Crawl Space Spray Foam Insulation in North Hollywood
Crawl Space Spray Foam Insulation in North Hollywood typically runs $1.20 – $2.80 per board foot for open-cell and $2.50 – $4.50 per board foot for closed-cell, with most full crawl space jobs under 1,200 square feet landing between $1,500 and $4,200 total. We schedule crawl space work in the early morning before the San Fernando Valley floor heats up, because a 1940s bungalow crawl space in 91601 or 91615 can hit 110°F by noon even when the house above stays cool. The goal is one trip: measure, prep, spray, and cure before the afternoon heat settles in.
Most North Hollywood crawl spaces we see are under older wood-frame stucco homes with pier-and-beam foundations. Dirt floors, open vents, and zero vapor control. That’s the standard starting point, and it’s exactly where closed-cell foam earns its keep. It air-seals and forms its own vapor barrier in one pass, which matters when the subfloor sits two feet above bare earth.
Open-Cell vs. Closed-Cell Under the Floor
Open-cell foam is lighter and cheaper per board foot, but it absorbs moisture. In a dusty, open crawl space under a North Hollywood ranch, that’s the wrong tool for the job unless a vapor barrier goes in first. Closed-cell brings its own built-in moisture resistance, which is why we lean on Demilec closed-cell for the majority of crawl space work in the Valley.
Why Crawl Space Foam Beats Batt Insulation Here
Fiberglass batts stuffed between floor joists sag, hold dust, and become nesting material. Foam adheres to the joists and the underside of the subfloor. It seals the small gaps where hot air sneaks up from the ground every afternoon. Homeowners near Chandler Boulevard and the NoHo Arts District tell us the difference in floor temperature in the back bedroom is the first thing they notice.
Spray Foam Insulation is the method we recommend when an older North Hollywood crawl space has settled insulation or exposed joists that need both sealing and insulating in one application.
Garage Spray Foam Insulation in North Hollywood
Garage Spray Foam Insulation in North Hollywood costs between $900 and $3,800 depending on whether we’re doing just the shared wall, the full ceiling, or an entire detached garage shell. Most attached garages on 1940s – 60s ranch lots need the garage ceiling and the wall shared with the house done in one morning. Detached garages, the ones converted into workshops, usually need the ceiling and at least two walls.
The detached garage is a North Hollywood staple. Lots in 91616 and 91618 are deep enough that the garage sits at the back of the property, separate from the house. That building is where we see table saws, classic car projects, music rooms, and home gyms. It’s also where the afternoon sun beats through an uninsulated roof deck until the interior climbs past 110°F. Foaming the roofline changes how that space behaves entirely.
Sealing the Oversized Door and Jamb Perimeter
Foam on the ceiling does half the job if the roll-up door and its perimeter gap are left open. When Santa Ana winds push dry, dusty air through North Hollywood in the fall, that gap becomes a funnel. We seal the door jamb perimeter and specify weatherstripping as part of the job, because a garage foamed without sealing the door opening is just a hot box with a draft.
Workshop and Hobby Garages
On a ranch tract near the NoHo Arts District, we foamed the vaulted ceiling of a detached workshop behind the house, a homeowner’s woodshop with an oversized roll-up door that had been baking all afternoon. Our crew staged at first light, sprayed Icynene on the underside of the roof deck and sealed the garage-side wall, then handed the shop back the same trip with the door cycling smoothly and interior temps down noticeably by mid-afternoon. That kind of single-visit finish is what we plan for on every North Hollywood garage job.
Common Spray Foam Insulation Problems We See in North Hollywood Homes
- Foam applied over settled or missing fiberglass in shallow 2×4 rafter bays. We open attics all over 91601 and 91615 where the original fiberglass has compressed to half an inch. Foaming over it without removing or correcting the old material leaves roof-deck hot spots that still drive AC overload in upper-90s Valley heat.
- Detached garages and workshops foamed without sealing the oversized door. The foam goes in, the door weatherstripping gets skipped, and radiant heat plus Santa Ana dust walks right past the new insulation. We see this on back-lot garages throughout the Valley Glen border areas.
- Crews spraying after mid-morning in unvented attics. When roof deck temps pass 140°F by midday in North Hollywood, foam adhesion suffers and off-gassing becomes a problem. A poor bond means a full redo, and the homeowner loses a second day. We schedule foam work at dawn for exactly this reason.
- Foam specified for wall cavities when the real heat gain is the roofline. North Hollywood’s problem is irradiant heat from above, not lateral heat transfer through walls. Foaming walls while ignoring the attic or roofline doesn’t fix what’s actually cooking the house. Our recommendations start with where the sun actually hits.
Pricing for Spray Foam Insulation in North Hollywood, CA
The factors that move the number are roof pitch, access clearance, how much old insulation has to come out first, and whether we’re sealing the door perimeter as part of the job. We give written, itemized numbers at the free estimate, not over the phone. Call (855) 382-3451 and we’ll come measure in person.
Trusted Brands We Service in North Hollywood
We carry Spray Foam Insulation in North Hollywood products from Icynene and Demilec, the two foam lines we install most often here. That covers both open-cell for air-sealing and sound control, and closed-cell for moisture resistance and structural rigidity. Because we also stock fiberglass from Owens Corning, Johns Manville, Knauf, and CertainTeed, plus Rockwool mineral wool and GreenFiber recycled cellulose, the recommendation you get is based on what your North Hollywood home actually needs. Not what we happen to have left on the truck. If the right answer to your attic problem is blown-in GreenFiber rather than foam, we’ll tell you that. The roofline and garage shell work is where foam justifies its cost, and we carry both leading foam lines so we can match the spec to the job rather than the other way around.
Fast, Reliable Spray Foam Insulation Across North Hollywood
Spray foam insulation in North Hollywood usually runs $900 – $6,000 depending on the area being foamed, and we complete most single-area jobs in one trip. We cover every ZIP code in North Hollywood, 91615, 91616, 91618, and 91601, with crews that know the block-by-block difference between a 1940s ranch off Magnolia and a newer mid-rise near the NoHo Arts District. Led by Ruben Castellano, our team has spent years foaming rooflines, crawl spaces, and detached garages across the San Fernando Valley. We know that North Hollywood attics get dangerously hot by midday and that the right insulation here stops heat from getting in the first place. Call us at (855) 382-3451 for a free, on-site estimate and we’ll tell you what your home actually needs, whether that’s spray foam, blown-in, or batt.
Why Thermal Insulation Co Is North Hollywood’s Preferred Spray Foam Insulation Company
North Hollywood homeowners call us because we schedule around the Valley heat, not through it. A spray foam job in a 140°F attic is a bad foam job. So our crews stage at first light and get adhesion-sensitive work done before the roof deck turns into a griddle. That’s not a preference, it’s building science, and it’s one of the reasons homeowners around the NoHo Arts District and Chandler Boulevard keep recommending us to their neighbors. We stock Icynene and Demilec foam, plus five other insulation material lines, which means the product recommendation comes from your home’s actual heat profile rather than whatever single brand a competitor happens to carry. Ruben Castellano runs an insulation-only shop. Insulation isn’t a sideline for us, it’s the entire trade. When we pull up to a 1950s ranch in 91616 or a new townhome near the Red Line, we know exactly what we’re looking for and how to fix it in one trip.
We Also Serve Cities Near North Hollywood
Our crews cover the surrounding Valley and hillside areas, including Studio City, Universal City, Burbank, and Valley Glen. If you live just outside North Hollywood and want the same dawn-scheduled, one-trip approach to foam insulation, the same team that handles North Hollywood jobs handles yours too.
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
Why do you schedule North Hollywood spray foam jobs at dawn?
Because unvented attics and garage rooflines in North Hollywood routinely exceed 140°F by midday in summer, and spraying foam onto a deck that hot causes poor adhesion and off-gassing. We start at first light so the surface temperature is still workable, the foam bonds correctly, and the job finishes in one trip. Call (855) 382-3451 and we’ll put you on the early schedule, free estimate included.
Can you foam a detached workshop or oversized garage door opening in North Hollywood?
Yes. We foam detached workshops and garages all over 91616 and 91618, and we always seal the oversized door jamb perimeter as part of the job. Foaming the roofline of a back-lot workshop without sealing that door gap leaves a dust and heat leak that defeats the work. We handle both in the same visit.
My 1950s North Hollywood ranch has settled or missing fiberglass in a shallow attic, can spray foam go over it?
No, not directly. Foam needs a clean, solid substrate to adhere properly. Over settled fiberglass, it will delaminate and leave hot spots. We remove the old material first, then either foam the roof deck or blow in fresh insulation depending on what the attic structure calls for. We’ll show you what’s up there before we quote anything.
Does spray foam make sense for crawl spaces under North Hollywood bungalows?
It does, and closed-cell foam is the version we recommend under most pier-and-beam homes here. It air-seals and acts as its own vapor barrier, which matters when the crawl space is open to Valley dust and dry ground heat. Plan on $1,800 – $3,600 for a typical bungalow crawl space.
Will spray foam let me downsize my AC in a North Hollywood home?
On a 1940s – 60s ranch with a hot attic and leaky roofline, sealing and foaming the roof deck or attic floor can reduce the cooling load enough that a smaller AC becomes a real option at replacement time. We don’t promise specific percentage savings, but we’ve seen foam-sealed attics change how late in the day a house finally cools down. Call (855) 382-3451 and we’ll assess what your roof deck actually needs.
Written by Ruben Castellano, Owner at Thermal Insulation Co, serving North Hollywood and the San Fernando Valley.