Spray Foam Insulation in North Hollywood — Same-Day Service, Done Right the First Time

Fast, Reliable Spray Foam Insulation Across North Hollywood

Spray foam insulation in North Hollywood typically runs $2.50 to $7.00 per square foot installed, depending on whether you need open-cell or closed-cell chemistry and where we’re spraying. Most attic jobs in NoHo’s pre-war bungalows land between $4,800 and $9,500, while a full rim joist sealing project usually sits in the $1,800 to $3,400 range. If you’re fighting 140°F attic heat radiating down through your ceilings in July, call (855) 773-6429 and we’ll diagnose what’s actually happening up there before recommending anything.

Call (855) 773-6429

We’re Placentia Insulation, and we’ve spent years working through the specific problems North Hollywood homes throw at insulation crews. Not Van Nuys problems. Not Burbank problems. NoHo problems: unvented attics, 1920s framing, knob-and-tube wiring, and Valley heat that turns a poorly insulated attic into an oven. Our crews know the housing stock between Lankershim and the 170, and we know which spray foam chemistry makes sense for each structure. You don’t need another contractor who treats insulation as a checkbox. You need someone who understands why your living room hits 85°F by 3pm.

Why Placentia Insulation Is North Hollywood’s Preferred Spray Foam Insulation Company

We’re a pure-play insulation contractor. That’s all we do. When Alan Whitcomb built this company, the point was simple: insulation deserves a specialist, not a general contractor who sends whoever’s available. Every crew member who shows up at a North Hollywood home spends their entire week working on insulation, and every conversation we have is about thermal performance, air sealing, and moisture control. We don’t split our attention between plumbing and drywall.

North Hollywood homeowners call us because we carry eight insulation brands across four material types. Most insulation shops in the Valley stock one or two product lines and install whatever’s on the truck. We stock Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber. That means when we assess a 1928 bungalow off Lankershim, we’re choosing between open-cell Icynene for the roof deck and closed-cell Demilec for the rim joists based on what the structure actually needs, not what we happen to have in surplus. We match the material to the job, not the job to whatever’s in the warehouse.

Response time to North Hollywood is a standard part of how we operate. We schedule assessments across the east Valley daily, and our crews know the traffic patterns on Burbank Boulevard, Victory, and the 170 corridor well enough to give you a realistic arrival window. When you call (855) 773-6429, you’re talking to someone who knows what a 91601 attic looks like in August.

Closed Cell Spray Foam Insulation in North Hollywood

Closed cell spray foam insulation is the higher-density option most North Hollywood homeowners choose when they’re sealing rim joists, crawlspace walls, or any area that needs both air sealing and a vapor barrier. It cures rigid, adds structural strength to framing, and blocks moisture migration. In a city where winter nights dip into the 40s and summer days push 105°F, closed-cell foam creates a thermal break that fiberglass batts simply can’t match in older wood-frame construction.

Closed-cell typically runs $3.50 to $7.00 per square foot in North Hollywood. The higher cost compared to open-cell comes from the chemistry: closed-cell uses a blowing agent that yields an R-value around R-6.5 to R-7 per inch, meaning you hit code-required R-values in thinner profiles. For a typical NoHo rim joist sealing job, expect $1,800 to $3,400. We use Demilec closed-cell for most of this work because its adhesion holds up on the dusty, oily surfaces common to 1920s – 1950s wood framing.

Rim Joist Sealing for Valley Heat

The rim joist is where your floor framing meets the foundation, and in North Hollywood’s older homes it’s almost always uninsulated. Hot exterior air pours through that gap all summer, while winter nights let cold air infiltrate straight into your floors. Closed-cell foam seals it in one pass, cutting air movement and adding R-value in a space fiberglass never fits well.

Moisture Control for Crawlspaces

North Hollywood’s diurnal temperature swing creates condensation problems in vented crawlspaces. Closed-cell foam on crawlspace walls blocks that moisture cycle at the source. It’s also the right call when termites are a concern in the 91605 and 91606 ZIPs, since the rigid foam resists pest intrusion better than open-cell options.

Open Cell Spray Foam in North Hollywood

Open cell spray foam is what we typically recommend for attic roof decks in North Hollywood’s pre-war bungalows and tract homes. It expands to fill every irregular cavity in old framing, air-seals thoroughly, and stays vapor-permeable so your attic can still breathe. At R-3.5 to R-3.8 per inch, it’s not the highest R-value per inch, but in an attic roof deck application it doesn’t need to be. The air sealing is what changes the comfort equation.

Open-cell spray foam in North Hollywood runs $2.50 to $5.00 per square foot depending on depth. A standard attic roof deck application on a 1,200-square-foot NoHo bungalow typically falls between $3,800 and $6,800. We use Icynene open-cell for most attic roof deck work in the area because it performs consistently on the irregular rafter spacing we see in 1920s and 1930s framing.

Attic Roof Deck Insulation

Spraying the roof deck means your attic becomes part of the conditioned space instead of an oven that radiates heat into your ceiling all afternoon. In North Hollyood, where attic temperatures routinely exceed 140°F in July and August, this single change drops second-floor and ceiling surface temperatures dramatically. It also protects any ductwork running through the attic, since the ducts stop living in an environment hotter than your oven.

Sound Dampening for Multi-Unit Properties

North Hollywood’s newer apartment and mid-rise development along the arts district and transit corridors brings residents who need interior noise control. Open-cell foam’s air-sealing properties make it excellent for wall cavity applications in multi-family construction, cutting both sound transmission and stack effect air movement. For property owners in 91601 and 91615, this is one of the cheapest ways to improve unit comfort without touching HVAC.

Trusted Brands We Service in North Hollywood

We don’t push one manufacturer’s product on every job. North Hollywood homeowners get what the home actually needs, and that means we carry Icynene open-cell for attic roofs, Demilec closed-cell for rim joists and crawlspaces, and CertainTeed and GreenFiber options for hybrid projects that combine foam with blown-in or batt materials. When a 91606 bungalow needs ventilation work plus air sealing plus attic floor insulation, we’re pulling from multiple brands on the same project. That’s the advantage of an eight-brand material library. You’re not settling for whatever the installer’s preferred supplier stocks this month.

Because we carry these materials in active inventory, we’re not waiting on a distributor shipment before we can start work in North Hollywood. When your attic is hitting 140°F in the middle of a heat wave, that turnaround difference matters. Call (855) 773-6429 and we’ll tell you exactly what’s available for your specific project.

Common Spray Foam Insulation Problems We See in North Hollywood Homes

• Foam sprayed into unvented pre-war attics without adding ventilation first. Most 1920s – 1940s bungalows east of Lankershim have no soffit or ridge vents at all. If a crew sprays foam without adding ventilation, heat and moisture get trapped against the roof deck, blistering the foam and eventually rotting the sheathing. We install ridge and soffit vents before any foam touches the deck.
• Closed-cell foam applied over old knob-and-tube wiring. This is a fire hazard and an automatic inspection failure. In North Hollywood’s 91601 and 91605 ZIPs, knob-and-tube is still common in 1920s and 1930s homes. We inspect every attic before spraying and flag any wiring issues so you can have an electrician address them before we foam.
• Foam delamination from dusty or oily attic surfaces. Eighty years of accumulated dust, oily residue from old heating systems, and general grime prevent foam from bonding properly to wood framing. On 1920s – 1950s wood-frame homes, we prep surfaces before spraying rather than just shooting foam and hoping it sticks.
• Incomplete coverage around irregular framing. Pre-war NoHo attics were built with whatever lumber was available, meaning rafter spacing varies and odd angles are everywhere. A lazy spray job leaves gaps that create thermal bridging. Our crews spray to full depth on every surface, not just the easy ones.

Pricing for Spray Foam Insulation in North Hollywood, CA

We Also Serve Cities Near North Hollywood

We run crews across the east San Fernando Valley every week. Beyond Spray Foam Insulation in North Hollywood, we handle spray foam projects in Studio City, Universal City, Burbank, and Valley Glen. If you’re in one of those areas, reach out and we’ll schedule an assessment the same week. For a broader look at how our Spray Foam Insulation team approaches every job, you can see the full service breakdown on our hub page.

FAQs About Spray Foam Insulation in North Hollywood