★★★★★
"Spray foam in the rim joist. Floors above are warmer."
365-Day Done Right PromiseLearn More
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.
575+ 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.
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Why Choose Alden?
The same four answers in every market we serve.
One Standard, Every Location
Every Alden 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 Garrison Code
The Alden Way
The standard every Alden team is held to, on every job, in every town.
Show up inside the window we gave
Price in writing before any work starts
Do it by the book, the first time
Leave the site clean and squared away
Stand behind the work for a full year
Our Promise, In Writing
The Garrison Standard delivered by Alden, a proud Garrison Partners company.
365-Day Written Promise“Every Garrison company works to the same standard: we arrive inside the window we gave you, put the price in writing before any work starts, do the job by the book, and leave the site clean. The work is guaranteed in writing for a full year, and if it fails in that time we come back and make it right at no charge.”
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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.
Alden Attic Insulation is the insulation company of the Garrison Partners family. Keep the heat right where you want it. Every job gets a written price before any work starts and is covered by The Garrison Standard. Each location is independently owned and operated.
Alden is a steady old surname that sounds like warmth and shelter, which is exactly what good insulation gives you.
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.
★★★★★
"Tidy crew. Vacuumed the hall and covered the hatch."
★★★★★
"Clear estimate with R-value listed. No hidden extras."
★★★★★
"Pulled up the old insulation and bagged it neatly. No dust in the house."
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 9, 2026
Rockwool Attic Insulation in Los Angeles: A Homeowner’s Guide
Rockwool Attic Insulation in Los Angeles: A Homeowner’s Guide Rockwool attic insulation in Los Angeles typically costs $1.10 to $1.60 per square...
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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Protected territories, real training, national brand backing, and systems that are already working in towns like yours. Territories are open now.
Areas We Serve