Insulation Company in Claremont, CA
Blown in insulation solves the biggest problem in Claremont’s older homes: walls and attics that were built before modern insulation existed. Most houses near the Village and the colleges date to the 1910s through the 1950s, when builders used newspaper, rock wool, or nothing at all. North Tustin Insulation has served Claremont since 2011, retrofitting century-old envelopes for real comfort. If your rooms bake in July and freeze in January, call (877) 265-5712 for a free estimate.
Why Claremont Homes Are Different
Claremont sits at the foot of the San Gabriel Mountains, where summer highs push past 95°F and the afternoon sun beats down on attic spaces for hours. Winter mornings near freezing mean the same attic work pays off year round, not just during heat waves. The building stock is older than most of the Inland Empire. Craftsman bungalows and Spanish Colonial Revival homes from the 1910s through the 1930s line the streets near the Village and the Claremont Colleges, while 1950s and 60s ranches fill the surrounding tracts. Many of these houses have never had insulation upgraded since the day they were built.
That age creates a specific challenge. In the older college-area and Village homes, original knob-and-tube wiring buried under attic insulation is a routine discovery. Insulation has to be pulled back and the wiring evaluated before anything gets blown in. The mature eucalyptus and oak canopy that gives Claremont its character also fills gutters and attic vents with leaves, which drives localized moisture and rodent issues that degrade whatever insulation is up there. Retrofitting these homes takes material knowledge and care, not a one-size-fits-all approach.
Our Main Claremont Services
Most Claremont homeowners call us about two things: attic insulation and spray foam. Here’s what each job looks like in this city.
Attic Insulation in Claremont
Attic work in Claremont means dealing with what’s already up there: old fiberglass batts compressed to nothing, rodent damage from leaf-clogged vents, and in older homes, knob-and-tube wiring that must be evaluated before insulation goes down. We air-seal first, then bring attic insulation to the R-value that matches a San Gabriel Valley climate. Blown-in fiberglass from Owens Corning or Johns Manville handles most attics, while Rockwool mineral wool adds non-combustible protection where wiring concerns exist. Learn more on our dedicated Attic Insulation in Claremont page.
Spray Foam Insulation in Claremont
Spray foam earns its keep in Claremont’s older homes because it air-seals and insulates in one pass, which matters when exterior wall changes are limited by historic-district rules near the colleges. We install Icynene open-cell foam for attics and Demilec closed-cell for rim joists, crawl spaces, and walls where moisture resistance matters. This is a specialty method we recommend only where it’s genuinely the right fit, not as a default upsell. See Spray Foam Insulation in Claremont for details.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Blown In Insulation in Claremont
Blown in insulation is the workhorse retrofit for Claremont’s older homes. Most houses built before 1960 have empty wall cavities and attics that were never insulated, or only had a thin layer of newspaper or rock wool that has since settled into almost nothing. Blown in cellulose or fiberglass fills those cavities completely, cutting the air movement that makes upstairs rooms bake in summer and cold drafts creep through interior walls in winter. We match the material to your home, not the other way around. For a full overview of this service, see our Blown In Insulation hub.
Cellulose Insulation
Signs you need it
Rooms that never hold temperature, especially in a 1920s or 30s Claremont home where walls were originally left empty or filled with newspaper.
What it costs in Claremont
Dense-packed cellulose in exterior walls typically runs $1.50 to $3.50 per square foot depending on access and existing insulation.
How we do it
We use GreenFiber recycled cellulose, blown through small access holes into wall cavities at the correct density to resist settling and block air movement.
Blown In Attic Insulation
Signs you need it
Attic insulation that’s compressed, rodent-damaged, or only a few inches deep, and upstairs rooms that run 10 to 15 degrees hotter in summer.
What it costs in Claremont
Blown in attic insulation usually lands between $1.00 and $2.50 per square foot installed, with air-sealing and wiring remediation extra where needed.
How we do it
We remove or repair damaged material, pull back around any knob-and-tube wiring for evaluation, air-seal penetrations, then blow loose-fill fiberglass or cellulose to the full R-value your roof pitch and vents allow.
Blown In Fiberglass Insulation
Signs you need it
An attic with old, settled batts that no longer meet the R-value a San Gabriel Valley home needs for 95°F summers.
What it costs in Claremont
Blown in fiberglass typically costs $1.00 to $2.50 per square foot for attic coverage, plus prep work if the existing insulation must be removed first.
How we do it
We blow Owens Corning or Johns Manville loose-fill fiberglass to an even, code-plus depth, checking vent baffles and soffit airflow as we go so the attic keeps breathing.
What Blown In Insulation Costs in Claremont
| Item | Typical range in Claremont |
|---|---|
| Attic blow-in (fiberglass or cellulose, per sq ft) | $1.00 – $2.50 |
| Dense-pack wall cellulose (per sq ft) | $1.50 – $3.50 |
| Attic air-sealing + blow-in package | $2.50 – $4.50 per sq ft |
Is blown in insulation worth it in an older Claremont home?
Yes. Empty wall cavities and shallow attic insulation are the biggest reasons older Claremont houses feel drafty and run high cooling bills, and blowing in material retrofits those cavities without tearing open walls.
How long does blown in insulation last in Claremont’s climate?
Cellulose and fiberglass both hold their R-value for decades when installed at the right density and kept dry, though Claremont’s leaf-heavy gutters mean attic ventilation must be maintained so moisture doesn’t reach the material. Call (877) 265-5712 for an inspection.
Brands We Service in Claremont
Claremont homeowners don’t get a one-brand pitch from us. We carry Icynene and Demilec spray foam systems, GreenFiber recycled cellulose, and Owens Corning fiberglass, which lets us match material to the house rather than pushing whatever’s on the truck. Parts and materials are sourced through our supply channel for fast turnaround on Claremont jobs. See our brands for the full picture.
Pricing for Insulation Company in Claremont, CA
| Service | Typical range in Claremont |
|---|---|
| Attic air-sealing | $1.00 – $2.50 per sq ft |
| Attic insulation (blown-in fiberglass or cellulose) | $1.00 – $2.50 per sq ft |
| Dense-pack wall cellulose | $1.50 – $3.50 per sq ft |
| Spray foam insulation (open-cell) | $0.50 – $2.00 per board foot |
| Spray foam insulation (closed-cell) | $1.00 – $3.00 per board foot |
| Attic insulation removal | $1.00 – $2.50 per sq ft |
Prices in Claremont push toward the top of these ranges when we’re working around knob-and-tube wiring, repairing rodent damage, or dense-packing walls in historic homes where access is tight. You’ll always get an upfront price before we start, never a surprise change order.
Neighborhoods We Serve in Claremont
We work across the 91711 ZIP code, from the tree-lined streets around the Village to the ranch tracts north of Foothill Boulevard and the hillside streets near the colleges. Our crews know which blocks have knob-and-tube wiring, which attics run shallow, and which yards drop oak leaves into every vent.
- The Village
- Claremont Colleges area
- Rancho San Jose
- North Claremont ranches
- Foothill Boulevard corridor
Most Claremont estimates are scheduled within a few business days, and we batch jobs by neighborhood so we can often fit a small attic in the same week you call.
Service Area – Cities Near Claremont
North Tustin Insulation serves Claremont and the surrounding San Gabriel Valley communities with the same multi-brand approach. We regularly work in Montclair, CA, La Verne, CA, Upland, CA, and San Antonio Heights, CA. If you’re just outside Claremont’s 91711 boundary, give us a call and we’ll confirm coverage for your street.
Serving Claremont, CA — Our Local Coverage Area
We’re based in the Claremont 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 Insulation Company in Claremont
Emergency calls and small attic jobs are often handled within the same week, with most estimates scheduled within a few business days. Call (877) 265-5712 and we’ll give you a realistic time frame for your specific neighborhood.
Most attic and wall insulation retrofits don’t require a city permit, though homes in designated historic districts near the colleges may have additional review for any exterior changes. We’ll confirm the rules for your address before any work starts.
Yes, we cover all of 91711, including the Village, the college area, Rancho San Jose, and the ranch tracts north of Foothill. If you’re uncertain whether your street is in our service area, call us and we’ll check your address right away.
Contact North Tustin Insulation in Claremont
Ready to stop fighting your Claremont home’s temperature swings? Call North Tustin Insulation at (877) 265-5712 for a free estimate. We’ll inspect your attic and walls, identify what’s there now, and give you a straight answer on the right material for your house. No pressure, no one-brand pitch, just the insulation your home actually needs.
What happens when you call
- 1A real person answersNo phone trees — talk to a local insulation pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3A background-checked tech heads outLicensed & insured, typically same-day.
- 4You approve before work beginsNothing starts until you say go.
What Claremont Customers Say
"Spray foam in the rim joists in the basement. The cold floors above them are gone."
— Bethany Ziegler"He did a blower door test before and after and gave me the numbers. I like being able to see the difference rather than being told about it."
— Nathan Padgett"Found and sealed a gap around the chimney chase that was basically an open chimney to the attic."
— Gabriela Herrera