Insulation Company in Claremont, CA
Blown in insulation is the most common service call we handle in Claremont, and for good reason: most homes in 91711 were built between 1950 and 1975 with thin or settling attic insulation, and the Inland Empire heat punishes them every summer. Our crews work with GreenFiber cellulose and Johns Manville fiberglass to bring attic R-values up to what Claremont’s building department expects on remodels. If you’re tired of rooms that bake in August and freeze in December, call us at (855) 798-0822 for a free attic assessment.
Why Claremont Homes Are Different
Claremont sits at the base of the San Gabriel Mountains, which means the houses here face a specific set of insulation problems you won’t find in flatland cities. The summer sun drives attic temperatures into the 130s and 140s, and that heat radiates down into living spaces for hours after sundown. Older homes south of Foothill Boulevard, many of them 1950s ranches and post-war tract builds, still have the original rock wool or a thin layer of loose fiberglass that’s compressed to half its original depth. When we pull the hatch open on those attics, we regularly find citrus and pepper-tree debris that’s worked its way under the eaves, plus knob-and-tube wiring that has to be navigated carefully before any blowing starts. The city of Claremont also enforces energy-efficiency reach codes on permitted remodels, so homeowners here need an insulation contractor who can document R-values and air-sealing well enough to satisfy a plan checker – not just someone who shows up with a blower. That documentation burden is rare in neighboring cities, and it shapes how we approach every Claremont job.
Our Main Claremont Services
Two services generate most of our calls in Claremont: attic insulation and spray foam. Each one solves a different set of problems in this city’s housing stock.
Attic Insulation in Claremont
Attic insulation is the first thing we check in any Claremont home that’s running the AC nonstop. Many 91711 ranches have shallow attic cavities and original framing that limits how much material can be added, but even four to six inches of new insulation makes a measurable difference in upstairs room temperature. We include air-sealing around penetrations because Claremont’s plan checkers look for it. Read the full breakdown of materials, costs, and what to expect on our dedicated page: Attic Insulation in Claremont.
Spray Foam Insulation in Claremont
Spray foam earns its keep in Claremont’s newer two-story homes near the Colleges, where open wall cavities and cathedral ceilings make traditional batts a poor fit. Closed-cell foam also blocks the dry Santa Ana wind from pushing through exterior walls. We install Icynene and Demilec systems here, and the air-sealing they provide matters in a city where permit documentation is aggressive. For specifics on foam types and local pricing, see Spray Foam Insulation in Claremont.
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 fastest, least disruptive way to bring a Claremont attic up to current energy code, and it’s our most-requested service in this city. The 1950s through 1970s homes that dominate 91711 often have no attic insulation beyond a dusty layer of compressed fiberglass, and the triple-digit summer heat sends that heat straight into the house. Blowing in fresh material with the right equipment fills those shallow attic cavities evenly, even around knob-and-tube wiring and odd framing. You can learn more about the full scope of this method on our Blown In Insulation page.
Cellulose Insulation
Signs you need it
Rooms directly under the attic feel ten to fifteen degrees hotter than the rest of the house on summer afternoons, and you can see exposed ceiling joists when you look into the attic.
What it costs in Claremont
Cellulose insulation in Claremont typically runs $1.20 to $1.80 per square foot to install, before any air-sealing work is added.
How we do it
We air-seal obvious penetrations, lay down a grid-marked depth gauge, then blow in GreenFiber cellulose to a consistent R-38 or R-49 across the entire attic floor, keeping it off light fixtures and eave vents.
Blown In Attic Insulation
Signs you need it
Your attic currently has anything less than about six inches of loose material, or the existing insulation is dark, compacted, and no longer fluffy enough to trap air.
What it costs in Claremont
Blown in attic insulation in Claremont generally falls between $1.20 and $1.80 per square foot for the material and labor, depending on depth and access.
How we do it
We run a heavy-duty blower hose up through the attic hatch, direct the material into the far corners first, and work our way back, checking depth with a gauge as we go so every section meets the R-value target.
What Blown In Insulation Costs in Claremont
| Item | Typical range in Claremont |
|---|---|
| Cellulose insulation (installed) | $1.20 – $1.80 per sq ft |
| Blown in fiberglass (installed) | $0.65 – $1.20 per sq ft |
| Loose fill attic insulation (full job) | $1,500 – $2,800 |
Is blown in insulation worth it in Claremont’s heat?
Yes. A proper attic layer to R-38 or R-49 typically drops upstairs rooms eight to twelve degrees on hot afternoons and cuts summer cooling bills noticeably. Claremont’s triple-digit stretches make the payoff faster here than in coastal cities. Call (855) 798-0822 for a reading on your current R-value.
Can you blow insulation around knob-and-tube wiring?
We can, but it requires care. Our crew clears material away from any knob-and-tube runs so the wiring stays ventilated, and we flag any degraded sections before we start. Homes south of Foothill Boulevard often have this wiring. Call us for an attic inspection first.
Brands We Service in Claremont
We install and service insulation from GreenFiber, Owens Corning, Johns Manville, and Knauf in Claremont, with common product lines stocked locally in Ontario for fast turnaround. Our brands page lists the full lineup.
Pricing for Insulation Company in Claremont, CA
| Service | Typical range in Claremont |
|---|---|
| Blown in insulation (cellulose) | $1.20 – $1.80 per sq ft |
| Blown in insulation (fiberglass) | $0.65 – $1.20 per sq ft |
| Loose fill attic insulation (full job) | $1,500 – $2,800 |
| Attic insulation (batt or blown) | $1,500 – $3,500 |
| Spray foam insulation (open-cell) | $2.50 – $4.00 per sq ft |
| Spray foam insulation (closed-cell) | $3.00 – $5.50 per sq ft |
| Rockwool mineral wool insulation | $1.80 – $3.00 per sq ft |
In Claremont, the big factors that push price up are shallow attic cavities that require more careful hose routing, knob-and-tube wiring that must be cleared and flagged, and permit documentation time for remodels. We quote an upfront price after the attic inspection, so the number on the proposal is the number on the invoice.
Neighborhoods We Serve in Claremont
Our crews work all over Claremont, from the tree-lined streets south of Foothill Boulevard up to the newer developments near the Claremont Colleges. Response time for most attic assessments in 91711 is same-week, with emergency calls often handled next day.
- The Claremont Village area
- South of Foothill Boulevard ranches
- Near the Claremont Colleges
- North Claremont hillside streets
- East Claremont along Towne Avenue
Service Area – Cities Near Claremont
Rock Solid Insulation serves all of Claremont and the surrounding foothill and valley cities. Homeowners in Montclair, CA, La Verne, CA, Upland, CA, and San Antonio Heights, CA call us for the same blown-in, attic, and spray foam work, and our Ontario base keeps drive times short across the whole corridor.
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
We schedule most attic assessments in Claremont within two to three business days, and we handle urgent insulation failures like exposed ceilings or pest-damaged attics on a next-day basis whenever possible. Our Ontario shop keeps us inside a 30-minute drive to most of 91711.
Straight insulation replacement usually does not trigger a permit, but any remodel that touches structural or mechanical systems does, and Claremont’s energy reach codes mean the insulation has to be documented to the plan checker’s satisfaction. We provide R-value and air-sealing documentation, which makes the permit process far smoother.
Yes. We handle insulation projects in Claremont’s HOA-governed communities, including the condo and townhome clusters near the Village. We coordinate access windows with property managers and keep work inside typical HOA noise hours, and we’ve completed enough of these to know the drill.
Need attic work planned around a remodel deadline or utility rebate window? Call Rock Solid Insulation at (855) 798-0822 and we’ll schedule a free attic inspection in Claremont, talk through material options, and give you an upfront price.
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 within 60-minute.
- 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."
— Sami Mansour"Work is good and the house is noticeably more comfortable. There was insulation debris left in the hall closet under the attic access that I had to clean up."
— Andres Delgado"Plastic laid from the front door to the attic hatch and they vacuumed the hallway afterward."
— Norma Reyes