Blown-In (Loose-Fill)
Fiberglass or cellulose blown in to fill the attic floor and hard-to-reach gaps.
- Fills odd shapes & gaps well
- Great for open attic floors
- Fast to install
- Can settle over time
- Needs the correct installed depth
The right insulation, at the right R-value, installed to even and gap-free coverage — for a home that holds its temperature, costs less to heat and cool, and simply feels more comfortable year-round.
Free on-site estimate · No pressure · We come to you

Why It Matters
Heat moves — up and out of your home in winter, down and in through a hot attic in summer. Insulation is what slows that conductive heat flow, and the attic is the single biggest place it happens. When the attic is properly insulated, your home holds the temperature you set instead of leaking it, so your heating and cooling systems don't have to keep fighting to catch up.
Two things decide whether attic insulation actually delivers: the right amount (a sufficient, even R-value with no thin spots) and a clean, air-sealed surface underneath it. Under-insulated, settled, or gap-riddled insulation quietly costs you comfort and money every season. We assess what you have, seal the leaks, and install the right material to the coverage your attic needs.
Material Options
There's no single best insulation — the right pick depends on your attic, your goals, and your budget. Here's a quick, honest comparison; each links to its own page for the full details.
Fiberglass or cellulose blown in to fill the attic floor and hard-to-reach gaps.
Pre-cut fiberglass or mineral-wool batts fitted between joists and studs.
Recycled paper-based loose-fill — the eco-minded option.
Rigid panels for continuous, high-R coverage in the right assemblies.
Dense stone-wool batts for fire, sound, and moisture resistance.
Expands to air-seal and insulate tricky areas in a single step.
Do You Need It?
Insulation is easy to ignore until it's costing you comfort. These are the tell-tale signs it's due for attention.
Rooms never feel right
Rooms that are cold in winter and hot in summer, or that never seem to hold a set temperature, often trace back to thin or missing attic insulation.
High or climbing bills
When heating and cooling costs keep rising, an under-insulated attic is one of the most common — and most fixable — culprits.
You can see the joists
If insulation sits level with or below your attic floor joists, it's likely below today's recommended levels and due for a top-up.
Rodent-damaged or soiled
Insulation that's been matted, soiled, or nested in by rodents has lost its value and should be removed before new goes in.
Uneven floors & drafts
Big temperature differences between floors, or drafts near the ceiling, point to heat escaping straight through the attic.
Old or never upgraded
Older homes — or ones whose attic has never been addressed — are often running on settled, decades-old insulation.
How We Work
Insulation only performs when it's the right amount, evenly installed, over an air-sealed surface. Here's how we handle every job.
We inspect your existing insulation, coverage, and R-value, plus air leaks, moisture, and any rodent damage — so we know exactly where you stand.
We match the right material — blown-in, batt, foam, rockwool, or cellulose — and a target R-value to your attic, climate, and budget.
If the old insulation is contaminated, wet, or rodent-damaged, we remove and haul it away first, then air-seal gaps and penetrations.
We install the chosen material to a consistent depth and full coverage, fitting neatly around obstructions with no gaps or compression.
We confirm the target coverage, clean up completely, and walk you through the finished attic.

Why Attic Pros
For over 13 years, Bay Area homeowners and businesses have trusted us for insulation — because we recommend the right material for the job (not just the priciest), seal the leaks first, install it properly, and stand behind our work.
Real Customers, Real Results
Tom is a professional and did a very detailed inspection, also gave additional details to prevent in future infestation.
My wife and I found mice droppings in our kitchen cabinet. We reached out to Attic Pros and was connected with Tom. He was very professional and thorough with his inspection. We went through our crawl space and attic. Gave us a full rundown of issues/problems we may be experiencing now and potentially in the future. Thanks for your expertise and quick follow up with the quote and service Tom.
These guys are awesome. Super clear comms to schedule, then received an extremely thorough consultation. We eventually decided to go with them as other shops in the area didn't communicate as well as Attic Pros.
Tom from Attic Pros was great to work with! He was friendly, professional, and thorough during the inspection. He clearly explained everything he found and answered all of my questions. The whole process was straightforward. Thank you, Tom!
Finding out we had a rodent infestation for the first time was incredibly stressful, but Attic Pros made the entire process so much easier! Jeremy was very knowledgeable when help preparing the estimate and the work that needed to be done. Their team that came to perform the work—Nico Otten, Juan Rodriguez, and Antonio Lopez—were amazing from start to finish. Communication was fantastic right from the beginning. The crew was super fast, highly efficient, and left everything very clean after sanitizing our attic, crawl space, and garage. They definitely gave us total peace of mind. They were also able to finish in one day!!
Our small cottage has a very narrow attic entrance. Denis from Attic Pros was willing to try and was able to enter to clean, vacuum, and replace the old insulation. Very professional, access areas were well shielded and protected. Powerful vacuum and clean up well after themselves.
QUESTIONS, ANSWERED
Straight answers to what people actually ask about attic insulation — how much you need, which material to pick, and whether to remove the old first. Still weighing it up? Our team is happy to take a look.
Talk to our team — we're here to help.
(800) 543-0382Explore More
Ready when you are
Tell us how your home feels through the seasons, and we'll assess your attic, recommend the right material and R-value, and give you a clear, no-pressure estimate.
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