Fast, Reliable Attic Insulation Across North Hollywood
Attic insulation in North Hollywood typically costs $1,800 – $4,200 for a full blow-in or batt install on a standard 1,200 – 1,800 sq ft bungalow, and we’re usually on site within 1 – 2 business days. If your west-facing rooms bake through summer afternoons, that’s the San Fernando Valley sun hitting an under-insulated attic, and it’s a problem we solve almost every week across 91601, 91605, and 91606. Call (833) 390-7079 for a straight answer and a free estimate.
Why Airtight Insulation Co Is North Hollywood’s Preferred Attic Insulation Company
We work a lot in North Hollywood because the housing stock here is specific: 1920s – 1950s stucco bungalows, shallow attics, original knob-and-tube wiring, and walls with no accessible cavities. That combination frustrates homeowners who got a generic quote from a crew that mostly works new construction. Our teams know the older blocks around Bakman Ave, Cahuenga Blvd, and the flats off Oxnard before they arrive, so the estimate reflects what’s actually behind your walls and above your ceiling. Ruben Acosta, who leads our crews, has walked enough North Hollywood attics to know what a shallow roof pitch and plaster-over-lath means for access and install time. We carry eight insulation brands and match the material to the job, not to what’s sitting in the warehouse. That’s why homeowners from the NoHo Arts District to Valley Plaza keep our number.
What sets us apart in North Hollywood is the same thing that matters on every retrofit: we seal it, not just fill it. Air sealing top plates, can lights, and plumbing penetrations before insulation goes in is the difference between a job that looks Insulated and one that actually lowers the July electric bill. If you’re searching for Attic Insulation work done once, correctly, we’re the call to make.
Attic Mold Removal in North Hollywood
Attic Mold Removal in North Hollywood is usually triggered by one thing: a bathroom exhaust fan venting into the attic instead of through the roof, which is common in houses built before ventilation codes tightened. Mold grows during our mild, humid winter months, then bakes into the framing through summer. A typical attic mold remediation on a North Hollywood bungalow runs $1,200 – $2,800 depending on square footage and whether we’re replacing insulation afterward. If you’re seeing dark staining on the underside of the roof sheathing or smelling mildew when the attic hatch opens, call us before adding new insulation on top of a problem.
Containment and Treatment
We set up negative air pressure and treat affected framing with a commercial fungicide. Then we address the source: vent the bath fan properly, add soffit and ridge ventilation, and dry everything before insulation goes back in. If we skip the source, the mold returns within a season.
Insulation Replacement After Remediation
Once the space is dry, we remove the contaminated insulation and install fresh material matched to your attic’s depth and venting. In most North Hollywood attics, that means blown-in fiberglass or cellulose at R-38 to R-49. We don’t put new insulation over mold, and we don’t leave you with a half-finished attic.
Attic Insulation Removal in North Hollywood
Attic Insulation Removal in North Hollywood is most often needed when a previous contractor blew insulation over knob-and-tube wiring, creating a fire hazard, or when rodents have contaminated the existing material. Removal on a standard 1,000 – 1,500 sq ft attic runs $1,000 – $2,200 including disposal. The older the bungalow, the more likely you’re dealing with wiring that predates modern insulation practices. If you see old, flattened batts or evidence of rat activity, removal is the right first step, not a top-up.
Knob-and-Tube Wiring Complications
Original 1920s – 1950s homes in 91601 and 91605 often have live knob-and-tube circuits. Insulation over that wiring traps heat and violates code. We coordinate with a licensed electrician to verify the wiring is decommissioned or protected before we blow anything in. Homeowners who skip this step find out later when an inspector flags it.
Rodent and Contamination Cleanout
North Hollywood’s alley-load garages and older roof lines give rats and squirrels plenty of entry points. When they nest in your attic, the insulation becomes a health issue. We remove it all, sanitize the decking, and seal obvious entry points before installing fresh material. Then we can add blown-in insulation on top of a clean, safe surface.
Trusted Brands We Service in North Hollywood
We don’t push one product line. We carry Owens Corning and Johns Manville fiberglass for standard attic retrofits, Demilec spray foam for air-sealing rim joists and hard-to-reach cavities, and GreenFiber cellulose for homeowners who want recycled-content material. For North Hollywood customers, we keep common material stocked locally so a top-up or partial replacement doesn’t wait on a warehouse order. Eight brands, one contractor. The job picks the product, and you get the warranty that comes with it.
Common Attic Insulation Problems We See in North Hollywood Homes
- Knob-and-tube wiring under old insulation. Original 1920s – 1950s bungalows often still have live circuits buried under fiberglass, which is unsafe and flagged by inspectors. We verify wiring status before adding insulation, every time.
- Shallow attics with no air sealing. Many North Hollywood attics have less than 18 inches of clearance at the eaves. Crews skip top-plate sealing because it’s awkward to reach, then wonder why the upstairs stays hot. We get low and seal it right.
- Bath fans venting into the attic. Pre-1980s homes often exhaust moist air directly into the attic. That causes mold on the sheathing and degrades insulation. We redirect vents through the roof as part of the job.
- West-facing rooms that don’t cool down. The San Fernando Valley sun pounds west exposures from 2 PM onward. Without adequate attic insulation and air sealing, the upstairs never recovers. R-49 in the attic is the baseline for local summer heat.
Pricing for Attic Insulation in North Hollywood, CA
Here’s what North Hollywood homeowners can expect to pay in 2026. Blown-in attic insulation to R-38 on a 1,200 sq ft bungalow typically runs $1,800 – $2,600. Attic batt insulation for the same footprint lands between $2,200 – $3,400, depending on access. Top-ups run $1,200 – $1,800 when existing insulation is dry and wiring is safe. Full attic insulation replacement, including removal and disposal, runs $2,500 – $4,200. Demilec spray foam on attic rooflines runs $3,800 – $6,500 for an open-cell application. These are the numbers we quote on site, and the estimate is free. Call (833) 390-7079 and we’ll measure your attic, check the wiring, and give you a fixed price.
We Also Serve Cities Near North Hollywood
Our crews work across the Valley, including Studio City, Universal City, Burbank, and Valley Glen. If you’re right at the border, we’re already close. See our North Hollywood service page for specifics on coverage and response times across the immediate area.
Serving North Hollywood, CA — Our Local Coverage Area
We’re based in the North Hollywood 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 Hollywood
Yes, but only after the wiring is decommissioned or protected. We coordinate with a licensed electrician to confirm the scope, then we insulate. Blowing insulation over live knob-and-tube is unsafe and against code. Call (833) 390-7079 and we’ll walk you through what needs to happen first.
We blow insulation through the exterior stucco. On 1920s – 1950s homes, walls are plaster over lath with no accessible cavities, so interior drilling doesn’t work. We drill through the stucco from the outside, blow in the material, and patch each hole to match. Your plaster stays intact.
Yes. We work alley-load garages and tight access jobs regularly across North Hollywood. Our crews bring compact equipment and plan parking so we don’t block neighbors. If the attic hatch is small, we adjust the install method to fit the space.
If you see staining on the roof sheathing or smell mildew in the attic, yes, remove the mold first. Adding insulation over active mold traps moisture and makes it worse. We treat the affected area, fix the moisture source, then insulate. Call (833) 390-7079 for an honest assessment.
We recommend R-49 for attics in North Hollywood. Summer highs in the 90s – 100s°F put sustained load on your ceiling, and R-38 is acceptable but R-49 is the target for real heat rejection. Air sealing matters as much as the R-value. We do both.
Get an Honest Quote for Your North Hollywood Attic
If your attic is too hot, too cold upstairs, or you’re not sure what’s up there, call (833) 390-7079. We’ll come out, look at the wiring, measure the space, and tell you what actually needs to happen. No pressure. No one-size-fits-all quote. Just a straight answer from a team that knows North Hollywood’s houses better than most. Free estimates, honest pricing, and the right material for your specific situation.
Written by Ruben Acosta, Owner at Airtight Insulation Co, serving North Hollywood and the San Fernando Valley.