Insulation Company in Ontario, CA
Blown in insulation is one of the most effective upgrades for Ontario homes, especially the 1960s through 1980s tract houses where original attic batts have compressed, settled, or blown away entirely after decades of Santa Ana wind events. Hollywood Insulation Co has served Ontario since 2018, installing blown in, attic, and spray foam insulation across the 91764, 91798, 91758, and 91761 ZIP codes. If your cooling bills spike every summer and rooms never feel even, call (866) 605-6949 for a free estimate.
Why Ontario Homes Are Different
Ontario sits at the heart of the Inland Empire’s Santa Ana wind corridor, where dry, hot, dust-laden winds off the Cajon Pass strip insulation and blast attics with heat and debris. That means insulation work here is as much about wind-and-dust resilience and attic sealing against infiltration as it is about R-value. The housing stock reinforces this: mid-century and 1960s-1980s tract homes dominate the older neighborhoods near downtown and along the 91762 and 91764 corridors, while large 1990s-2000s subdivisions stretch through the 91761 growth areas. Many of those older homes still carry original builder-grade R-11 to R-19 attic batts that are now compressed, settling, or missing entirely.
Summer highs routinely push past 100°F, turning under-insulated attics into heat chambers that force air conditioners to run almost continuously. Winter nights cool off sharply, which creates condensation and duct-loss issues in vented attics. Then come the Santa Ana events. In the older tracts near downtown, technicians routinely find attic insulation blown flat or scoured to bare drywall on the windward slope, while the leeward side piles up high. That uneven, wind-driven pattern is something you do not see in sheltered coastal cities, and it changes how we specify and install insulation here.
Our Main Ontario Services
Ontario homeowners call us most about two services: attic insulation in older tract homes losing conditioned air through vented attics, and spray foam in rooms and garages that never hold temperature. Here is how each works in this city.
Attic Insulation in Ontario
Most Ontario attics we inspect are vented, stucco-and-tile constructions where the original fiberglass has thinned out or shifted over 30 to 50 years of wind exposure. We check the windward slope first, because Santa Ana events scour insulation unevenly and leave bare drywall patches that act like open windows in the ceiling. The fix usually involves air sealing the attic floor penetrations, then bringing the entire attic to a consistent depth with the right material for the home’s framing. See the full breakdown at Attic Insulation in Ontario.
Spray Foam Insulation in Ontario
For Ontario rooms that sit directly under tile roofs or above garages, spray foam is often the only method that stops both heat gain and dust infiltration at the source. Icynene open-cell foam works well for interior cavity fills, while Demilec closed-cell systems add a moisture and air barrier that matters during dry, dusty wind events. We walk through the trade-offs for each application, including where foam makes sense financially versus blown-in fiberglass or cellulose. Details are on the Spray Foam Insulation in Ontario page.
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 Ontario
Blown in insulation is the most common retrofit we install in Ontario, because it fills odd-shaped attic cavities and covers uneven existing insulation faster and more completely than batts. In older Ontario tract homes, blown in cellulose or fiberglass can restore R-value across an entire attic in a single day, even when the original material has been wind-scoured or compressed flat. Blown In Insulation is a core specialty of our crew.
Cellulose Insulation
Signs you need it
Your attic insulation looks thin or settled, your ceiling feels warm to the touch in summer, and you notice dust streaks near ceiling vents after Santa Ana events.
What it costs in Ontario
Blown-in cellulose for a typical Ontario attic runs roughly $1.20 to $2.10 per square foot installed, depending on depth and access.
How we do it
We air seal the attic floor, then blow GreenFiber recycled cellulose to the specified R-value across the entire attic, including the windward slope and hard-to-reach eaves.
Blown In Attic Insulation
Signs you need it
Rooms directly under the attic run 5 to 10 degrees warmer than the rest of the house, and your AC short-cycles on hot afternoons without cooling the second floor.
What it costs in Ontario
Blown-in attic insulation in Ontario generally falls between $1.50 and $3.00 per square foot, including removal of badly damaged material where needed.
How we do it
We map the existing insulation depth, remove any wind-scoured or compressed zones, and blow new material to a uniform depth that meets current code minimums.
Blown In Cellulose Insulation
Signs you need it
Your energy bills climb every July and August, and the attic feels dusty or gritty when you go up to check the insulation.
What it costs in Ontario
Blown-in cellulose with air sealing for a 1,200 to 1,800 square foot Ontario attic typically costs $1,800 to $3,800 total.
How we do it
We use GreenFiber cellulose, a recycled-content material that fills tightly around framing and reduces air leakage better than loose fiberglass in most Ontario attics.
What Blown In Insulation Costs in Ontario
| Item | Typical range in Ontario |
|---|---|
| Blown-in cellulose (basic attic top-up) | $1.20 – $2.10 per sq ft |
| Blown-in attic insulation (full install, air sealing) | $1.50 – $3.00 per sq ft |
| Blown-in cellulose with air sealing (1,200 – 1,800 sq ft attic) | $1,800 – $3,800 total |
The main price drivers in Ontario are attic accessibility, how much old material must be removed first, and whether Santa Ana wind damage left bare spots that need additional air sealing before we blow. We give upfront pricing before work starts, so there are no surprise line items after the fact.
Is blown in insulation worth it in Ontario’s heat?
Yes. Ontario attics routinely hit 140°F or more in summer, and blown in insulation at the right depth cuts that heat transfer into living spaces measurably. Most homeowners see lower cooling costs within the first full summer.
Can you install blown in insulation in one day?
In most Ontario homes, yes. A standard single-story attic takes our crew about half a day for removal and prep, then two to four hours to blow the new material to the specified depth. Call (866) 605-6949 to confirm timing for your specific attic.
Brands We Service in Ontario
We carry and install products from eight manufacturer brands across every major insulation category, including Rockwool mineral wool, CertainTeed fiberglass, and Icynene and Demilec spray foam systems. That means the recommendation is based on what your Ontario home actually needs, not whatever happens to be on the truck. See our brands for the full lineup.
Pricing for Insulation Company in Ontario, CA
| Service | Typical range in Ontario |
|---|---|
| Blown-in cellulose (basic attic top-up) | $1.20 – $2.10 per sq ft |
| Blown-in attic insulation (full install, air sealing) | $1.50 – $3.00 per sq ft |
| Blown-in cellulose with air sealing (1,200 – 1,800 sq ft attic) | $1,800 – $3,800 total |
Prices push higher in Ontario when attics have been wind-scoured and need extensive air sealing first, or when access is tight and removal of old, compacted insulation adds labor. The quote we give you before starting is the price you pay – no change orders or hidden fees.
Neighborhoods We Serve in Ontario
We work across all of Ontario, from the older subdivisions near downtown and the 91762 corridor to the newer 1990s and 2000s tracts in the 91761 and 91758 growth areas. Our crews know the windward-slope problem in the mid-century neighborhoods and the thin original insulation common in that era of construction.
- Downtown Ontario and the 91764 historic blocks
- The 91762 corridor and surrounding tract neighborhoods
- Archibald Ranch and the 91761 subdivisions
- North Ontario near the 91758 foothill areas
- The 91798 growth district near the 60 and 15 interchange
We schedule most Ontario jobs within 3 to 5 business days, and we keep crews close enough to handle same-week service when an attic is actively losing conditioned air.
Service Area – Cities Near Ontario
Hollywood Insulation Co also serves homeowners in Montclair, CA, Upland, CA, Chino, CA, and San Antonio Heights, CA. If you are just outside Ontario and need an insulation assessment, we can usually include your home on an existing route through the Inland Empire.
Serving Ontario, CA — Our Local Coverage Area
We’re based in the Ontario 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 Ontario
We schedule most Ontario estimates within 2 to 3 business days, and we can often see homes in the 91764 and 91762 ZIP codes same-week when the need is urgent. Call (866) 605-6949 and we will give you a firm appointment time, not a window.
For most retrofit insulation jobs in Ontario, no permit is required. If your project involves structural changes or the work is part of a larger remodel with open walls, the general contractor usually handles permitting. We can tell you during the estimate whether your specific job falls into either category.
Yes. We work throughout Ontario’s 1990s and 2000s subdivisions, where original attic insulation is often under-specified for current energy codes. Even newer Ontario homes benefit from added blown-in insulation, especially on the wind-exposed upper slopes where Santa Ana events push dust and heat into the attic.
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 30–60 min.
- 4You approve before work beginsNothing starts until you say go.
What Ontario Customers Say
"Plastic laid from the front door to the attic hatch and they vacuumed the hallway afterward."
— Heather Walsh"Attic was at maybe R-11 from the 1970s and blown in over the top would have just buried the problem. They removed the old material, air sealed the top plates and penetrations first, then blew in to R-49. The upstairs is a completely different house in August."
— Cole Sullivan"Found and sealed a gap around the chimney chase that was basically an open chimney to the attic."
— Brandon Wong