Insulation Company in North Hills, CA
Blown in insulation is the workhorse retrofit for North Hills homes, and it’s where most of our calls from the 91343 ZIP start. The post-war ranch and mid-century tract homes here were framed when energy was cheap, so many attics still sit at R-4 or bare plywood. We’re Hollywood Insulation Co, and we install blown in insulation, attic insulation, and spray foam across North Hills with one goal: cut the heat load that turns these houses into ovens from June through September. Call (866) 605-6949 when you’re ready to talk about your attic.
Why North Hills Homes Are Different
North Hills sits in the hottest part of the San Fernando Valley. Summer attic temperatures routinely exceed 150°F, and the sun beats down on low-pitch roofs that leave very little buffer between the shingles and your ceiling. We schedule summer attic work at dawn for a reason: by 10 a.m., the space is unsafe to work in without ventilation and pacing. The homes themselves are largely 1950s through 1970s single-story ranches with original wood framing. Many still have knob-and-tube or early romex wiring running through the attic floor, which has to be mapped and worked around before any new material goes in.
The shallow attic spaces on these lots make retrofit installation tight. There’s rarely room to stand, and access hatches in hallway ceilings are often the only way in. That changes how we approach every job: the material has to be blown to a precise depth without burying soffit vents or piling against the roof deck. North Hills is dry, with prolonged 100°F-plus stretches in summer and cool but not freezing winters. The insulation priority here is heat gain, not freeze protection. A high-R attic upgrade with proper air flow makes a bigger difference in this climate than almost any other improvement you can make to a 1950s ranch. If you’re starting from a bare attic, even a professional blown in cellulose or fiberglass installation at code depth changes how the whole house feels by the next heat wave.
Our Main North Hills Services
Most North Hills homeowners call us about two things: getting their under-insulated attic up to modern R-value, and sealing the building envelope with spray foam where air leaks are driving bills up. Here’s how each one works in this part of the Valley.
Attic Insulation in North Hills
Attic insulation is the highest-impact retrofit for a North Hills ranch, and we install batt, blown in, and spray foam depending on the attic’s condition, depth, and wiring layout. Homes here often have original R-4 to R-11 fiberglass batts that have settled, been disturbed by electricians, or never reached the eaves. We measure existing depth, check for gaps over wall plates and can lights, and build to a clean, even R-value across the attic floor. Tight access and low-pitch roofs are normal on 91343 lots, so the job usually moves through a hallway hatch with a hose and a headlamp. Learn more on our Attic Insulation in North Hills page.
Spray Foam Insulation in North Hills
Spray foam does two jobs at once in North Hills: it insulates and air-seals the irregular framing where heat and dust get through. We install Icynene open-cell for interior cavities and Demilec closed-cell for roof decks and rim areas that need moisture resistance and higher R-value per inch. On a 1950s tract home with original sheathing, air leakage is often worse than low insulation levels, and spray foam is the only material that addresses both in one pass. The heat here means we schedule foam work early, and we watch substrate temperatures before spraying. See the full breakdown on our Spray Foam Insulation in North Hills page.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Blown In Insulation in North Hills
Blown in insulation is the most common retrofit we install in North Hills because it’s fast, fills irregular cavities, and works around the old wiring and framing that come with 1950s and 1960s tract construction. When an attic is bare or sitting at R-4 and the summer ceiling hits 100°F by 4 p.m., blowing in high-density fiberglass or cellulose to R-38 or R-49 is the single most effective fix. Most North Hills jobs are done in one day, including prep, install, and cleanup. For a fuller look at the method itself, see our Blown In Insulation hub.
Cellulose Insulation
Signs you need it
Your attic floor is bare or has thin, settled material, and upstairs rooms stay hot long after the sun goes down.
What it costs in North Hills
Cellulose blown to R-38 in a typical North Hills attic generally runs $2,800 to $4,900, depending on square footage and attic access.
How we do it
We map wiring, air-seal penetrations, mark depth gauges, and blow recycled cellulose to a consistent R-value across the attic floor without blocking soffit vents.
Blown In Fiberglass Insulation
Signs you need it
Your attic has old, compressed fiberglass batts that aren’t reaching R-19 anymore, and you want a dust-free, high-R upgrade with no settling.
What it costs in North Hills
Blown in fiberglass to R-38 or R-49 in a North Hills ranch typically costs $2,100 to $4,300, with tighter attics on the higher end.
How we do it
We remove or level existing material where needed, lay down depth markers, and blow virgin fiberglass with a consistent texture across the attic floor, keeping eave vents open.
What Blown In Insulation Costs in North Hills
| Item | Typical range in North Hills |
|---|---|
| Cellulose blown in to R-38 (1,000 sq ft attic) | $1,700 – $2,900 |
| Fiberglass blown in to R-38 (1,000 sq ft attic) | $1,500 – $2,700 |
| Full attic prep, air sealing, and blow in to R-49 | $2,800 – $4,900 |
Square footage, attic depth, and wiring density move the price in North Hills. Older homes with knob-and-tube or low clearance take more prep time. Every estimate is line-itemed and free.
Can you blow insulation over old insulation in a North Hills attic?
Yes, in most cases. We can blow new fiberglass or cellulose over existing material as long as the old insulation is dry, not compressed, and free of rodent activity. We inspect first and tell you if removal is needed.
How long does blown in insulation last in the San Fernando Valley heat?
Fiberglass blown in insulation lasts the life of the home when it stays dry. Cellulose can settle 10 to 15 percent over decades, so we install with settlement in mind. Call (866) 605-6949 and we’ll walk you through both options.
Brands We Service in North Hills
We install CertainTeed and Johns Manville fiberglass, Icynene and Demilec spray foam, and GreenFiber recycled cellulose in North Hills. Material is stocked locally in the Valley and available for most jobs within a few days. See the full breakdown on our brands page.
Pricing for Insulation Company in North Hills, CA
| Service | Typical range in North Hills |
|---|---|
| Blown in fiberglass attic insulation (R-38, 1,000 sq ft) | $1,500 – $2,700 |
| Blown in cellulose attic insulation (R-38, 1,000 sq ft) | $1,700 – $2,900 |
| Full attic prep, air sealing, and blow in to R-49 | $2,800 – $4,900 |
| Spray foam rim joist sealing | $900 – $1,800 |
| Spray foam roof deck (closed-cell, 500 sq ft) | $3,000 – $5,500 |
| Batt insulation for accessible walls or garage | $800 – $1,600 |
| Attic air sealing only (top plates, penetrations, hatch) | $600 – $1,400 |
| Whole-attic audit, removal, and re-insulation | $3,500 – $7,500 |
North Hills attics with low clearance, original knob-and-tube wiring, or rodent damage push prices toward the upper end because prep and safety work take longer. Summer scheduling is tight, and dawn work is common. You’ll get a fixed, upfront price before we start, no surprises.
Neighborhoods We Serve in North Hills
We cover all of North Hills including the 91343 and 91393 ZIP codes. Most of our work is along the residential grid east of Sepulveda and west of the 405, where the post-war tract homes sit in neat rows with near-identical attics and very similar heat problems.
- North Hills West
- Sepulveda corridor north of Roscoe
- The ranches east of Woodley
- 91343 residential grid
- Neighborhoods around North Hills Community Park
Response time in North Hills is usually same-day or next-day for estimates, with installation scheduled within one to two weeks depending on material and attic temperature windows.
Service Area – Cities Near North Hills
Our trucks run the whole central and west San Fernando Valley, so North Hills jobs often book alongside work in Northridge, CA, Van Nuys, CA, Valley Glen, CA, and San Fernando, CA. Same climate, similar housing stock, same attic heat problems across the Valley floor.
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 Insulation Company in North Hills
We can usually get to a North Hills home within one business day, and often same-day if you call before noon. Estimates are free, take about 45 minutes, and include attic photos, depth measurements, and a written price.
Most insulation retrofits in North Hills don’t require a city permit. If your project involves structural changes or electrical work beyond insulation, we’ll tell you what’s needed before we start. We handle the insulation scope and coordinate around any other trades.
Yes. We schedule North Hills attic work at dawn during summer months and use ventilation and hydration protocols for the crew. Spray foam has substrate temperature limits, so some foam jobs move to early morning or cooler days.
Ready to get the attic fixed before the next heat wave? Call Hollywood Insulation Co at (866) 605-6949 for a free North Hills estimate. We’ll measure what you have, tell you what it needs, and give you a line-itemed price.
What happens when you call
- 1A real person answersNo phone trees — talk to a local insulation pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3A background-checked tech heads outLicensed & insured, typically within 30–60 min.
- 4You approve before work beginsNothing starts until you say go.
What North Hills Customers Say
"Attic was at maybe R-11 from the 1970s and blown in over the top would have just buried the problem. They removed the old material, air sealed the top plates and penetrations first, then blew in to R-49. The upstairs is a completely different house in August."
— Cole Sullivan"Found and sealed a gap around the chimney chase that was basically an open chimney to the attic."
— Brandon Wong"Work is good and the house is noticeably more comfortable. There was insulation debris left in the hall closet under the attic access that I had to clean up."
— Miguel Garcia