Fast, Reliable Spray Foam Insulation Across North Hollywood
Spray foam insulation in North Hollywood typically runs $2.50 to $6.50 per board foot installed, with most attic and garage projects landing between $2,800 and $7,500 depending on square footage and foam type. We serve the 91601, 91615, 91616, and 91618 ZIP codes with same-week scheduling in most cases. If you’re tired of rooms that won’t hold temperature or smoke that finds its way inside during fire season, call (855) 341-7856 for a free estimate. Noel Carrasco and our crew know these Valley bungalows because we work on them every week.
North Hollywood’s housing stock is almost entirely 1920s through 1950s stucco bungalows and 1960s low-rise apartments. These homes were built when insulation was an afterthought. The attics are shallow, the wall cavities are often empty, and the summer sun turns the whole structure into a heat sink. We’ve crawled through enough NoHo attics to know exactly what we’re going to find before we open the hatch.
Why Comfort Zone Insulation Co Is North Hollywood’s Preferred Spray Foam Insulation Company
We install insulation and nothing else. That’s the whole business. When a North Hollywood homeowner calls us about a hot second floor or a garage that feels like an oven, we’re not a general contractor squeezing insulation between bathroom remodels. We diagnose, we air-seal, we spray, and we leave. The result is a home that holds the temperature you set.
Our North Hollywood customers come to us through word of mouth from neighbors in Valley Glen, Studio City, and the NoHo Arts District. That reputation took years to build. We carry eight leading brands including Johns Manville and Rockwool, so we’re never limited to whatever happened to be on the truck. For a 1948 bungalow off Magnolia Blvd, that might mean one product. For a 1970s apartment building near Burbank Blvd, it might mean another. The right material for your specific situation, not whatever we ordered this week.
Noel Carrasco built this company around a simple idea: most comfort problems start at the top. The attic is the single highest-impact insulation zone in almost every North Hollywood home, and we treat it that way.
Garage Spray Foam Insulation in North Hollywood
Garage Spray Foam Insulation in North Hollywood solves a problem almost every homeowner in the 91601 and 91602 area knows too well: the attached garage that turns into a furnace by 2 p.m. and radiates heat into adjacent rooms all evening. We spray closed-cell or open-cell foam directly onto the garage ceiling and shared wall to stop that heat transfer at the source. A typical detached or attached garage in North Hollywood runs $900 to $2,400, depending on whether we’re doing just the ceiling or the ceiling plus the shared house wall.
Ceiling Cavities and Shared Walls
Most NoHo garages have an unfinished ceiling with exposed joists. Spray foam fills those cavities completely, sealing the gap between the garage and whatever sits above it. The shared wall between garage and living space matters just as much, especially on bungalows where the garage sits under the same low-pitch roof as the bedrooms.
When the Garage Becomes a Workshop or Gym
If you’ve converted your garage into a workspace, band room, or home gym, open-cell foam on the walls and ceiling cuts both heat and sound transfer. We see this constantly in North Hollywood, where square footage is tight and the garage is the easiest bonus room.
Closed Cell Spray Foam Insulation in North Hollywood
Closed Cell Spray Foam Insulation in North Hollywood is our most requested product for two reasons: it adds structural rigidity to older framing and it acts as a full vapor and air barrier, which matters when wildfire smoke settles over the east Valley. Closed-cell foam runs $3.50 to $6.50 per board foot installed, so a typical attic roof deck in a 1,200-square-foot bungalow lands between $4,500 and $7,500. It’s the higher-cost option, but for specific problems it’s the only option that works.
Roof Deck Applications for Smoke and Heat
On low-pitch roofs like those on NoHo’s pre-war bungalows, spraying closed-cell foam directly to the underside of the roof deck creates an unvented attic that stays within a few degrees of the living space. We sprayed a 1948 bungalow near Magnolia Blvd and Lankershim Blvd in the 91601 ZIP where the original attic had only a thin layer of degraded rock wool. The homeowner complained of scorching second-floor rooms and smoke smell during the 2023 fire season. Our crew air-sealed the attic floor and sprayed Icynene closed-cell foam on the roof deck, cutting attic temps by roughly 30°F and eliminating the smoke infiltration entirely.
Wall Cavities in Older Homes
Closed-cell foam can be injected into existing wall cavities on stucco bungalows where the walls are open during remodel work. It’s dense enough to hold up structurally and creates an air seal that fiberglass batts simply can’t match in a 90-year-old wall.
Trusted Brands We Service in North Hollywood
We’re authorized installers for Johns Manville, Knauf, Rockwool, and CertainTeed products, among others. For North Hollywood customers that means access to the right foam chemistry for the job: open-cell for interior sound and thermal control, closed-cell for roof decks and moisture resistance, and mineral wool via Rockwool for anyone prioritizing fire resistance. We keep material lead times short because we work directly with manufacturer distribution centers in the Valley, not through third-party suppliers. When we quote a North Hollywood job, the product arrives when we say it will.
Common Spray Foam Insulation Problems We See in North Hollywood Homes
- Foam over knob-and-tube wiring. Many 1920s and 1930s NoHo bungalows still have active knob-and-tube circuits in the wall cavities. Spray foam applied directly over live knob-and-tube is a fire hazard because the foam traps heat from the conductors. We isolate and evaluate wiring before touching those cavities.
- Oversprayed closed-cell on low-pitch roof decks. North Hollywood’s bungalow roofs pitch at 2:12 or 3:12, which drains poorly. Thick closed-cell foam sprayed without proper moisture planning can trap condensation against the sheathing after winter rain, and we regularly repair delamination and rot from other contractors’ mistakes.
- Poor adhesion on dusty attic wood. Attics in NoHo’s old housing stock collect decades of fine dust and degraded insulation particulate. Spray foam needs clean, dry substrate to bond. Skipping surface prep leads to foam pulling away from the sheathing during extreme Valley heat cycles, which we fix with proper prep work before spraying.
- Smoke and ash infiltration through unsealed attics. During east Valley smoke events, fine ash and wildfire particulate enter living spaces through attic bypasses: light fixtures, plumbing chases, and the gap where the ceiling meets the wall. Air sealing and insulation have to go in together, or the smoke keeps coming through regardless of R-value.
Pricing for Spray Foam Insulation in North Hollywood, CA
Here are realistic numbers for the North Hollywood market. Open-cell spray foam runs $2.50 to $4.50 per board foot installed. Closed-cell runs $3.50 to $6.50 per board foot. A garage ceiling in a typical NoHo bungalow: $900 to $2,400. An attic roof deck on a 1,200-square-foot home: $4,500 to $7,500. Rim joist work in a crawlspace: $400 to $1,200. What moves the final number is access difficulty, the amount of prep work, and whether we’re removing old insulation first. Estimates are free, and the price we quote is the price you pay. Call (855) 341-7856 to schedule a walkthrough.
We Also Serve Cities Near North Hollywood
Our Spray Foam Insulation crew works across the eastern San Fernando Valley, including Studio City, Universal City, Burbank, and Valley Glen. If you’re just outside North Hollywood, we can usually reach you within the same service window. Call us and we’ll confirm your street before you commit to anything.
Serving North Hollywood, CA — Our Local Coverage Area
We’re based in the North 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 North Hollywood
Yes. Spray foam’s main advantage over fiberglass or rock wool is that it air-seals, not just insulates. Smoke and fine ash enter your home through gaps: attic bypasses, light fixtures, wall plates, and plumbing chases. Closed-cell foam on a roof deck or open-cell in wall cavities blocks those pathways, which is why we sell it in North Hollywood on air-quality grounds even more than energy savings. Call (855) 341-7856 if smoke intrusion is your main problem, and we’ll focus the estimate on air sealing first.
No, not directly. Existing fiberglass or degraded rock wool must be removed before spray foam goes down. Old insulation in NoHo bungalows is often full of dust, rodent droppings, and settled particulates that prevent proper foam adhesion. We vacuum it out, inspect the wiring, then spray. Removal adds cost to the job, but skipping it means the foam peels away from the sheathing within a few years.
Extremely well. North Hollywood regularly hits 95°F-plus in July and August, and attic temperatures can exceed 140°F. Spray foam’s air-sealing effect stops that superheated air from migrating into the living space, which is why our customers see immediate differences in second-floor comfort. The foam itself is stable at Valley heat levels once properly cured.
Only with proper isolation. Knob-and-tube wiring carries heat along the conductors, and surrounding it with foam traps that heat against old insulation. In North Hollywood’s pre-war housing stock, we evaluate every wall cavity before spraying. If active knob-and-tube is present, we either isolate the circuits with non-conductive barriers or recommend rewiring before insulation goes in. It’s a safety issue we don’t compromise on.
Open-cell foam is softer, lighter, and costs less, typically $2.50 to $4.50 per board foot. It’s ideal for sound control and interior wall cavities. Closed-cell is denser, acts as a vapor barrier, and adds structural strength, running $3.50 to $6.50 per board foot. For a garage shared-wall against living space, either works. For a garage roof deck exposed to smoke and moisture, we recommend closed-cell. Call (855) 341-7856 and we’ll tell you which fits your specific garage.
Written by Noel Carrasco, Owner at Comfort Zone Insulation Co, serving North Hollywood and the eastern San Fernando Valley.