Blown In Insulation in San Rafael - Same-Day Service, Done Right the First Time

Fast, Reliable Blown In Insulation Across San Rafael

Blown in insulation in San Rafael typically runs $1,800 to $4,200 for a full attic on a 1,500 to 2,500 square foot home, depending on current R-value and access. Most jobs are done in a single day. If your San Rafael home has drafty rooms, uneven temperatures between floors, or heating bills that climb every winter, the fix is often sitting right above you in the attic. We know San Rafael’s housing stock well: the 1950s Gerstle Park ranchers, the split-levels off Freitas Parkway, and the hillside custom builds off Lucas Valley Road. Each one demands a different approach to insulation. Call (559) 245-9792 for a written estimate before any work begins.

Call (559) 245-9792

Key Takeaways:

• Blown in insulation costs $1,800 to $4,200 for most San Rafael attics; walls run $3 to $6 per square foot of coverage.
• We install Owens Corning, Johns Manville, Knauf, and GreenFiber products, so you can research materials before saying yes.
• Every job includes a written price and a 365-Day Done Right Promise in writing.
• Technicians are background-checked, uniformed, and arrive inside a scheduled window, not a half-day range.

Bryce Holloway leads every San Rafael project personally. That means one accountable person from estimate to final walkthrough, not a rotating cast of subcontractors. Alden Attic Insulation is part of the Garrison Partners family, established 2002, and we operate under The Garrison Standard: written prices, written guarantees, and crews who show up when they say they will.

Why Alden Insulation San Francisco Is San Rafael’s Preferred Blown In Insulation Company

San Rafael homeowners call us because we answer the phone. A live person picks up 24/7, not a voicemail, not a call-back form. When you call (559) 245-9792 about blown in insulation in San Rafael, you talk to someone who can schedule an estimate, answer questions about R-value, and tell you exactly what to expect. That matters in an area where fog rolls in at 7 a.m. and the house won’t hold heat by 9 p.m.

We’ve worked on a lot of the housing stock that defines this city: the post-and-beam hillside builds where exposed beams create thermal bridging, the mid-century ranchers in Gerstle Park with upside-down batts, the split-levels where wall cavities sit empty after decades of settling. The Blown In Insulation team knows that a 1950s San Rafael ranch needs air sealing before any insulation goes in, and that a custom hillside home near Dominican needs material that flows into irregular cavities without demolition.

Every technician who walks into your home is background-checked and in uniform. You’ll know who’s in your attic. And because we’re independently owned and operated, held to The Garrison Standard rather than a franchise playbook, we can make decisions on the spot: adjust a plan, replace a section, fix something we don’t like, without calling a regional office. That’s the discipline San Rafael homeowners tell us they can’t find elsewhere.

Blown In Fiberglass Insulation in San Rafael

Blown In Fiberglass Insulation is the most common type we install in San Rafael, and for good reason: it’s affordable, fast to install, and it flows into the tight spots that plague this city’s older homes. A typical San Rafael attic blown to R-38 runs $1,800 to $3,400, depending on square footage and how much old insulation needs removal first. Fiberglass blown-in settles less than cellulose and holds its R-value longer, which makes it a solid default for the 1950s and 1960s ranchers that dominate neighborhoods like Terra Linda and Santa Venetia.

Air Sealing Before Blowing

In San Rafael, fog is part of life. Without air sealing first, blown-in fiberglass can filter that moisture into wall cavities, where it condenses and feeds mold behind drywall. We seal top plates, recessed can lights, and plumbing penetrations before any insulation goes in. It’s a step cheaper contractors skip, and it’s the difference between an attic that works and one that just holds fluff.

Attic Floor Coverage

Most San Rafael homes have low-clearance attics, especially the ranch-style builds. That means even coverage matters more than total thickness in some spots. We dense-pack or loose-blow to a consistent depth across the entire attic floor, paying attention to the edges over exterior walls, where heat loss concentrates. The result is even temperatures from room to room, including the back bedroom that never quite warms up in January.

Loose Fill Insulation in San Rafael

Loose Fill Insulation is the right call for San Rafael homes where access is tight and wall cavities are empty. Loose fill wall insulation runs $3 to $6 per square foot of covered wall area, and most San Rafael split-levels and hillside homes can be done in one to two days. We typically install loose fill cellulose from GreenFiber or loose fill fiberglass from Johns Manville, depending on the wall assembly and whether there’s existing insulation to work around.

Wall Cavity Retrofits

San Rafael’s 1950s and 1960s construction often went up with little or no wall insulation. Settling over decades leaves upper wall cavities empty, which shows up as cold spots on interior walls during foggy mornings and moisture condensation on drywall. Loose fill reaches those cavities through small drilled holes, filling them completely without opening up the drywall. It’s the least invasive way to fix heat loss you can feel with your hand on the wall.

Dense-Pack for Irregular Framing

Hillside custom homes in San Rafael frequently use post-and-beam construction, which leaves irregular cavities that batts simply can’t fill. Loose fill dense-packed to 3.5 pounds per cubic foot fills every void around beams, braces, and junction boxes. That continuous coverage is the only practical way to break the thermal bridging that makes those beautiful exposed-beam rooms so hard to heat and cool.

Trusted Brands We Service in San Rafael

We install and remove insulation using products from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber. When a San Rafael customer calls us, we walk through the material options in plain language and hand them the actual names so they can look up specs, fire ratings, and R-value per inch on their own before committing. We stock the most common products locally for San Rafael jobs, which shortens turnaround when you have a schedule to keep. If you’ve already researched Owens Corning AttiCat or GreenFiber cellulose and know what you want, we’ll quote that exact product, in writing, before we start.

Common Blown In Insulation Problems We See in San Rafael Homes

• Settling in older hillside wall cavities: Houses built into the San Rafael hills in the 1960s and 1970s often show empty upper wall cavities where old insulation has settled, creating cold spots and condensation on drywall during foggy mornings. We see this most often in homes above Terra Linda and off Lucas Valley Road.
• Compressed fiberglass losing R-value: Ranch homes with low-clearance attics often get used for storage, and that weight compresses blown-in fiberglass, cutting its effective R-value by up to half. If you’re storing boxes on top of your insulation in San Rafael, you’re paying to heat that space.
• Moisture filtering without air sealing: San Rafael’s fog pushes moisture into wall cavities through unsealed top plates and can lights. Blown-in insulation without air sealing first can draw that moisture deeper, leading to hidden mold behind drywall that only surfaces during a remodel.
• Upside-down batt insulation from old remodels: Contractors working on older San Rafael hillside homes often discover batt insulation installed with the vapor barrier facing the wrong direction, trapping moisture against the drywall. If you’re planning a remodel, address this before adding new insulation on top.

Pricing for Blown In Insulation in San Rafael, CA

We Also Serve Cities Near San Rafael

Along with San Rafael, our crews cover Larkspur, Fairfax, Mill Valley, and Hercules. If you’re just over the border in Larkspur or up the hill in Fairfax, we’re already in the area. Dispatch and scheduling run through our San Francisco Bay Area office, so when you call about Blown In Insulation in San Rafael, you’re talking to someone local who can get a crew to you quickly.

FAQs About Blown In Insulation in San Rafael