Fast, Reliable Spray Foam Insulation Across Van Nuys
Spray foam insulation in Van Nuys runs $2.80 – $5.50 per board foot for open-cell and $4.50 – $7.50 for closed-cell, with most attic retrofits landing between $4,500 and $12,000 depending on square footage and prep work. We serve every Van Nuys ZIP code, from 91401 and 91405 up through 91406 and 91411. If you’re sitting in a ranch home off Sepulveda Blvd with an attic that feels like a furnace by noon, we can help. Call (877) 265-5712 for a free estimate and we’ll tell you exactly what your attic needs, not what we happen to have on the truck.
Van Nuys isn’t a coastal microclimate. It’s a valley floor that bakes. Allen Decker built North Tustin Insulation around that reality, and our spray foam work here reflects it. We match open-cell or closed-cell foam to your specific roof deck, your framing, your ventilation situation, and the way your home actually behaves in a 104°F August. No guesswork. No generic pitch.
Why North Tustin Insulation Is Van Nuys’s Preferred Spray Foam Insulation Company
Most Van Nuys homes were built between 1940 and 1970, which means attics with settled fiberglass, disintegrated vapor barriers, and roof decks that hit 140°F by early afternoon. We’ve worked on enough of them to know what’s behind the drywall before we cut the first access hole. Allen Decker’s crew has sprayed foam in ranches along Victory Blvd, stucco tracts near Van Nuys High School, and low-rise apartment buildings off Van Nuys Blvd where access is tight and the attic is more crawlspace than room.
Being an insulation-only contractor matters here. We don’t split our attention between roofing, HVAC, or remodeling. Spray foam is what we do. We carry both Icynene and Demilec systems, so you’re getting open-cell or closed-cell chemistry that’s specified for your roof assembly, not whatever foam is on sale that month. And we’re the team other contractors in Van Nuys call when they encounter an unvented attic they don’t want to touch. Call (877) 265-5712 and you’ll talk to someone who can answer material questions on the first call.
Open Cell Spray Foam in Van Nuys
Open cell spray foam in Van Nuys homes typically runs $2.80 – $4.50 per board foot installed, and it’s the retrofit we recommend most often for the classic 1950s ranch with an unvented attic. The foam expands to fill every cavity and seals the roof deck from the inside, stopping the radiant heat gain that turns these attics into ovens. Unlike closed-cell, open-cell foam remains vapor-permeable, which matters in older Van Nuys attics where trapped moisture can silently rot framing. Allen Decker’s team has been through enough of these to know that prep work, vacuuming out the old degraded batt, is half the job.
The reason open-cell works so well in Van Nuys is specific to the housing stock. The mid-century ranch homes here were built with minimal overhangs and dark composition shingle roofs. They soak up heat all day. Sealing the underside of the roof deck with open-cell foam stops that heat from ever entering the living space. You feel the difference in the first summer. Your AC stops running at 7pm and keeps running because the house finally holds temperature.
Attic Roof Deck Sealing
On a typical Van Nuys ranch, we spray open-cell foam directly to the underside of the roof sheathing, from the eaves to the peak. This turns the attic into conditioned space and eliminates the need for gable vents or ridge vents, which often don’t move enough air anyway on a 100°F day. The foam also deadens the sound of planes taking off from Van Nuys Airport, which homeowners near the flight path notice immediately.
One note: if your attic has original batt insulation that’s compressed and blackened from decades of heat, we vacuum it out first. Spraying fresh foam over degraded material guarantees poor adhesion and eventual delamination. That’s a failure we’ve seen too often from crews that skip prep to save time.
Cathedral Ceilings and Bonus Rooms
Van Nuys ranches and split-levels often have cathedral ceilings or bonus rooms where the ceiling drywall attaches directly to the rafters. These spaces are brutal in summer. Open-cell foam shot into the rafter bays is the cleanest way to stop the heat without tearing out drywall. We drill access holes, spray, patch, and you’re left with a ceiling that doesn’t radiate heat into the room by 3pm.
Spray Foam Insulation Contractors in Van Nuys
When you hire spray foam insulation contractors in Van Nuys, you’re paying for two things: proper attic preparation and correct foam chemistry. Allen Decker’s crew handles both. A full attic retrofit in a Van Nuys ranch typically runs $5,500 – $11,000, with the prep work (vacuuming old insulation, sealing bypasses, protecting can lights and wiring) accounting for a real share of the cost. The cheap bids skip that step. We don’t. Spraying foam over dust, rat droppings, and degraded fiberglass is the fastest way to waste money on a delaminating mess.
This is where being an insulation-only contractor changes the outcome. A generalist will show up, spray, collect, and leave. We check the attic first. Is it vented or unvented? Is there knob-and-tube wiring that needs to be isolated first? Is the roof deck in good enough shape to seal? Those questions determine whether your foam retrofit actually works or just looks like it worked for the first few months. We know Van Nuys homes. We know what’s behind the access panel before we open it.
Retrofit Preparation and Removal
In older Van Nuys homes, the critical step is removing what’s already there. The original batt insulation in a 1950s or 60s ranch is usually compressed, dust-laden, and far below its original R-value. We vacuum it out, inspect the ceiling joists and wiring, seal any bypasses around flues and plumbing, and then spray foam onto a clean, dry surface. This is the prep work that determines whether the foam adheres properly.
If you have knob-and-tube wiring in an older Van Nuys home, we flag it immediately. Foam can’t contact live knob-and-tube because it traps heat. We can work around it with proper clearances and non-contact methods, but it needs to be documented and addressed. Not every contractor will even bring it up. Allen Decker does.
Closed-Cell for Detached Workshops
The detached garages and workshops scattered across Van Nuys’s residential lots are a different application entirely. These structures often have uninsulated walls, metal doors that conduct heat, and no vapor barrier. Closed-cell spray foam at $4.50 – $7.50 per board foot gives you both insulation and a built-in vapor barrier in one pass, which is the practical choice for a workshop you want to use year-round. It stiffens the structure too, which matters on the older stick-framed garages that are common off Vanowen and Sherman Way.
Trusted Brands We Service in Van Nuys
We spray both Icynene and Demilec foam systems, two of the most established names in residential spray foam. For Van Nuys attics that need open-cell performance, Icynene’s open-cell chemistry has been the most consistent we’ve used. For garages, workshops, and rim joist applications that call for closed-cell, Demilec’s HFO-blown foam delivers the vapor barrier and R-value density we’re after. We also carry Owens Corning fiberglass when foam isn’t the right answer for a specific section of your home. Carrying multiple brands means we recommend based on your roof deck and your budget, not on a single supplier’s pricing schedule. That’s the difference between an insulation specialist and a foam franchise. Van Nuys customers deserve the former.
Common Spray Foam Insulation Problems We See in Van Nuys Homes
- Foam sprayed over dust and degraded batts. In the ranch homes near Van Nuys Airport, the old insulation is often coated in a fine gray dust from the Sepulveda Basin and freeway traffic. Spraying over it means the foam bonds to the dust, not the roof deck, and delaminates within a year or two. We vacuum first, every time.
- Unvented attics done wrong. Many 1960s Van Nuys homes have attics that were never designed to be sealed. If you spray closed-cell foam in an unvented attic without addressing the existing moisture load, you trap humidity inside the assembly. We spec open-cell for these roofs unless there’s a structural reason to go closed-cell.
- Insufficient foam thickness. On a Van Nuys summer afternoon, the roof deck can reach 160°F. If the foam layer is too thin, you still get radiant heat bleeding into the living space. We spray to the thermal thickness that actually stops the heat, not the minimum thickness that satisfies a code inspector.
- Knob-and-tube wiring buried in foam. It’s still common in the oldest parts of Van Nuys. Foam encases the wiring, traps heat, and creates a fire risk. A legitimate contractor flags it and works around it. A rushed one buries it and moves on. We flag it.
Pricing for Spray Foam Insulation in Van Nuys, CA
Here are honest numbers for the Van Nuys market. Open-cell spray foam runs $2.80 – $4.50 per board foot installed. Closed-cell runs $4.50 – $7.50 per board foot. A typical ranch attic retrofit with vacuuming, air sealing, and open-cell foam on the roof deck costs $5,500 – $11,000. A detached garage or workshop with closed-cell walls and ceiling runs $3,200 – $6,800 depending on square footage. What moves the price? The size of the attic, whether old insulation needs removal, the accessibility of the roof deck, and whether knob-and-tube wiring needs to be worked around. We give free estimates, and the number we quote is the number you pay. Call (877) 265-5712 and we’ll come out to your Van Nuys home, inspect the attic, and put a fixed price in writing.
We Also Serve Cities Near Van Nuys
Our Spray Foam Insulation crews cover Van Nuys and the surrounding San Fernando Valley, including Valley Glen, Sherman Oaks, Encino, and North Hills. If you’re in any of those neighborhoods and dealing with a hot attic or a drafty garage, the same prep-first approach applies. Visit our Van Nuys page for more local detail, or call us directly and we’ll schedule a walkthrough.
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 any contractor who says yes should be shown the door. The original batt insulation in most Van Nuys homes is compressed, dust-caked, and degraded to the point where it won’t support proper foam adhesion. The foam bonds to the dust, not the roof deck, and the whole assembly can delaminate within a season or two. We vacuum the old material out first, inspect the framing, and spray onto a clean, dry surface. If you’re not sure what’s in your attic, call (877) 265-5712 and we’ll take a look before quoting anything.
Spray foam handles it better than any batt or blown-in product because it seals the attic rather than just slowing heat transfer. In a Van Nuys summer, your roof deck can hit 160°F and your attic air can exceed 140°F by early afternoon. Traditional fiberglass loses effectiveness as the temperature differential grows. Open-cell foam sprayed directly to the roof deck stops the radiant heat at the source, before it ever enters the attic cavity. That means your AC isn’t fighting a 140°F air mass. The difference is measurable in the first July bill.
Yes, but it has to be handled correctly. Foam can’t come into direct contact with live knob-and-tube wiring because it traps heat and creates a fire hazard. In older Van Nuys homes, this is common, and it doesn’t mean foam is off the table. It means the wiring needs to be identified, protected, and worked around using proper clearances. Allen Decker’s crew flags it during the initial inspection and builds it into the plan. We don’t bury it and move on. If you know or suspect you have knob-and-tube, mention it when you call (877) 265-5712 so we can plan accordingly.
Closed-cell spray foam is the right call for most detached workshops and garages in Van Nuys. It runs $4.50 – $7.50 per board foot and gives you both insulation and a vapor barrier in a single application. That matters in a structure that isn’t climate-controlled and sits directly on a slab. Closed-cell also adds structural rigidity to the older stick-framed garages common in this part of the Valley. If you’re using the workshop for woodworking, band practice, or just want it usable in August, closed-cell on the walls and ceiling is the most effective single investment you can make.
Yes, if the old insulation is compressed, dust-laden, or showing signs of moisture. In the 1940s – 1960s homes that make up most of Van Nuys, that’s almost always the case. The original batts have settled, blackened from decades of radiant heat, and collected a layer of fine dust from the Sepulveda Basin and nearby freeway corridors. Leave it in place and your new foam is applied over a failing substrate. Vacuum it out and you get a clean, adherent surface that will last decades. We include the removal in our quote. Call (877) 265-5712 for a free estimate and we’ll tell you exactly what’s in your attic and what it needs.
If your Van Nuys home is hot, dusty, and uncomfortable every summer, the problem is almost always the attic. Allen Decker and the North Tustin Insulation crew fix it from the roof deck down. Call (877) 265-5712 for a free estimate. We’ll inspect the attic, tell you what you have, what you need, and what it costs. No pressure, no guesswork, just a straight answer from someone who knows Van Nuys homes inside and out.
Written by Allen Decker, Owner at North Tustin Insulation, serving Van Nuys since the company’s founding.