Fast, Reliable Attic Insulation Across North Hills
Attic insulation in North Hills usually runs $1,800 to $5,400 for a full retrofit of a 1950s tract home, with blown-in fiberglass to R-49 landing between $2,200 and $3,800. Most North Hills jobs we complete in a single day. If you’re dealing with a hot upstairs, rooms that never hold temperature, or summer electric bills that make you wince, call us at (833) 390-3099. We know these attics. North Hills homes built in the 1950s and 60s have specific problems that a generic insulation crew misses, and that’s where we do our best work.

Why Fountain Valley Insulation Is North Hills’s Preferred Attic Insulation Company
North Hills homeowners call us because we actually understand the housing stock here. The single-story stucco-over-wood-frame tract homes that fill 91343 and 91393 were built fast in the post-war boom, and their attics show it. Original kraft-faced rock wool batts have collapsed or gone missing entirely. Vent slots are comically undersized for modern insulation levels. And a surprising number of these attics sit over rooms with plaster walls, not drywall, which changes how you approach any dense-pack blow. We see these conditions every week. That local familiarity means we arrive knowing what to look for, not figuring it out on your roof.
Nate Calloway built Fountain Valley Insulation around a simple idea: carry the right materials and match them to the house. Most contractors push one brand and one method. We don’t. We carry eight manufacturer lines including Rockwool, CertainTeed, Icynene, and Demilec. That means a North Hills homeowner with a 1956 tract house gets recommended Owens Corning blown-in fiberglass if that’s the right fit, not whatever happens to be on the truck. It’s a different way to work, and it’s why North Hills customers keep referring us to neighbors along Sepulveda Blvd, around Plummer St, and through the side streets off Woodley Ave.
Response time matters when your attic is hitting 150°F and your AC is running nonstop. We schedule North Hills calls promptly, usually within a few days of your call depending on crew availability. Estimates are free. The phone number is (833) 390-3099.
Attic Mold Removal in North Hills
Attic mold removal in North Hills typically costs $800 to $3,000 depending on the affected square footage and whether the mold has reached the sheathing or rafters. The process involves removing contaminated insulation, treating the affected framing with antimicrobial agents, and addressing the source: poor ventilation from those undersized 1950s vent slots. In North Hills, most attic mold we find traces back to inadequate airflow rather than roof leaks, because our dry climate keeps rain out but can’t move hot air through slots sized for almost no insulation.
What Triggers Mold in These Attics
The original vent slots in North Hills tract homes were designed when insulation meant maybe 3 inches of rock wool, if anything. When homeowners add thicker insulation without re-sizing vents, the attic can’t breathe. Warm air condenses on the underside of the roof deck during cool winter nights, and mold takes hold. We’ve seen this pattern repeatedly in homes along the Sepulveda Blvd corridor and throughout the 1950s subdivisions near Lassen St.
Our Removal Process
We pull the contaminated material, treat the framing, and then discuss ventilation before any new insulation goes in. Skipping the vent re-size means the mold returns. That’s the step generic insulation crews skip, and it’s the step that makes the difference in North Hills attics.
Attic Insulation Removal in North Hills
Attic insulation removal in North Hills runs $1.50 to $3.50 per square foot for labor, with most full attic cleanouts on a 1,200-square-foot home landing between $1,800 and $4,200. We remove collapsed rock wool batts, old blown-in material, rodent-damaged insulation, or anything left behind by prior owners. In North Hills specifically, removal is often the first step before a proper re-insulation because the original kraft-faced rock wool from the Eisenhower era has crumbled, compacted, or vanished from large sections of the attic floor.
When Removal Makes Sense
If your attic still holds original 3-inch rock wool, you’re not adding new insulation on top and calling it done. That old material is doing almost nothing. In many North Hills attics, we find bare cavities where batts have completely disintegrated. Removal gives us a clean surface to air-seal top plates, wire penetrations, and the attic hatch before new insulation goes in.
Older Multifamily Buildings
North Hills has a substantial stock of older multifamily rental buildings, particularly along Sepulveda Blvd. Many of these buildings never had attic insulation at all. Removal applies here when there’s contamination, rodent activity, or just decades of debris. We work with property owners on these surveys, and the process is straightforward: assess, remove, prep, reinsulate.

Trusted Brands We Service in North Hills
Fountain Valley Insulation isn’t married to one manufacturer. We carry Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber. For North Hills homes, that lineup matters because your 1950s attic may call for something specific. A homeowner interested in fire-resistant mineral wool gets Rockwool, not a blank stare. Someone who wants spray foam gets Icynene or Demilec closed-cell, properly installed. And a homeowner with sustainability in mind gets GreenFiber recycled-content blown-in fiber. We stock materials and parts in our Fountain Valley yard, so North Hills jobs don’t stall waiting on supply runs.
Common Attic Insulation Problems We See in North Hills Homes
- Undersized original vent slots. The 1950s vent slots in North Hills attics were sized for almost no insulation. Adding R-49 without re-sizing the vent area chokes airflow, and the attic becomes a convection oven in July.
- Collapsed or missing rock wool batts. The original kraft-faced batts have compressed to R-3 or fallen apart entirely, leaving bare cavities that let heat pour through the ceiling of your living space.
- Plaster walls complicating dense-pack blows. Many North Hills homes from this era have plaster rather than drywall. Dense-packing wall cavities requires experience with plaster’s refusal to flex, and a blown hole or cracked wall is the result of inexperience.
- Attic air temperatures exceeding 150°F. Inland Valley summers push attic temps far past 150°F. That heat radiates down through under-insulated ceilings all night, and it’s why a proper R-value upgrade delivers the highest ROI of any home improvement in North Hills.
Pricing for Attic Insulation in North Hills, CA
Attic insulation pricing in North Hills depends on the scope, but here are the ranges we quote regularly. Blown-in fiberglass to R-49 on a 1,200-square-foot attic: $2,200 to $3,800. Attic batt insulation replacement: $1,800 to $3,200. Attic insulation top-up only: $1,200 to $2,400. Attic insulation removal with cleanup: $1,800 to $4,200. Spray foam closed-cell on the roofline: $4,500 to $9,000 depending on square footage and foam depth. Attic mold removal: $800 to $3,000. Baffle installation and vent re-sizing: $600 to $1,800. These are real ranges for North Hills, not national averages. Every estimate includes a full attic inspection so you know what you’re paying for before any work starts.
We Also Serve Cities Near North Hills
Our crews are in the Valley every week. Beyond North Hills, we handle Attic Insulation work in Northridge, Van Nuys, Valley Glen, and San Fernando. If you’re in one of those neighborhoods and dealing with the same 1950s tract home attic issues, we know the housing stock just as well there. One call covers all of it: (833) 390-3099.
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 Attic Insulation in North Hills
Most North Hills attics hold original 1950s rock wool that has collapsed to R-3 or disintegrated entirely, so adding new insulation on top locks in the problem rather than fixing it. We recommend removal first, then air-sealing, then new material. Call (833) 390-3099 for an inspection and quote.
We re-size the vent area and install eave baffles before any new insulation goes in. Those original slots were designed for almost no insulation, and skipping this step causes poor ventilation and potential moisture issues. Estimates include the vent work, so call (833) 390-3099 if you’re planning an upgrade.
Yes. Plaster walls require a different hand than drywall, but our crews do dense-pack blows in plaster homes regularly without cracking walls or blowing out lathe. We assess the wall condition during the estimate and adjust the approach accordingly. Call (833) 390-3099 to schedule a look.
We recommend R-49 for attic floors in North Hills, which is current Title 24 guidance and what the climate demands when attic temps exceed 150°F. If you’re on the original 3 inches, that’s the difference between a hot upstairs and a comfortable one. Call (833) 390-3099 for a free estimate.
Yes, we do full attic mold removal, including contaminated insulation removal, framing treatment, and ventilation correction. In North Hills, the mold source is almost always undersized venting from the original 1950s construction. We fix the cause, not just the symptoms. Call (833) 390-3099 to schedule an assessment.
If your attic is under-insulated, over-heated, or holding mold, call Fountain Valley Insulation at (833) 390-3099. We serve all of North Hills, including the neighborhoods around Sepulveda Blvd, Plummer St, Lassen St, and Woodley Ave. Estimates are free, and we’ll tell you exactly what your attic needs, whether that’s Attic Insulation in North Hills removal, vent work, or a full re-insulation to R-49.
Written by Nate Calloway, Owner at Fountain Valley Insulation, serving North Hills and the San Fernando Valley.