Insulation Company in Hollywood, CA
Blown in insulation solves the most common problem we see in Hollywood homes: walls and attic cavities that were never insulated when the building went up. Most of the 1920s and 1930s courtyard apartments and Spanish Revival fourplexes around 90028 have empty stud bays and open attic floors, so heat pours in through the roof during summer and sound travels between units year-round. We work with blown in cellulose and fiberglass to fill those cavities without tearing out plaster and lath. If your Hollywood apartment or house runs hot upstairs, has thin walls, or costs too much to cool, call Heartland Insulation Co at (855) 382-3938 for a free assessment.
Why Hollywood Homes Are Different
Hollywood’s housing stock is dense older rental property, not sprawling single-family suburbia. The core of 90028 is packed with 1920s-30s Spanish Revival and courtyard apartment buildings framed with knob-and-tube-era lumber, finished in plaster and lath, and built with no insulation in exterior walls or party walls. Midcentury low-rise buildings and newer mixed-use infill sit alongside them, but the uninsulated vintage stock dominates the work we do. The climate here is Mediterranean: winters rarely freeze, but summers bring dry heat and intense sun that turns uninsulated attics into heat radiators. Cooling load and radiant-heat control matter more than heating, and the region’s wildfire-driven attention to ember-resistant attic assemblies increasingly shapes what code officials and HOA boards ask for. In dense Hollywood courtyard apartments, we routinely find open balloon-frame party walls between units with no fire-blocking and no insulation at all. That is why sound transfer between apartments is a chronic complaint and why acoustic batts plus fire-blocking at the party wall is a signature Hollywood job.
Our Main Hollywood Services
Most Hollywood property owners call us about two things: attics that are bleeding conditioned air and walls or rooflines that need air-sealing and full-cavity coverage. These are the two services that keep our crews busy across 90028.
Attic Insulation in Hollywood
Attic work in Hollywood means going into tight, low-slope spaces above 1920s plaster ceilings and working around old knob-and-tube wiring that often needs to be cleared before insulation goes in. Most of these attics have never been touched since construction. We remove or work around the old material, air-seal the top plates and penetrations, and install batts or blown material matched to the roof assembly. In courtyard buildings, we also check the attic side of party walls. Attic Insulation in Hollywood covers the full scope, including how we handle ember-resistant detailing on vents and eaves.
Spray Foam Insulation in Hollywood
Spray foam earns its keep in Hollywood’s mixed-use buildings, where commercial kitchens, nightlife-adjacent retail, and residential units share walls and rooflines. Closed-cell foam air-seals and adds racking strength to old framing, while open-cell foam handles sound in interior partition walls and floor-ceiling assemblies between stacked units. For a landlord dealing with noise complaints from a bar below an apartment, foam is often the only material that actually stops the transfer. Spray Foam Insulation in Hollywood explains the difference between open and closed cell and where each fits in 90028’s building types.
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 workhorse retrofit for Hollywood’s older apartment stock because it is the only practical way to fill existing wall and ceiling cavities without gutting the plaster. A 1930s courtyard apartment with lath-and-plaster walls and no sheathing leaves us with empty stud bays that run between the exterior and the heated space. Blown in cellulose or fiberglass fills those bays through small access holes, bringing the wall from roughly R-0 to R-13 or better while cutting both heat gain and sound transfer. In Hollywood’s dry, sunny climate, cooling is the real battle, and adding cavity insulation drops attic and wall surface temperatures fast. We do this work at the party wall too, where adding dense-pack cellulose reduces the drum effect that turns a neighbor’s TV into your living room soundtrack. As a blown-in specialist running three installation methods in-house, we spec the cavity based on the framing, the existing wiring, and the humidity profile of the building, not on whichever material we happen to stock. Learn more about our process on the Blown In Insulation page.
Cellulose Insulation
Signs you need it
Rooms that heat up by mid-morning, cold walls in winter, and voices or music bleeding through party walls all point to empty stud bays that dense-pack cellulose can fill.
What it costs in Hollywood
Dense-pack cellulose wall retrofits in Hollywood typically run $1.50 to $3.50 per square foot of wall area, with attics landing around $1.00 to $2.25 per square foot.
How we do it
We drill small access holes through plaster or sheathing, snake a fill tube into each stud bay, and dense-pack the cavity from bottom to top, then patch the holes clean.
Blown In Attic Insulation
Signs you need it
Bedrooms directly under the roof that run 10 degrees hotter than the rest of the unit and cooling bills that spike every summer mean the attic floor has little or no insulation over the ceiling.
What it costs in Hollywood
Blown in attic insulation in Hollywood runs $1.50 to $4.00 per square foot, depending on the target R-value and how much prep the attic needs.
How we do it
We air-seal the top plates, can lights, and any chases first, then blow loose-fill fiberglass or cellulose to the depth the ceiling needs for the roof assembly.
Blown In Cellulose Insulation
Signs you need it
Older Hollywood homes and apartments with uninsulated balloon-framed walls and drafty interiors are prime candidates for dense-pack blown in cellulose.
What it costs in Hollywood
Blown in cellulose work in Hollywood typically falls between $1.50 and $3.50 per square foot for walls and $1.00 to $2.25 per square foot for attics.
How we do it
We dense-pack the cavities through drilled access holes, using a fill tube and pressure gauge so every bay gets full, consistent coverage without voids.
What Blown In Insulation Costs in Hollywood
| Item | Typical range in Hollywood |
|---|---|
| Blown in attic insulation | $1.50 – $4.00 per sq ft |
| Dense-pack wall retrofit (cellulose or fiberglass) | $1.50 – $3.50 per sq ft |
| Whole-wall or whole-attic prep and air-sealing | Adds $0.50 – $1.00 per sq ft |
Can you blow insulation into existing walls without opening them up?
Yes. We drill small access holes through plaster or stucco, dense-pack the cavity, and patch the holes. The walls stay intact; only small, easily repaired plugs remain.
How long does a blown in insulation job take in Hollywood?
Most wall retrofits in Hollywood finish in one day per unit. Attics take half a day to a day. Call (855) 382-3938 for a timeline on your building.
Brands We Service in Hollywood
We install and service blown in and batt insulation from Johns Manville, Knauf, Rockwool, and CertainTeed across Hollywood. Stocking multiple lines means the material follows the job spec, not the other way around. Common cellulose and fiberglass products are ready at our Boyle Heights yard for same-week starts in 90028. See our brands for the full roster.
Pricing for Insulation Company in Hollywood, CA
| Service | Typical range in Hollywood |
|---|---|
| Blown in attic insulation | $1.50 – $4.00 per sq ft |
| Dense-pack wall retrofit (cellulose or fiberglass) | $1.50 – $3.50 per sq ft |
| Cellulose insulation | $1.50 – $3.50 per sq ft |
| Blown in cellulose insulation | $1.50 – $3.50 per sq ft |
| Blown in fiberglass insulation | $1.00 – $2.25 per sq ft |
| Loose fill insulation | $1.50 – $4.00 per sq ft |
| Blown in attic insulation | $1.50 – $4.00 per sq ft |
| Air-sealing and prep add-on | Adds $0.50 – $1.00 per sq ft |
Pricing in Hollywood pushes upward when we are working in occupied apartments, when knob-and-tube wiring must be cleared first, or when party-wall fire-blocking needs to be installed alongside the insulation work. Every job is quoted upfront at a fixed price, so you will never see a change order after we start.
Neighborhoods We Serve in Hollywood
We work throughout 90028 and the surrounding Hollywood flats and hillside streets, including:
- Hollywood Boulevard corridor
- Whitley Heights
- Hollywood Dell
- Thai Town
- Little Armenia
Most Hollywood jobs get a crew on site within 3 to 5 business days of the accepted quote, and we schedule around tenant access in occupied apartment buildings.
Service Area – Cities Near Hollywood
Heartland Insulation Co serves Hollywood and the surrounding Los Angeles neighborhoods. We regularly run crews into Koreatown, CA, Echo Park, CA, Silver Lake, CA, and the broader Los Angeles, CA area. If your building sits just outside 90028, call us and we will confirm coverage on the spot.
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
Most Hollywood projects get a site visit within 2 to 3 business days and a crew scheduled within the week. For urgent issues like a failed party-wall fire-block, we can sometimes move faster. Call (855) 382-3938 and we will give you a real date.
In most Hollywood condo and apartment buildings, yes. Work in shared walls, attics, or crawl spaces usually requires board or owner approval, especially when it touches fire-rated assemblies. We can provide specs and scope documents for your HOA package.
Most insulation retrofits do not require a permit, but fire-blocking corrections and work in mixed-use buildings sometimes do. We will tell you if your job needs one and handle the submittal as part of the scope.
If your Hollywood building is running hot, leaking sound between units, or costing too much to cool, call Heartland Insulation Co at (855) 382-3938. We will assess the cavities, tell you what material actually fits your walls and attics, and give you a fixed price before any work starts.
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 Hollywood Customers Say
"Handled the utility rebate paperwork, which knocked a real amount off the final cost."
— Amanda Delaney"Plastic laid from the front door to the attic hatch and they vacuumed the hallway afterward."
— Anika Gupta"Found and sealed a gap around the chimney chase that was basically an open chimney to the attic."
— Matt Gallagher