Blown-In Insulation in Fort Collins, CO
Top up a thin attic or retrofit closed wall cavities with blown-in cellulose or fiberglass — a cost-effective way to boost R-value and even out temperatures.
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What is blown-in insulation?
Blown-in (or loose-fill) insulation is installed by machine, blowing a stream of cellulose or fiberglass fibers into attic floors or closed wall cavities. Because it is loose and flowing, it fills around joists, wiring, and irregular spaces without the gaps that batts can leave behind. We install two materials. Cellulose is made from recycled paper treated with borate for fire and pest resistance; it is dense, settles into cavities well, and is an excellent choice for retrofitting older attics and walls. Fiberglass loose-fill is lightweight, does not settle as much over time, and is a popular choice for topping up existing attic insulation to a modern R-value. Blown-in is ideal when your attic insulation is low or uneven, when rooms are cold, or when energy bills are climbing — common signs that your home is under-insulated by today's standards. It is one of the most cost-effective upgrades you can make, and when paired with air sealing it dramatically improves comfort and cuts heating and cooling costs across Northern Colorado's wide temperature swings.
Benefits of blown-in insulation
Eco-friendly materials
Cellulose is made from recycled content; fiberglass is recyclable.
Fills every gap
Loose-fill flows around joists, wiring, and irregular cavities.
Boosts R-value fast
Brings thin, settled attics up to modern recommended levels.
Even temperatures
Reduces cold rooms and second-floor hot spots.
Fire & pest resistant
Cellulose is borate-treated for fire and insect resistance.
When you need blown-in insulation
- Low or uneven attic insulation
- Cold rooms or drafty second floors
- High heating or cooling bills
- Older homes with settled fiberglass
- Retrofitting closed wall cavities
- Topping up attic insulation to modern R-value
Cellulose vs. fiberglass blown-in
Our process for blown-in insulation
Free attic inspection
We measure existing R-value, check for bypasses, and assess access.
Air sealing (recommended)
We seal top plates, penetrations, and the hatch before insulating.
Protect & prep
We lay protection and set up our blowing equipment.
Blow insulation
We blow cellulose or fiberglass to the target R-value, evenly across the attic.
Clean up & review
We clean the workspace and walk you through the finished work.
Blown-In Insulation project gallery
Real blown-in insulation work from our crew across Fort Collins and Northern Colorado.
Attic blown-in cellulose deep thermal fill
Closed-cell spray foam wall cavity insulation
Attic rafter wall spray foam air & moisture barrier
Precision wood stud batt insulation installation
Commercial custom ceiling insulation project
What our customers say
"Highly recommend. Best spray foam company I've used. Showed up when they said they would. Did what they said they would. Will be using again."
"Everflow insulated our home in Fort Collins. The temperature difference on our second floor was night and day within 24 hours. Super clean crew and courteous owners!"
"Professional, punctual, and extremely knowledgeable. They explained the difference between closed-cell and open-cell spray foam and saved us a bundle on our garage remodel."
Blown-In Insulation FAQ
Blown-In Insulation from Everflow Spray Foam
Family-owned · Commercial-grade equipment · Top-tier materials
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Areas we serve
Blown-in across Northern Colorado and Southern Wyoming. Click your area to learn how we serve it.
Get a free blown-in insulation quote
Free, no-obligation estimate from your local Fort Collins blown-in insulation experts.