Insulation Company in Hollywood, CA
Blown in insulation is the workhorse of Hollywood retrofits, and it’s the service we perform most often in this city. Most Hollywood homes were built between 1920 and 1950, before insulation was standard, and their walls and attics were framed for a different era. The mild coastal climate means the real problem isn’t bitter cold; it’s radiant heat gain through uninsulated attics in summer and air leakage through old lath-and-plaster walls year round. Hollywood Insulation Co has served Hollywood since 2018, matching blown-in cellulose, fiberglass, and loose fill to the specific cavities these old bungalows and courtyard fourplexes actually have. Call (866) 605-6949 for a free estimate.
Why Hollywood Homes Are Different
Hollywood’s flats hold some of the oldest housing stock in Los Angeles. The 1920s Spanish Colonial bungalows and Craftsman cottages south of Franklin Avenue, the dingbat apartment blocks along Fountain and Lexington, and the postwar courtyard fourplexes east of Fairfax all share the same thermal problem: uninsulated 2×4 wall cavities, original wood lath and plaster, and attics that were never meant to be sealed. Many of these homes still have knob-and-tube wiring running through the attic, which means blown-in work has to be planned around it rather than over it. Balloon framing is common too, creating open chases from crawlspace to attic that move air like a chimney.
Hollywood’s climate shapes the job differently than a cold-weather market. Hot, dry summers with Santa Ana wind events push attic temperatures past 140 degrees, and that heat radiates down through the ceiling into living spaces. Winter nights hover in the 40s, and the draft through a 1920s attic hatch or an unsealed wall plate is real, even if we’re not fighting snow. The priority in Hollywood is radiant-heat control and air sealing rather than deep R-value stacking. That changes the right material choice, and it’s why we recommend blown-in cellulose or fiberglass in most wall cavities here rather than batts that can’t fill the irregular old framing. In the Hollywood Hills, crews also contend with sloped roofs and shallow attic spaces where access is tight and dense-pack techniques are the only way to reach the full cavity.
One more Hollywood reality: tenant occupancy. A large share of the city’s housing is rent-controlled and tenant-occupied, which means insulation upgrades usually happen during a unit turnover or alongside a seismic retrofit, not as a planned improvement while the place sits empty. We’re used to working around that calendar.
Our Main Hollywood Services
The two services Hollywood homeowners and property managers call about most are attic insulation and spray foam. Blown in insulation, covered in depth below, is the third and most common retrofit option for this city’s older walls.
Attic Insulation in Hollywood
Attic insulation in Hollywood is usually about stopping summer heat gain. A 1920s bungalow with no attic floor insulation or a thin layer of disintegrated paper-faced fiberglass can run ceiling temperatures 20 degrees hotter than the living space below. The solution depends on the attic: batts work in open, flat attics, while loose fill blown to depth handles the shallow, irregular spaces common under Hollywood’s sloped roofs. See our full Attic Insulation in Hollywood page for costs and the specific approach for these old attics, including what happens when crews find vermiculite.
Spray Foam Insulation in Hollywood
Spray foam insulation in Hollywood earns its keep on the hillside homes and the attic rooflines where air leaks through gaps that batts and loose fill can’t close. Open-cell Icynene works well for interior sound and air sealing in cramped attic conversions, while closed-cell Demilec handles moisture control in the crawlspace-adjacent areas that stay damp through Hollywood’s winter fog season. Details on pricing and where each foam makes sense are on our Spray Foam Insulation in Hollywood 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 Hollywood
Blown in insulation is the best fit for most Hollywood homes because it fills the irregular cavities that batts can’t. In a 1930s courtyard fourplex with lath and plaster, 2×4 walls, and knob-and-tube still in place, dense-packed cellulose or blown fiberglass reaches the entire wall without disturbing the wiring the way spray foam would. It’s also the standard for attics with shallow clearance and obstructed access, which describes a lot of the flats below the Hills. We install Blown In Insulation from brands like GreenFiber, and choose between cellulose and fiberglass based on the cavity, not on what’s left in the truck.
Cellulose Insulation
Signs you need it
You feel a temperature difference between rooms on the same floor, or the walls themselves radiate heat on summer afternoons and cold on winter mornings.
What it costs in Hollywood
Cellulose wall cavity dense-packing in Hollywood typically runs $1.50 to $3.00 per square foot, and an attic blow typically runs $1.25 to $2.25 per square foot.
How we do it
We cut access points through plaster or exterior siding, dense-pack the cavities with GreenFiber cellulose from the bottom plate up, and patch every hole so the wall looks untouched.
Blown In Attic Insulation
Signs you need it
Your top floor gets noticeably hotter than the rest of the house by late afternoon, or you can see the bare ceiling joists when you peek through the attic access panel.
What it costs in Hollywood
Blown-in attic insulation in Hollywood generally falls between $1.00 and $2.50 per square foot of attic floor, depending on depth and access.
How we do it
We clear the existing material after checking for vermiculite, air-seal the ceiling penetrations around old light boxes and wiring, then blow loose fill to the depth the attic framing allows.
What Blown In Insulation Costs in Hollywood
| Item | Typical range in Hollywood |
|---|---|
| Cellulose wall cavity dense-packing | $1.50 – $3.00 per sq ft |
| Blown-in attic insulation | $1.00 – $2.50 per sq ft |
| Blown fiberglass or loose fill (attic) | $0.75 – $2.00 per sq ft |
Will blown in insulation work in my 1920s Hollywood walls?
Yes. Dense-packed cellulose settles into lath-and-plaster cavities without opening the walls. The key is keeping the material away from knob-and-tube wiring, which we map and work around. Call (866) 605-6949 for a wall-by-wall assessment.
Can you blow insulation into a shallow Hollywood attic?
Yes, if there’s enough clearance for a 3-4 inch hose. We use loose fill and reach under sloped sections other crews skip. Call (866) 605-6949 and we’ll assess your access and clearances before quoting.
Brands We Service in Hollywood
We carry fiberglass from CertainTeed and mineral wool from Rockwool, plus Icynene and Demilec spray foam and GreenFiber recycled cellulose. The selection means we recommend by application, not by inventory. See our brands for the full lineup.
Pricing for Insulation Company in Hollywood, CA
| Service | Typical range in Hollywood |
|---|---|
| Cellulose wall cavity dense-packing | $1.50 – $3.00 per sq ft |
| Blown-in attic insulation | $1.00 – $2.50 per sq ft |
| Blown fiberglass or loose fill (attic) | $0.75 – $2.00 per sq ft |
| Fiberglass batt insulation (new install) | $0.80 – $1.50 per sq ft |
| Fiberglass batt replacement (remove and replace) | $1.20 – $2.50 per sq ft |
| Mineral wool batt insulation | $1.60 – $3.50 per sq ft |
| Open-cell spray foam | $0.75 – $1.50 per board foot |
| Closed-cell spray foam | $1.50 – $3.00 per board foot |
| Wall cavity injection (foam or dense-pack) | $1.75 – $3.50 per sq ft |
| Blown-in with vermiculite testing | $1.50 – $3.50 per sq ft |
Prices in Hollywood climb when attics hold old knob-and-tube wiring that slows down the work, when access hatches are too small and require cutting a larger opening, or when vermiculite has to be tested and removed before new insulation goes in. The quote we give is the price you pay: fixed, upfront, and free of surprise add-ons.
Neighborhoods We Serve in Hollywood
We cover the full Hollywood area, from the flats to the base of the Hills. Our crews are usually on site within one business day for an estimate, and same-week installation is common when material is available.
- Hollywood Dell
- Beachwood Canyon
- Franklin Village
- Thai Town
- Little Armenia
Service Area – Cities Near Hollywood
We work across the broader mid-LA area and regularly run jobs in Universal City, CA for hillside condos and in West Hollywood, CA for older apartment buildings. Koreatown, CA retrofits are common for us too, and Echo Park, CA bungalows present the same 1920s framing conditions we see every day in Hollywood. If your property is anywhere within 15 minutes of the 101, reach out.
Serving Hollywood, CA — Our Local Coverage Area
We’re based in the Hollywood 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 Hollywood
No, insulation is typically exempt from building permits in Hollywood. The exception is when the scope includes structural work like a seismic retrofit or full wall opening. We’ll flag any permit issue before you sign anything.
We can usually schedule a free estimate within one business day in most Hollywood neighborhoods. Installation follows as soon as you approve the quote and material is on hand, often the same week. Call (866) 605-6949 to check our current schedule.
Yes, we work around tenant schedules, and we’re used to finishing individual units during turnover windows. Coordinating with a property manager is routine for us. Call (866) 605-6949 and we’ll walk through the sequence that fits your building.
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 Hollywood Customers Say
"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"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."
— Miguel Garcia