Insulation Company in Los Angeles, CA
Blown in insulation is the workhorse retrofit for Los Angeles homes built between the 1920s and 1950s, where original attic insulation is often compressed, contaminated, or gone entirely. In this cooling-dominated climate, the real job is blocking radiant heat from the roof and sealing the gaps that let cooled air escape through knob-and-tube-era framing. Fontana Insulation has served Los Angeles since 2011, and we stock eight brands so the material recommendation matches your house, not our inventory. Call (866) 271-1602 for a free estimate.
Why Los Angeles Homes Are Different
Los Angeles flips the national insulation script. Most of the country insulates to keep heat in. Here, the priority is keeping solar heat out of the attic and conditioned air inside the living space. In ZIP codes like 90005, 90006, 90007, and 90008, the housing stock runs heavily to 1920s-1950s bungalows and Craftsman-style homes, plus older low-rise multi-family buildings. These structures were framed before modern air sealing existed. Wall cavities are often unsealed. Attic floors show decades of ad-hoc remodeling: old cellulose matted down flat, fiberglass batts shoved aside during roof repairs, sections missing entirely after a rewire or a plumbing chase.
The climate compounds it. Attic temperatures in a Los Angeles summer can climb past 140 degrees with intense, day-long solar exposure on asphalt shingle or composition roofs. That radiant heat pushes down through the ceiling into living space, and the air conditioner runs longer to fight it. Radiant barrier, proper ceiling insulation depth, and attic ventilation are the actual levers here. Heating loss in the mild winter barely registers by comparison. When our technicians open up an attic in South LA or central LA, the first step is usually clearing out the old material and sealing the bypasses before any new insulation goes in. Cold-climate retrofit crews simply do not see this pattern the way we do here every week.
Our Main Los Angeles Services
Los Angeles homeowners call us most about two things: attics that cook the upstairs and older homes that leak air through every gap. Both have dedicated pages below.
Attic Insulation in Los Angeles
Attic work in Los Angeles starts with the thermal boundary. In these older bungalows, we usually find R-19 or less up there, often disturbed or degraded. The job combines air sealing at top plates and penetrations, then installing new material to hit the R-value target for our climate zone. We carry fiberglass from CertainTeed and Owens Corning, mineral wool from Rockwool, and cellulose from GreenFiber, so the material choice follows the condition of the attic, the presence of old wiring, and the homeowner’s fire-resistance priorities. Full details are on Attic Insulation in Los Angeles.
Spray Foam Insulation in Los Angeles
Spray foam earns its place in LA’s older stock where air leaks are the dominant problem. Open-cell foam applied at the roofline can turn a vented, superheated attic into a conditioned space, which matters in homes where ductwork runs through the attic and loses cooled air into 140-degree heat. We install Icynene and Demilec open- and closed-cell foam, both performance-tested brands, and closed-cell makes sense in areas where moisture or structural reinforcement is a factor. See Spray Foam Insulation in Los Angeles for the full scope.
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 Los Angeles
Blown in insulation is the most practical retrofit for the 1920s-1950s attics that dominate Los Angeles ZIP codes like 90005 through 90008. These homes were built when attic insulation, if it existed at all, was a thin layer of rock wool or vermiculite, and decades of roof work, rewiring, and rodent activity have left it compressed, contaminated, or missing in sections. Blown material solves the geometry problem: it fills irregular joist bays, flows around obstructions, and reaches the tight spots that batts cannot. Before we blow anything in, though, we clear the old material and air seal the ceiling plane. In a cooling-dominated market, sealing the gaps matters as much as the R-value above them. Our full service line is described at Blown In Insulation.
Cellulose Insulation
Signs you need it
Your attic has old, settled material that is no longer at effective depth, or you want insulation made from recycled content without giving up fire resistance.
What it costs in Los Angeles
Blown cellulose in a standard Los Angeles attic runs $1.50 to $3.00 per square foot installed, depending on depth and access.
How we do it
We prep the attic, air seal the penetrations, then dense-pack or loose-fill GreenFiber cellulose to the R-value target for our climate zone.
Blown In Attic Insulation
Signs you need it
Rooms under the attic run noticeably hotter than the rest of the house in summer, or your attic floor shows bare spots and trampled-down old material.
What it costs in Los Angeles
Blown in attic insulation in Los Angeles typically falls between $0.95 and $2.10 per square foot for fiberglass loose fill, including basic prep.
How we do it
We vacuum out the old layer where needed, seal the top plates and light fixtures, then blow the new material to an even depth across the full attic floor.
Blown In Fiberglass Insulation
Signs you need it
You want a cost-effective loose-fill material that will not settle as much as older cellulose, and you prefer a brand with a strong warranty.
What it costs in Los Angeles
Blown fiberglass runs on the lower end of the loose-fill range, typically $0.95 to $2.10 per square foot installed in LA attics.
How we do it
We use Knauf or CertainTeed blown fiberglass, installed with calibrated equipment to hit the specified R-value without gaps or thin spots.
What Blown In Insulation Costs in Los Angeles
| Item | Typical range in Los Angeles |
|---|---|
| Blown fiberglass loose fill (per sq ft) | $0.95 – $2.10 |
| Blown cellulose (per sq ft) | $1.50 – $3.00 |
| Old insulation removal and air sealing prep | Added to material cost based on attic condition |
Is blown in insulation worth it in Los Angeles?
Yes, especially in older bungalows where attic insulation is thin or gone. It blocks radiant heat gain and keeps cooled air inside, which reduces cooling load through July, August, and September. Call (866) 271-1602 for an exact quote based on your attic’s current condition.
Can you blow in insulation over existing material in a Los Angeles attic?
Sometimes, but not always. If the old layer is dry, uncontaminated, and not compressed, we can blow over it. If it is matted, rodent-soiled, or full of roof debris, it needs to come out first. We inspect before recommending either path.
Brands We Service in Los Angeles
Fontana Insulation carries Knauf and CertainTeed fiberglass, Rockwool mineral wool, and Icynene spray foam, across eight nationally recognized brands in four material categories. That means we are not brand-loyal; we match the material to your attic, walls, or crawlspace. Parts and materials are stocked locally for Los Angeles jobs, which keeps turnaround short. See our brands for the full lineup.
Pricing for Insulation Company in Los Angeles, CA
| Service | Typical range in Los Angeles |
|---|---|
| Blown fiberglass attic insulation (per sq ft) | $0.95 – $2.10 |
| Blown cellulose attic insulation (per sq ft) | $1.50 – $3.00 |
| Spray foam – open cell (per board foot) | $0.75 – $1.50 |
| Spray foam – closed cell (per board foot) | $1.25 – $2.50 |
| Fiberglass batt insulation (per sq ft) | $0.90 – $1.80 |
| Mineral wool batt insulation (per sq ft) | $1.80 – $3.50 |
| Air sealing as part of attic retrofit | $0.30 – $0.60 per sq ft |
| Old insulation removal | $1.00 – $2.50 per sq ft |
What pushes price up in Los Angeles is almost always the condition of the attic before we start: compressed old material, rodent contamination, knob-and-tube wiring that must be worked around, and roof leaks that need correction first. We quote the full scope upfront so there are no surprises after we open the attic.
Neighborhoods We Serve in Los Angeles
We work throughout the South LA and central LA corridor, from the bungalow rows of West Adams to the Craftsman blocks of Jefferson Park and the older multi-family stock near Koreatown. Response time across the area is typically same-week for estimates and scheduling.
- West Adams
- Jefferson Park
- Leimert Park
- Arlington Heights
- Westlake
Service Area – Cities Near Los Angeles
Our Los Angeles crews also cover the surrounding neighborhoods and nearby communities, including Koreatown, CA, Echo Park, CA, Silver Lake, CA, and Hollywood, CA. If you are just outside the central LA area, call us and we will confirm coverage for your street.
Serving Los Angeles, CA — Our Local Coverage Area
We’re based in the Los Angeles 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 Los Angeles
We schedule estimates across Los Angeles within the same week in most cases, and emergency attic issues where a roof leak has soaked the insulation can often be seen faster. Call (866) 271-1602 and we will give you a firm appointment time, not a four-hour window.
Most retrofit insulation work in Los Angeles does not require a permit on its own, but if the job is part of a larger remodel with structural changes, the general permit may cover it. We can tell you what applies to your specific project during the estimate.
Yes. Older bungalows in South LA and central LA frequently still have active knob-and-tube circuits in the attic. We coordinate with your electrician where needed and never bury live wiring under new insulation, which is both a code concern and a fire risk.
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 1-hour.
- 4You approve before work beginsNothing starts until you say go.
What Los Angeles Customers Say
"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."
— Holly Mercer"Found and sealed a gap around the chimney chase that was basically an open chimney to the attic."
— Nadia Aziz"Installed baffles at the soffits so the new insulation didn't block the ventilation, which the previous contractor apparently never considered."
— Michelle Bennett