Fast, Reliable Spray Foam Insulation Across North Hills
Spray foam insulation in North Hills typically costs $2.50 – $7.00 per board foot installed, with most full attic projects in the 91343 ZIP landing between $3,800 and $9,500. We’re in North Hills at least three days a week, and our crews know the 1950s ranches off Sepulveda, the stucco tracts near Rayen Street, and the converted garages throughout 91343 better than any company driving in from downtown. Call (866) 393-6041 for a straight answer on what your specific house needs.
Our Spray Foam Insulation team works the full San Fernando Valley, but North Hills is a different animal from Van Nuys or Northridge. The heat sits here longer, the houses were built in a narrow window, and the insulation decisions aren’t the same as they are five miles south.
Why Laguna Hills Insulation Is North Hills’s Preferred Spray Foam Insulation Company
North Hills homeowners call us for one reason more than any other: we tell them what their 1958 ranch actually needs, even when it means less foam and more air-sealing. Garrett Lund built this company on the idea that the material should fit the house, not the other way around. That matters in a place like North Hills, where the housing stock is unusually uniform and the problems are predictable if you’ve spent time in enough attics here.
We hold credentials with Icynene and Demilec, two of the most demanding spray foam product lines to get qualified on. That’s not marketing language. It means we’ve installed enough open-cell and closed-cell foam to know when each one makes sense in a 1950s Valley attic. We stock Owens Corning and Rockwool products in our local material pipeline, which means North Hills customers aren’t waiting on a supply run from Orange County when a job runs long.
Response time to North Hills is usually same-day for estimates and within 3 – 5 days for scheduled work, depending on scope. Summer attic work in North Hills starts at dawn because by 10 a.m. a 140°F attic is dangerous to work in and changes how the foam cures. We schedule around that, not through it.
Crawl Space Spray Foam Insulation in North Hills
Crawl Space Spray Foam Insulation in North Hills is a job we do on about a third of the houses we quote in 91343, and the reason is usually the same: a mid-century ranch with a vented crawl that’s been pulling in dry Valley air, dust, and whatever the Santa Anas blow through. The fix here isn’t just spraying foam. It’s sealing the rim joists, treating the crawl as a conditioned space or at least an air-sealed one, and stopping the stack effect that pulls 140°F attic heat down into the living space in summer and cold air up through the floorboards in January.
In North Hills, crawl spaces run hot and bone-dry most of the year. Closed-cell foam holds up better in that environment than fiberglass batts, which sag and collect dust. Most North Hills crawl space jobs land in the $1,800 – $4,200 range depending on square footage, access, and whether we’re sealing rim joists or doing the full crawl encapsulation.
Rim Joist Sealing for Valley Ranches
The rim joist is where the floor framing meets the foundation wall, and it’s the single biggest air leak in a North Hills crawl space. We spray closed-cell foam along the entire rim and around any plumbing or electrical penetrations. That one step stops the dust and the drafts, and it’s the difference between a crawl space job that works and one that just looks busy.
Full Crawl Encapsulation in 91343
On homes where the crawl is damp from irrigation runoff or a leaking grade, we’ll recommend full encapsulation: closed-cell foam on the walls, a vapor barrier on the floor, and a sealed access. It costs more, but in North Hills the dust load and the dry rot at the sill plates make it worth doing right the first time.
Garage Spray Foam Insulation in North Hills
Garage Spray Foam Insulation in North Hills is one of the highest-ROI upgrades for these houses, and it’s the job we think most 91343 homeowners should consider before replacing their HVAC. In a 1950s ranch, the garage is usually attached or converted into living space, and the ceiling above it is a thin layer of drywall under a sun-baked roof deck. By 3 p.m. in August, that ceiling is radiating 120°F into whatever room sits under it. Garage ceiling spray foam stops that load at the source.
For North Hills garages that stay as workspaces, we spray closed-cell on the ceiling and the wall shared with the house. For converted garages with living space, we spray open-cell on the ceiling for sound control and add a thermal barrier over the foam. Typical garage ceiling jobs in North Hills run $2,200 – $5,800 depending on size and whether we’re addressing the roof deck or just the ceiling plane.
Garage Ceiling Spray Foam
The ceiling is the real battleground in a North Hills garage. We spray closed-cell directly on the underside of the roof deck when there’s no attic above the garage, or on the ceiling drywall when there is. The point is to stop the radiant heat from the low-slope roof before it enters the space. That’s the difference between a garage that’s 95°F and one that’s 80°F on a 104°F Valley afternoon.
Firewall and Shared Wall Treatments
When a garage shares a wall with a bedroom or living area, the spray foam has to work as a fire-rated assembly, not just insulation. We use closed-cell foam with an intumescent coating where North Hills code requires it, and we cut the foam back from any ignition source. It’s the kind of detail that matters when the garage is 3 feet from a stucco wall that’s been there since Eisenhower was president.
Trusted Brands We Service in North Hills
We install and service Icynene and Demilec spray foam systems, and we keep Owens Corning and Rockwool products moving through our supply chain for North Hills jobs. That means when a 1961 North Hills addition needs a hybrid approach, closed-cell spray foam on the roofline and mineral wool batts in the walls, we’re not improvising from whatever’s left in the truck. North Hills customers don’t wait on shipped-in materials. We have the product pipeline set up so the right foam and the right batts show up on the right day.
Common Spray Foam Insulation Problems We See in North Hills Homes
- Collapsed 1950s fiberglass batts. The original R-7 batts in North Hills attics have been cooking under 150°F summers for 65 years. They compress, they settle, and they look like a thin gray blanket. Homeowners think the attic is insulated because something is up there. It isn’t doing anything.
- Sun-cooked duct insulation. The flex ducts in North Hills attics deteriorate faster than the insulation. The outer jacket cracks, the inner fiberglass falls off, and condensation drips onto the drywall below. Spray foam alone won’t fix that. The ducts have to be sealed and re-insulated or replaced first.
- Bypass gaps from additions and conversions. 91343 is full of ranches that got a family room added in the 70s or a garage converted in the 90s. The seam between old framing and new leaves a 1-inch air gap that dumps hot Valley air into the house. Spray foam will only work if those gaps are sealed before or during the foam install.
- Low-slope roofs with no ventilation. A lot of North Hills homes have low-slope or nearly flat roof sections. Without proper venting, spraying foam on the underside of the roof deck can trap moisture. We evaluate roof slope and existing venting before recommending open-cell vs. closed-cell or a vented vs. unvented assembly.
Pricing for Spray Foam Insulation in North Hills, CA
Open-cell spray foam in North Hills runs $2.50 – $4.00 per board foot installed. Closed-cell runs $4.50 – $7.00 per board foot. A typical 1,200-square-foot ranch attic air-sealed and sprayed to R-38 lands around $5,000 – $7,500. A garage ceiling job runs $2,200 – $5,800. A rim joist and crawl space package runs $1,800 – $4,200. What moves the number: roof slope and access, whether old batts need removal first, whether ducts need sealing, and whether there’s existing rodent or water damage in the attic. Call (866) 393-6041 for a free estimate. We’ll give you the number before we leave.
We Also Serve Cities Near North Hills
Our North Hills crews regularly work in Northridge, Van Nuys, Valley Glen, and San Fernando. If you’re in one of those neighborhoods, call (866) 393-6041 and we’ll tell you when we’re in your ZIP next. Same pricing. Same crews.
Serving North Hills, CA — Our Local Coverage Area
We’re based in the North Hills 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 Hills
No. We remove the old batts first. In North Hills attics where temps hit 140 – 150°F, the original fiberglass has collapsed to less than an inch of loft and is full of decades of Valley dust. Spraying over it traps that heat and moisture against the drywall and reduces the foam’s adhesion. Removal is straightforward and included in our estimate. Call (866) 393-6041 and we’ll inspect the attic before quoting anything.
Because North Hills sits in the Valley’s hottest interior pocket, so a garage ceiling here gets hit with direct radiant load from a low-slope roof that coastal LA homes don’t experience. In a 1950s North Hills ranch, the uninsulated garage ceiling can radiate 120°F into the wall it shares with the house, and into the bedroom above if it’s been converted. That’s not a coastal problem. It’s a North Hills problem. (866) 393-6041 for a garage quote.
We spray directly on the underside of the roof deck in most cases. Low-slope roofs in North Hills ranches typically don’t have enough attic clearance for us to crawl around and properly air-seal the attic floor first, so the roof-deck approach works better. The key is using closed-cell foam in a thin enough layer to hit the R-value target without adding so much thickness that we trap moisture against the sheathing. We’ve done this on dozens of Nordhoff Street and Parthenia Street ranches.
Repair means replacing or adding blown-in insulation in the original attic space. Retrofit means air-sealing the entire plane where old framing meets the addition, dealing with the different roof pitches, and spraying foam where batts can’t work. In North Hills, most homes that got additions in the 70s and 80s need a retrofit, not a repair. The gap between old and new framing is the real problem. We’ll tell you which one your house actually needs before quoting a number.
We use Icynene open-cell for garage ceilings where sound control matters and closed-cell for crawl spaces and rim joists where moisture and air sealing are the priority. We’re qualified on both Icynene open-cell and Demilec closed-cell systems, so we pick based on the space, not based on what’s still on the pallet. That’s the whole point of working with a company that carries eight brands and three methods instead of one product line. Call (866) 393-6041 for specifics on your house.
If your North Hills house was built between 1950 and 1970 and hasn’t had the attic touched since, call us before you spend another summer paying to cool a house that’s leaking air through original batts and sun-cooked ducts. Estimates are free. (866) 393-6041.
Written by Garrett Lund, Owner at Laguna Hills Insulation, serving North Hills since day one.