Fast, Reliable Spray Foam Insulation Across Hollywood
Spray foam insulation in Hollywood typically costs $2.50 to $6.50 per board foot installed, with most whole-attic projects in the 90028 zip code landing between $3,800 and $9,200 depending on square footage and whether you choose open-cell or closed-cell. We know Hollywood’s buildings: the 1920s courtyard apartments off Cahuenga, the postwar stucco low-rises near Sunset and Western, the bungalow courts tucked behind Highland. Our crews are in Hollywood weekly, and we can usually be on site within 48 hours for a free estimate. Call (855) 362-0195 and we’ll send someone who actually understands the age and quirks of your building.
Why Even Air Insulation Is Hollywood’s Preferred Spray Foam Insulation Company
Hollywood’s housing stock is not like the rest of Los Angeles. Most homes and rentals in 90028 were built before 1960, which means plaster walls, wood-frame construction, and in a lot of cases, zero cavity insulation. That is not a guess – we see it on nearly every retrofit we do between Sunset and Hollywood Blvd. Our crews have worked in enough Spanish courtyard buildings and mid-century stucco boxes here to know exactly where air leaks hide and how foam behaves against old plaster, knob-and-tube wiring, and low-clearance attic spaces.
Led by Nelson Quirarte, our approach is method-driven, not product-driven. We carry both Icynene and Demilec spray foam lines, so we can match open-cell or closed-cell to what the building actually needs. Closed-cell adds structural rigidity and moisture resistance. Open-cell costs less and makes sense in vented attics where you want air-sealing without the full vapor barrier. The point is, we are not showing up with one product and hoping it fits every space. That matters in Hollywood, where the buildings predate modern insulation standards entirely.
Homeowners here tell us the same things: top-floor units bake in summer, AC runs nonstop, and bedrooms over the garage stay uncomfortable. We have addressed those exact issues from the Hollywood Dell to the blocks around Los Angeles City College to the apartment courts east of Vine. Our Spray Foam Insulation team handles everything from small rim joist sealing jobs to full roof deck applications on flat-roof buildings. When you call, you get a straight answer about which method fits your structure and why.
Crawl Space Spray Foam Insulation in Hollywood
Crawl Space Spray Foam Insulation in Hollywood is a job we tackle most often in the older bungalow courts and single-family homes scattered through 90028, where ventilated crawl spaces under wood floors let damp air and musty smells drift up into living areas. The fix here is not just thermal – it is moisture control. We apply closed-cell foam to the crawl space walls or floor joists, sealing the ground-side moisture source and stabilizing indoor humidity. Most crawl space jobs in Hollywood run $2,400 to $5,800 depending on access depth, square footage, and whether we are insulating the foundation walls or the subfloor above.
When a Hollywood Home Needs It
Homes built in the 1920s and 30s in Hollywood were almost never given a sealed crawl space. You might notice floors that feel cold in winter, a persistent earthy smell in the first-floor unit, or higher-than-expected AC costs because cooled air is escaping through gaps in the subfloor. In a duplex or courtyard building, the ground-floor unit right above the crawl space usually suffers most. Nelson Quirarte and our crews look for signs like darkened floor joists, peeling paint at the baseboards, or condensation on HVAC ductwork running through the crawl.
Closed-Cell in Damp Hollywood Crawls
We typically recommend closed-cell foam for Hollywood crawl spaces because the soil here holds moisture through summer irrigation and winter rains. Closed-cell acts as its own vapor retarder. It does not absorb water the way fiberglass batts would, and it won’t become a nesting material for rodents, a real concern in older wood-frame buildings around Hollywood. The result is a drier, cleaner crawl space that stops feeding humidity into the home above.
Garage Spray Foam Insulation in Hollywood
Garage Spray Foam Insulation in Hollywood is a high-demand service in the Hills-adjacent single-family homes and the townhome complexes off Franklin and Beachwood, where attached garages sit directly below living space or share a wall with bedrooms. The job involves applying spray foam to the garage ceiling, shared walls, and the rim joist band where the garage meets the house. Typical costs for garage insulation in Hollywood land between $1,800 and $4,200, depending on whether the garage is finished, the ceiling is open joist, and how much of the wall area is shared with conditioned space.
Why Hollywood Garages Run Hot
Hollywood’s long, hot summers turn uninsulated garages into ovens by mid-afternoon. If your garage is under a bedroom or off the kitchen, that heat transfers straight into your living space and forces the AC to work overtime. We apply foam to the garage ceiling and rim joist to break that heat bridge. In detached garages converted to studios or workspaces, we recommend open-cell foam on the full ceiling deck to keep the space usable through July and August.
Rim Joist Air Sealing vs. Full Garage
Sometimes the full garage does not need foam – just the rim joist band. In stick-framed homes on the flat blocks off Santa Monica Blvd, the rim joist is a continuous air leak that lets exterior air travel through every floor cavity above. Sealing the rim joist with spray foam in a typical Hollywood garage runs $900 to $1,600 and often makes a bigger difference per dollar than insulating the whole garage. We evaluate that first.
Trusted Brands We Service in Hollywood
We carry materials from manufacturers we actually stand behind: Icynene for open-cell applications where air-sealing and cost matter, Demilec for closed-cell where structural strength and moisture control are priorities, and CertainTeed where a hybrid batt-and-foam approach fits the project better. Having both foam brands available means Hollywood customers are not forced into one product because it is what the contractor happens to stock. If your building needs closed-cell against a roof deck but your neighbor’s place needs open-cell in a knee wall, we cover both without compromise. We also keep a supply of foam-compatible sealants and accessories on our trucks so Hollywood jobs are not delayed waiting on parts.
Common Spray Foam Insulation Problems We See in Hollywood Homes
- Foam applied directly over active knob-and-tube wiring. In 1920s courtyard buildings around Hollywood Blvd and Western, knob-and-tube is still live in many walls. Spray foam covering this wiring can trap heat and create a fire risk, and it will fail inspection. We identify and address any active wiring before foam goes in.
- Improper sealing of low-clearance attics causing trapped moisture. The flat-roof attics over plaster ceilings in older Hollywood apartments have almost no ventilation. If foam is applied without the right air-sealing strategy, moisture gets trapped and the plaster below cracks or stains. We map the assembly first.
- Closed-cell foam on historic stucco with no vapor management. Some Hollywood buildings have original stucco exteriors that need to breathe. Applying closed-cell foam directly against those walls without accounting for vapor movement causes paint blistering and slow decay behind the stucco. We check the wall assembly before recommending foam type.
- Overspray gaps at rim joists in hillside garages. Garage rim joists on sloping Hollywood Hills lots are often not square or continuous, and sloppy work leaves gaps where cold air still moves through. We inspect the entire rim joist band after spraying and fix what others leave open.
Pricing for Spray Foam Insulation in Hollywood, CA
Spray foam in Hollywood runs $2.50 to $4.00 per board foot for open-cell and $4.50 to $6.50 for closed-cell, installed. A 1,200 square foot attic with 2×6 roof joists and open-cell at 5.5 inches typically costs $4,500 to $6,800. A full garage ceiling with closed-cell is usually $2,200 to $3,600. Crawl space work lands between $2,400 and $5,800. What moves the number in Hollywood specifically is access: the low-clearance flat-roof attics over plaster ceilings take longer and cost more per square foot than open attics. The condition of any existing insulation also matters – removal of old, settled fiberglass adds $1 to $2 per square foot. We quote a fixed price after we inspect the space, not a vague range. Estimates are free, and there is no obligation. Call (855) 362-0195 to schedule yours.
We Also Serve Cities Near Hollywood
Our crews work throughout the Hollywood area and into surrounding neighborhoods. If you are in Hollywood proper or nearby in Universal City, West Hollywood, Koreatown, or Echo Park, we can service your building with the same fast response and material options. Flat-roof attics, older apartment stock, and hillside garages extend across these neighborhoods, and our experience carries directly over.
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 Spray Foam Insulation in Hollywood
Yes, spray foam can be applied in 1920s Hollywood courtyard apartments with plaster walls, but the building must be checked first for active knob-and-tube wiring and the wall assembly evaluated before any foam is sprayed. In these buildings, we typically recommend insulating the attic or roof deck rather than drilling into original plaster walls, because the wall cavities are often shallow, irregular, and full of obstructions. If wall insulation is the goal, a careful injection approach or closed-cell foam with proper vapor management may work. Call (855) 362-0195 and we will inspect your specific building before recommending anything.
The best approach for a flat-roof attic in Hollywood is to seal air leaks and apply spray foam to the underside of the roof deck, often with open-cell foam if the attic is vented or closed-cell if the space is enclosed. Hollywood’s flat-roof attics are usually low-clearance, cramped spaces over plaster ceilings that bake under direct sun from late June through September. Foaming the roof deck stops radiant heat from reaching your living space and seals gaps around old recessed fixtures and ductwork. This approach consistently cuts AC runtime in top-floor Hollywood units.
Spray foam reduces musty smells in older Hollywood apartments by sealing off the air pathways that carry damp, earthy air from crawl spaces, unsealed attics, and rim joists into your living space. The foam itself does not add fragrance or absorb existing odors; it blocks moisture migration at the source. In buildings with crawl spaces under wood floors or open soffit gaps at the roofline, sealing those areas with closed-cell foam stops humid air from circulating through the unit and condensing on cool plaster surfaces. Once the moisture path is closed, the smell typically fades within days.
Most spray foam insulation retrofits in Hollywood do not require a city permit, but any job involving knob-and-tube wiring, structural changes, or work in a historic-designated building may trigger inspection requirements. Code enforcement in Los Angeles takes knob-and-tube seriously, and if your 1920s courtyard building still has active wiring in the walls, that issue must be resolved before insulation goes in. We are familiar with Hollywood’s older building stock and can flag any permit or inspection concerns during the free estimate. Always ask your contractor about this before work begins.
Yes, spray foam insulation works well in garages below Hollywood Hills homes, especially where the garage ceiling forms the floor of a living space above. Closed-cell foam is typically the right choice for hillside garages because it resists moisture, adds rigidity to the assembly, and fully seals the uneven rim joist bands common on sloping lots. We regularly insulate tuck-under garages off streets like Beachwood and Cahuenga where heat soaks through the garage ceiling into bedrooms above. Typical costs run $1,800 to $4,200 depending on the space.
If your Hollywood building is hot, drafty, or musty, we can tell you exactly what is causing it and whether spray foam is actually the right fix. Call (855) 362-0195 for a free estimate. Even temperatures. Even energy bills. Even air.
Written by Nelson Quirarte, Owner at Even Air Insulation, serving Hollywood since we started this company.