Fast, Reliable Blown In Insulation Across Millbrae
Blown in insulation in Millbrae runs $1,800 to $4,200 for a typical 1,200 to 2,000 square foot home, depending on current R-value, square footage, and whether crawl spaces or walls need work too. Most jobs take one day, and we get to Millbrae homes within 24 to 48 hours of your call. If your living room feels cold near the floor even with the heat on high, or you’ve noticed a musty smell coming from the crawl space, that’s the fog and ocean air doing what it does to older Millbrae homes. Call (559) 245-9792 and we’ll give you a written price before any work starts.
Our crews work throughout Millbrae, from the flats near Broadway to the hillside streets above El Camino Real. We know the housing stock here, and we know what the persistent fog does to insulation that was installed forty or fifty years ago. You don’t need a generic contractor. You need someone who understands Millbrae’s specific problem: moisture, not just temperature.
Why Alden Insulation San Francisco Is Millbrae’s Preferred Blown In Insulation Company
Millbrae homeowners keep calling us for one reason: we show up when we say we will, and the price we quote is the price you pay. No revisions at the door. Alden Insulation San Francisco is part of the Garrison Partners family, established 2002, and every job is held to The Garrison Standard. That means written prices, written guarantees, and a background-checked, uniformed technician inside your scheduled window. Not a four-hour range. A window we actually hit.
Bryce Holloway runs our operation, and he holds crews to a simple rule: leave the house cleaner than you found it. Millbrae customers tell us the same thing consistently – the technician explained the R-value math, showed them the degraded batts we pulled out, and didn’t push them into anything they didn’t need. That’s the whole job. Do the work, explain it plainly, stand behind it.
When you call (559) 245-9792, a live person answers. Not a voicemail, not a form. Twenty-four seven. If you’ve got a crawl space filling with fog-damp air in Lomita Park, you talk to a human being who can get a crew scheduled.
Loose Fill Insulation in Millbrae
Loose Fill Insulation in Millbrae is the work we do most often in attics and under floors where the original fiberglass has settled, matted, or absorbed moisture. The job involves blowing loose-fill material – usually fiberglass from Owens Corning or GreenFiber cellulose – into the attic cavity or between floor joists to restore R-value. In Millbrae, this typically runs $1,800 to $3,400 for an attic, and $2,500 to $4,200 when we’re also working under floors in vented crawl spaces.
Attic Loose Fill Over Degraded Batts
Most Millbrae homes built between the 1940s and 1970s still have the original fiberglass batts in the attic. After decades of fog-laden air, those batts compress and lose more than half their R-value. We vacuum out the failed material and blow in fresh loose fill to R-38 or R-60, depending on what the home needs. The difference in furnace runtime is noticeable within the first week.
Crawl Space Loose Fill With Vapor Barrier
In hillside homes around Mills Estates and Lomita Park, the bigger problem is under the floor. Cold, damp air moves through vented crawl spaces, chilling the floorboards and carrying moisture into the joists. We seal the vents with vapor barrier, remove the old material, and blow in loose fill that won’t hold water the way fiberglass batts do. This is the fix for a living room that never feels warm no matter what the thermostat says.
Blown In Insulation Contractors in Millbrae
Blown In Insulation Contractors in Millbrae don’t all do the same work, and that’s worth knowing before you hire. We specialize in blown-in applications: attics, crawl spaces, and wall cavities in existing homes. The job in Millbrae typically costs $2,200 to $4,200 depending on access, square footage, and whether we’re addressing moisture issues alongside insulation. We use Owens Corning AttiCat, GreenFiber, and Icynene open-cell foam for specific applications where air sealing is the priority.
Whole-Home Air Sealing Before Insulation
Blowing insulation into a leaky house is like filling a bucket with a hole in it. Before we blow anything, we seal the gaps: around recessed lights, plumbing penetrations, attic hatches, and top plates. In Millbrae’s older split-levels and ranchers, air leakage through the attic floor is often the bigger heat-loss problem than the insulation itself. Sealing first, then insulating, is the order that actually works.
Wall Cavity Blown-In for 1940s – 1970s Homes
Many Millbrae homes from this era have empty or near-empty wall cavities. The original construction predates code requirements for wall insulation. We drill small access holes, blow in dense-pack cellulose or fiberglass, and patch them cleanly. It’s the single biggest comfort upgrade for rooms that face the fog side of the house and never hold heat.
Trusted Brands We Service in Millbrae
We install and remove insulation using products from Owens Corning, GreenFiber, and Icynene, so you can research exactly what’s going into your attic before you say yes. Owens Corning AttiCat is our default for attic loose fill in Millbrae. GreenFiber cellulose works well for wall cavities and sound control. Icynene open-cell foam is the choice when we need to air seal and insulate in one pass, especially in unconditioned crawl spaces. We keep common materials stocked locally, which is why most Millbrae jobs get done within a day or two of the quote, not two weeks later.
Common Blown In Insulation Problems We See in Millbrae Homes
- Fog-degraded fiberglass batts in vented crawl spaces. Open crawl space vents let ocean air circulate under the house year-round. The fiberglass absorbs moisture, mats down, and loses its R-value within a decade or so. We see this constantly in Lomita Park and Mills Estates, where the floor above feels cold even mid-summer.
- Blown-in insulation installed without a vapor barrier. This is the worst offender in hillside homes. Loose fill traps damp air against floor joists, accelerating rust and feeding mold. The fix is removing it, sealing the vents, and reinstalling with proper vapor management.
- Sweating ductwork under attic insulation. In Millbrae’s 1940s – 1970s homes, the air handler often sits in an unconditioned space. Once the attic is insulated, the ducts get colder, humidity condenses on the galvanized steel, and the ducts rust from the outside in. Proper air sealing and insulation placement stops the condensation loop.
- Settled attic insulation from old roof leaks. Many Millbrae homes have had at least one roof repair over the decades. Water-intrusion stains and settled, crusty insulation in those spots tell the story. We remove contaminated material and blow in fresh fill at full depth.
Pricing for Blown In Insulation in Millbrae, CA
Here’s what you should expect to pay for blown in insulation in Millbrae. An attic-only job in a 1,200 to 1,600 square foot rancher runs $1,800 to $2,800. A larger split-level with crawl space work underneath runs $3,000 to $4,200. Wall cavity dense-pack in a typical three-bedroom home adds $1,500 to $2,500 depending on how many exterior walls need work. The variables are square footage, current R-value, access to the crawl space, and whether old material needs removal first. Every quote is written and itemized before a single tool comes off the truck. Call (559) 245-9792 for a free estimate, and the number we hand you is the number on the invoice.
We Also Serve Cities Near Millbrae
Our crews cover the whole peninsula, including Millbrae and the surrounding communities. If you’re in Burlingame, South San Francisco, Pacifica, or San Mateo, we can typically schedule within the same week. The same written pricing, the same guarantee, the same background-checked crew. You get the full Blown In Insulation process we run everywhere we work.
Serving Millbrae, CA - Our Local Coverage Area
We’re based in the Millbrae area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Blown In Insulation in Millbrae
It’s almost always a vented crawl space. Cold, damp ocean air moves under the house, chills the floorboards, and any insulation under there has likely absorbed moisture and matted down. The fix is sealing the crawl space vents with vapor barrier, removing the failed material, and blowing in fresh insulation that fills the joist cavities completely. Call (559) 245-9792 and we’ll inspect it – estimates are free.
Yes, when the smell is coming from a damp crawl space. The odor is usually from degraded fiberglass batts holding moisture against wood joists. We remove the contaminated material, seal the vents, treat any surface mold, and blow in fresh insulation. The musty smell typically clears within a day or two once the moisture source stops.
Look for three signs: rooms that never hold heat despite running the furnace, a persistent damp or musty smell near the floor, and condensation on windows or ductwork in summer. If your home was built between the 1940s and 1970s and still has original insulation, the fog has almost certainly degraded it. We’ll remove a small section and show you exactly what we find before we quote the fix.
Yes, but only if it’s installed correctly. In Millbrae’s older homes, the air handler often sits in an unconditioned space, and adding attic insulation without air sealing can actually make duct condensation worse. The right sequence is air sealing first, then insulation placed so the ducts don’t sit in a cold zone against humid outside air. We check this on every quote.
In Millbrae, yes. The fog and ocean air make vapor management the whole ballgame. Without a vapor barrier, blown-in insulation under the floor traps moisture against the joists and accelerates rust and mold. We seal crawl space vents and install a vapor barrier as part of every under-floor insulation job in Lomita Park, Mills Estates, and the surrounding hillside neighborhoods. Get an exact quote at (559) 245-9792.
Written by Bryce Holloway, Owner at Alden Insulation San Francisco, serving Millbrae and the Bay Area since 2002.