Owens Corning Blown In Insulation in San Francisco: What to Know First
Owens Corning blown in insulation in San Francisco usually means one of two jobs: topping up an attic that has settled below its original R-value, or removing old material and starting fresh. We’re an independent Owens Corning service provider, not a factory-authorized dealer, and we install and remove blown in insulation using Owens Corning’s AttiCat and ProPink fiberglass lines alongside other brands we trust. Most jobs run one to two days from assessment to cleanup, and the written price lands before any work starts.
This page is for homeowners who already have Owens Corning insulation in their attic and want to know if it’s still doing its job, what it costs to add more, and who in San Francisco actually shows up. If you’re in that spot, call (559) 245-9792 and a person answers, day or night.
How Owens Corning Products Fail – and How We Fix Them
Blown in insulation doesn’t break the way a furnace breaks. It degrades slowly, and by the time you notice a cold bedroom or a heating bill that won’t quit, the attic has usually been under-insulated for years. Here’s what we find on Owens Corning jobs in San Francisco:
- AttiCat Pink Fiberglas settling below R-value. Owens Corning’s AttiCat system is designed to resist settling, but no blown fiberglass holds its loft forever in San Francisco’s damp air. We regularly measure 10 to 12 inches of material in Sunset District attics that originally tested at R-38 or higher. The fix is a measured top-up using attic rulers, not guesswork, so the final R-value is verifiable.
- ProPink L77 compressed by storage or foot traffic. When homeowners use the attic for boxes or holiday decorations, blown in insulation gets compressed. Fiberglass loses R-value per inch when it’s packed down. We document the compressed zones, fluff what’s salvageable, and blow fresh material to bring the whole plane back to spec.
- Moisture intrusion along the marine layer. San Francisco’s fog doesn’t stay outside. Attics in the Richmond and Sunset Districts pull moist air through can lights, bath fan housings, and unsealed top plates. Wet fiberglass loses thermal performance fast. We identify the air-leak source before adding insulation, because blowing new material over a moisture problem just buries it.
- Batts laid over loose-fill by a previous contractor. We see this often: someone installed fiberglass batts directly on top of Owens Corning loose-fill. That layering traps moisture and reduces airflow, and it usually means the attic was never properly air sealed. We remove the mixed materials and start clean so the R-value math actually works.
- Rodent activity in older Victorian attics. Blown in fiberglass tunnels easily through rodent paths. In Noe Valley and the Mission, older Victorian framing leaves gaps that rodents use to move from soffit to attic. We remove contaminated material, identify entry points, and install fresh Owens Corning blown in insulation only after the openings are addressed.
Our Owens Corning Blown In Insulation Process
Every job follows the same sequence. You know what’s happening at each step, and the price doesn’t move unless the scope changes and you approve it first.
- 1
Attic inspection. We measure existing depth, check for moisture, look for air leaks, and document what’s actually up there. You get the findings straight, with photos.
- 2
Air sealing assessment. Before any new insulation goes in, we check top plates, can lights, bath fans, and plumbing penetrations. San Francisco attics leak air aggressively, and insulation can’t do its job if the air is moving through it.
- 3
Written price. You approve a number before tools come off the truck. That number covers the work we said we’d do. Nothing gets added at the invoice.
- 4
Removal if needed. When old material is wet, rodent-damaged, or too compressed to salvage, we vacuum it out completely. Then we prep the attic floor.
- 5
Blown in installation. We install Owens Corning AttiCat or ProPink blown in fiberglass to the agreed depth, measured with attic rulers at multiple points so the R-value is real, not aspirational.
- 6
Cleanup and verification. We leave the attic access clean, walk you through what was done, and provide the written 365-Day Done Right Promise. If anything fails within a year, we return at no charge.
What Owens Corning Blown In Insulation Costs in San Francisco
Most Owens Corning blown in insulation projects in San Francisco run $1,800 to $4,200 depending on square footage, current R-value, and whether old material needs removal first. A simple top-up on an 800-square-foot attic typically lands around $1,500 to $2,300. Full removal and reinstall on the same footprint runs $2,800 to $4,200.
- Top-up only: $1,500 – $2,300
- Removal and reinstall: $2,800 – $4,200
- Air sealing add-on: $400 – $900 depending on penetrations
- Attic access improvement: $150 – $500 when the hatch needs weatherstripping or a dam
What moves the price: attic height and accessibility, how much old material has to come out, and whether we’re air sealing before we blow. Call (559) 245-9792 for an exact number. The estimate is free, and the written price is the price.
Why San Francisco Homeowners Call Alden Insulation San Francisco for Owens Corning Work
We’re part of the Garrison Partners family, established 2002, and we operate under The Garrison Standard: written prices, written guarantees, background-checked uniformed technicians, and a live person answering the phone 24/7. That’s not a sales pitch. It’s how every job runs.
Bryce Holloway grew up in Los Angeles and learned the trade at Los Angeles Trade-Technical College before spending two decades working insulation jobs from crawl spaces to cathedral ceilings. He’s spent a good stretch of that time on older Victorian and Edwardian homes in San Francisco, especially in the Sunset District where the coastal fog fights thermal performance every day. His crew knows Owens Corning materials cold, and they’ll tell you straight when the attic just needs a top-up and not a full reinstall.
Alongside Owens Corning, we install Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber. We also service Reflectix radiant barrier. If a product isn’t available, we have options, and you can research every one of them before saying yes.
FAQs
Will adding Owens Corning blown in insulation void my existing warranty? No. Owens Corning’s product warranties cover material defects, not installation. An independent contractor can add or remove blown in insulation without affecting the manufacturer warranty on the material itself. We document the work so you have a record if you ever file a claim.
Can you match Owens Corning blown in insulation to my existing R-value? Yes. We measure the current depth and density, calculate the existing R-value, and blow additional material to bring the attic to the level you want. Attic rulers placed throughout verify the final number. No guessing.
How fast can you do a blown in insulation job in San Francisco? Most residential attics take one to two days including setup, installation, and cleanup. Larger attics with removal can run three days. Call (559) 245-9792 and we’ll give you a straight answer on timing for your specific home.
Is it cheaper to top up Owens Corning insulation or remove and replace it? Topping up is always cheaper unless the existing material is wet, compressed beyond recovery, or rodent-damaged. We’ll tell you which applies to your attic, and we won’t recommend removal if a measured top-up does the job.
Do you service Owens Corning blown in insulation in all San Francisco neighborhoods? We cover the full city, from the Sunset and Richmond to Noe Valley, the Mission, Bernal Heights, and everywhere in between. San Francisco traffic is what it is, but the scheduled window is the scheduled window.
Good insulation doesn’t announce itself. You just stop noticing the cold.
Written by Bryce Holloway, Owner, Alden Insulation San Francisco at Alden Insulation San Francisco, serving San Francisco and nearby areas.
Ready to get your Owens Corning blown in insulation assessed? Call (559) 245-9792 for a free estimate. A live person answers 24/7.