discovering the real cost at the end.
Same-day and after-hours appointments are available across our network. Your local team confirms the arrival window when you book.
Yes, in writing. Parts and labor are covered, and if a job isn't right we come back and make it right.
Each location is independently owned and operated, and every one of them is held to the same standard, the same pricing practice, and the same written promise.
Tips & Resources
Insulation guides, maintenance tips, and straight answers from our experts.
Oct 24, 2026
Rockwool Attic Insulation in Los Angeles: A Homeowner’s Guide
Rockwool Attic Insulation in Los Angeles: A Homeowner’s Guide Rockwool attic insulation costs between $2.20 and $4.10 per square foot installed in...
Read More →Oct 23, 2026
5 Mistakes to Avoid With Attic Insulation
5 Mistakes to Avoid With Attic Insulation The five most expensive attic insulation mistakes in Los Angeles aren’t made during installation. They’re...
Read More →Oct 22, 2026
Knauf Attic Insulation in Los Angeles: A Homeowner’s Guide
Knauf Attic Insulation in Los Angeles: A Homeowner’s Guide Knauf attic insulation in Los Angeles, specifically their EcoStar blown-in fiberglass line, is...
Read More →Join our team
Good Work Deserves a Good Place to Do It.
We are hiring technicians, apprentices, and office staff across the country. Real training, real tools, and a company that backs you the same way it backs the customer. If you take pride in doing the job right the first time, you will fit in here.
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Areas We Serve