Fast, Reliable Spray Foam Insulation Across Van Nuys
Spray foam insulation in Van Nuys is almost never a simple cavity fill. Most of the housing stock here went up between 1945 and 1955, and the original wall and attic insulation in those tract bungalows is now crushed rock wool, bare kraft paper, or nothing at all. That means a real spray foam job in this neighborhood starts with stripping out what’s failed before we ever pull the trigger on a foam pass. Our crews know the 91401, 91405, 91406, and 91411 blocks well enough to anticipate what’s behind the stucco before we cut in. If you’re dealing with a hot attic, a drafty addition, or a garage that’s unusable by 2 p.m. in August, call (866) 271-1602 and we’ll walk the property with you.
Why Fontana Insulation Is Van Nuys’s Preferred Spray Foam Insulation Company
We’re a material-agnostic Spray Foam Insulation specialist, not a dealer pushing one brand. That matters in Van Nuys because the right foam for a 1948 wood-frame bungalow with knob-and-tube wiring is not the same as the right foam for a 2005 stucco box off Sepulveda. We carry Icynene and Demilec as our spray foam lines because both have the performance-testing history to stand behind air-sealing claims. We also carry Knauf, CertainTeed, and Rockwool for the cases where spray foam is not the answer at all. Noel Arredondo runs our crews and will tell you straight when a blown-in retrofit or mineral wool batt makes more sense than foam. That’s the point of working with a specialist who stocks eight brands across four material categories. The recommendation comes from the house, not from what’s cheapest in the warehouse.
Crawl Space Spray Foam Insulation in Van Nuys
Crawl Space Spray Foam Insulation in Van Nuys is one of the highest-return jobs we do on the small stucco bungalows that dominate the 91405 and 91406 ZIP codes. These homes sit low to the ground, and the crawl space under the floor is often vented straight to the outside. In winter that means cold air migrates up through the floorboards. In summer it pulls in hot Valley air and bakes the underside of the house. Closed-cell foam applied to the crawl space walls and rim joist stops both directions of heat movement and seals out the dust and rodent traffic that older Van Nuys homes accumulate under the floor.
What the job looks like
We access the crawl space, check for existing vapor barrier and any wiring or plumbing in the way, then spray the perimeter walls and rim joist with closed-cell foam. On most Van Nuys bungalows this is a half-day job. We keep the access point covered and we do not leave the site until the foam has set.
Cost and timing
Most crawl space spray foam jobs in Van Nuys run between $3,200 and $6,800 depending on square footage and how cramped the access is. Tight crawl spaces under older homes take longer, and labor reflects that. Call (866) 271-1602 and we’ll give you a number based on the actual space, not a guess.
Garage Spray Foam Insulation in Van Nuys
Garage Spray Foam Insulation in Van Nuys turns a garage from a heat trap into usable square footage. The attached garages on postwar tract homes here share a wall with the living space and often have an uninsulated ceiling under the roof deck. By June the garage hits 100°F by mid-morning and that heat bleeds through the shared wall into the house. We spray closed-cell foam on the garage ceiling and the shared wall, and if the garage door is the thin steel original, we can quote a panel insulation retrofit at the same time.
Workshop garages and rental units
A lot of Van Nuys garages do double duty as workshops, band practice spaces, or unpermitted rental conversions. Spray foam handles those better than fiberglass because it air-seals the gaps around the door track, the slab edge, and the wall-to-ceiling junction that batt insulation just drapes over. Homeowners on Hazeltine and Kester who work in their garages all day report the biggest change in comfort, because the foam stops the hot air from entering in the first place.
What to budget
A single-car garage ceiling and shared wall in Van Nuys typically runs $1,800 to $3,400. A detached garage with all four walls and the ceiling done runs higher, usually $4,000 to $7,500. The difference comes down to surface area and whether we’re working around stored cars and equipment. Estimates are free and we’ll come out to the property to measure.
Trusted Brands We Service in Van Nuys
We install and service Icynene and Demilec spray foam in Van Nuys because both brands have deep documentation on long-term R-value retention and air-sealing performance. Neither gets soft in a hot Valley attic, and both cure predictably even in the shallow roof assemblies common on low-pitch tract homes. For homes where foam is the wrong call, we stock Knauf fiberglass, CertainTeed fiberglass, and Rockwool mineral wool. Rockwool in particular gets pulled off the truck here more often than in coastal markets, because its fire resistance matters when you’re insulating around older wiring. We carry local inventory for all of these, so Van Nuys jobs do not wait on a warehouse order.
Common Spray Foam Insulation Problems We See in Van Nuys Homes
- Crushed rock wool and chewed kraft paper behind the walls. The original insulation in 1940s tract homes is often rodent-soiled and packed flat. You cannot spray foam over it and expect a good seal. We strip it out first, every time.
- Knob-and-tube wiring in wall cavities. Live K&T is common in Van Nuys bungalows. Foam sprayed directly over live K&T traps heat against the wire. We tape off and re-insulate around it before spraying, then document what we did.
- Shallow attics that hit 140°F or higher. Low-pitch roofs on Van Nuys tract homes heat up fast. Foam sprayed onto a 150°F roof deck off-ratio cures, bubbles, and loses adhesion. Our crews stage passes around the heat instead of spraying continuously.
- Flat and low-slope roof decks sealed too tight. Valley heat pushes moisture into roof assemblies that have no vent path. We look at the existing venting before we recommend foam on a flat or near-flat roof. Sometimes the right answer is a vented assembly, not more foam.
Pricing for Spray Foam Insulation in Van Nuys, CA
Closed-cell spray foam in Van Nuys runs $1.10 to $2.30 per board foot installed, with most whole-wall retrofits landing between $4,500 and $9,800 depending on cavity depth and prep work. Open-cell runs $0.60 to $1.20 per board foot. A rim joist package on a small bungalow is usually $1,400 to $2,800. Attic roof decks in shallow low-pitch homes start around $3,000 and go up with surface area. The biggest cost variable in Van Nuys is strip-out work: pulling the failed rock wool and kraft paper, rodent cleanup, and K&T prep adds labor that a clean-cavity new build never incurs. That’s the honest reason two similar-looking houses can quote differently. We’ll walk you through the numbers at your property, for free.
We Also Serve Cities Near Van Nuys
Fontana Insulation runs crews from Van Nuys into Valley Glen, Sherman Oaks, Encino, and North Hills every week. If you’re in one of those neighborhoods and need spray foam or a full insulation retrofit, we’ll schedule the same assessment we do in Van Nuys proper. Same crew, same eight-brand toolbox, same answer-first approach.
Serving Van Nuys, CA — Our Local Coverage Area
We’re based in the Van Nuys 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 Van Nuys
No, and you shouldn’t want that. The old rock wool and kraft paper in those walls is usually crushed, rodent-soiled, and packed against the sheathing. Spraying foam over it traps moisture against the old material and hides any wiring defects behind an inaccessible shell. We strip the cavity clean first, deal with any knob-and-tube, then spray closed-cell into an open cavity. It costs more in labor, but it’s the only way the foam performs and the wall stays dry.
Yes, and it’s one of the most common jobs we do. A garage ceiling and shared wall spray foamed with closed-cell drops the indoor temperature enough that the space stays usable through August. The foam also seals the dust and exhaust gaps that make a workshop miserable. Budget $1,800 to $3,400 for a single-car attached garage. Call (866) 271-1602 and we’ll measure yours.
We do not spray onto a 140°F-plus roof deck. Foam applied to a substrate that hot cures off-ratio, bubbles, and can lose adhesion within weeks. Our crews stage the work: spray early morning, pause through the midday heat, resume late afternoon, or stage passes across multiple days on the worst stretches. The cure is better and the foam stays bonded. Calling it out upfront saves you the cost of a failed first application.
Yes, but the sequence matters. We tape off the K&T runs, re-insulate them, then spray closed-cell around them. Foam directly over live knob-and-tube traps heat and creates a fire hazard. We document the prep work in writing because you’ll want that record when the house gets sold or the electrical gets upgraded later. Any contractor who tells you K&T and foam are fine together without prep is not being straight with you.
For most Van Nuys bungalows, yes. Cold floors in winter and hot floors in summer both trace back to an unsealed crawl space. Closed-cell on the perimeter walls and rim joist stops the air movement that’s been conditioning your floor from underneath. Most jobs run $3,200 to $6,800 and the comfort change is immediate. Call (866) 271-1602 and we’ll crawl the space and show you what’s actually happening under there.
Get a Straight Answer on Spray Foam in Van Nuys
If your Van Nuys house is hot in summer, cold in winter, or both, call (866) 271-1602 and ask for an assessment. We’ll walk the attic, the walls, the crawl space, and give you the material recommendation that fits the house, not the one that fits our inventory. Noel Arredondo and our crew work all over Van Nuys, from the 91401 blocks near the airport up through the 91405 and 91406 tracts. You’ll get a written quote, the strip-out scope if your walls still have the original rock wool, and no pressure to buy foam if foam isn’t the answer.
Written by Noel Arredondo, Owner at Fontana Insulation, serving Van Nuys and the San Fernando Valley.