Trusted Blown-In Insulation for Los Angeles Homeowners
Blown-In Insulation pricing in Los Angeles typically runs $1.80 to $3.50 per square foot installed, with most attic jobs at $2,400 to $5,800 depending on depth, material, and whether air sealing is needed first. Most Los Angeles homes built between 1945 and 1990 have original insulation below current code, and many neighborhoods from Silver Lake to Venice show the same pattern: hot second floors in summer, cold spots in January, and energy bills that climb faster than the thermostat setting. We’re Topside Attic Insulation Los Angeles, independently owned and operated under The Haven Standard since 2016, and we’ve sealed and insulated more than 9,000 homes across LA County. Every job starts with a written price before any work starts, and every job ends with a Documented Photo Record. Same-day estimates are available throughout Los Angeles, and a live person answers our phones 24/7 at (628) 226-1097.
What Our Blown-In Insulation Service Includes
Blown-In Cellulose
Blown-in cellulose is ground paper fiber treated with borate fire retardant, blown through a hose to fill attic floors and wall cavities to a specified depth. In Los Angeles, we see it perform especially well in older homes near Highland Park and Echo Park, where irregular joist spacing and multiple ceiling penetrations make batt insulation impossible to install properly. At Topside Attic Insulation Los Angeles, we source cellulose from GreenFiber and other manufacturers, and we never blow it over an unsealed attic floor. Our crews seal top plates, can lights, and plumbing penetrations first, then blow to the depth specified in your written scope, typically R-38 to R-60 for attics in Climate Zone 3.
Blown-In Fiberglass
Blown-in fiberglass is spun glass fiber, lighter and less prone to settling than cellulose, with higher R-value per inch. It’s the right choice when attic framing is shallow and every inch of headroom matters, which we encounter frequently in Mar Vista and Palms bungalows with 4:12 roof pitches and limited clearance. We stock Owens Corning and Johns Manville fiberglass systems, and our technicians calculate the coverage bags needed from your exact square footage and target R-value, not from a rule-of-thumb chart. The material goes in after air sealing is complete and documented, per Haven Standard protocol.
Dense-Pack Wall Insulation
Dense-pack is blown-in cellulose or fiberglass installed into closed wall cavities at 3.5 pounds per cubic foot, dense enough to resist settling and slow air movement through the cavity. Los Angeles homeowners in Mid-Wilshire and Larchmont call us for this when they’re remodeling a kitchen or bath and have the drywall open, or when we’re drilling and filling from the exterior during siding replacement. The technique requires a specialized hose and pressure gauge, and our crews have done it in stucco, wood siding, and T1-11 applications across the basin. We mark every filled cavity on a job diagram, and that diagram goes in your Documented Photo Record.
Blown-In Top-Up
A blown-in top-up adds material over existing insulation that has compressed, shifted, or settled below current code depth. In Studio City and Toluca Lake, we find original fiberglass batts installed at R-19 in 1980s tract homes, now compressed to R-13 or less from years of storage traffic and ductwork service. We inspect what’s there first, remove any contaminated material, seal what we can reach, then blow new insulation to bring the total assembly to code or above. The top-up costs less than full removal and replacement, but only when the existing material is clean and the air leaks beneath it are accessible.
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.
Brands We Service for Blown-In Insulation
We’ve worked with Owens Corning blown fiberglass systems since 2016, and we stock their AttiCat and ProCat blowing equipment on every truck. The pink fiberglass performs predictably in LA’s dry climate, and we know the coverage charts well enough to quote bag counts accurately from a phone description of your attic dimensions. GreenFiber cellulose is our go-to for dense-pack wall work and for homeowners who prefer a recycled-content material; we’ve blown thousands of bags in Los Feliz and Atwater Village historic homes where fire retardancy and pest resistance matter. Knauf EcoFill and Johns Manville Climate Pro round out our inventory for specific R-value targets and blower compatibility.
Whether your existing insulation is Owens Corning, Johns Manville, Knauf, or any other manufacturer, we can assess it, match or exceed its performance, and document the change. We don’t push proprietary products, and we don’t claim exclusive relationships with any brand. The right material is the one that fits your building, your budget, and your written scope.
Before
AfterSigns You Need Blown-In Insulation Right Now
- Hot second floor in summer, cold in winter. This is the most common call we get from Los Angeles homeowners, especially in neighborhoods like Los Feliz and Silver Lake where 1920s framing meets modern HVAC loads. The temperature split usually means your attic insulation has settled below the ceiling plane, or your ductwork is losing conditioned air into an under-insulated attic.
- Energy bills rising faster than SCE rate increases. If your usage patterns haven’t changed but your bill has climbed 20% or more in two years, the building envelope is the likely leak. We see this in Culver City condos and Santa Monica duplexes where original insulation was thin to begin with and has now degraded.
- Drafty rooms even with windows closed. Air moving through wall cavities and around electrical boxes creates localized cold spots that feel like open windows. In Venice and Playa del Rey, the marine layer wind finds every gap in older stucco and wood siding assemblies.
- Ice dams or condensation stains on the ceiling. Rare in LA but not unheard of during cold snaps, this signals warm, moist air reaching a cold roof deck. The fix is air sealing first, then insulating to keep conditioned air where it belongs.
- Storage items resting directly on attic insulation. Every box and board compresses fiberglass or cellulose, reducing its R-value by half or more in the footprint. If your attic is usable for storage, the insulation beneath the plywood needs to be supplemented or relocated.
Our Blown-In Insulation Process - Step by Step
- 1
Schedule and arrival. You call (628) 226-1097 and a live person answers, 24/7. We book a two-hour arrival window, and you get a text when your named technician is en route. Under Haven Standard: Arrive on schedule, or we call ahead with a real ETA.
- 2
Attic inspection and blower-door test. We enter the attic, photograph existing conditions, and on applicable jobs run a blower-door test, a pressurization reading that shows, in one number, how much air your building envelope is losing. Typical pre-work readings in Los Angeles homes run 3,500 to 6,000 CFM50. We mark every can light, top plate gap, and penetration on a job diagram.
- 3
Air sealing before insulation. We seal what we found. Top plates get foam or caulk, can lights get rated covers or gaskets, plumbing and electrical penetrations get sealed. This is not optional, not an upsell. We do not blow insulation over an unsealed attic floor. Period.
- 4
Insulation installation to written scope. We blow cellulose or fiberglass to the depth and density specified in your written price, calculated from your exact square footage and target R-value. The crew leader checks depth with a probe every 100 square feet and photographs the finished surface.
- 5
Documentation and close-out. You receive a Documented Photo Record of before, during, and after conditions. On jobs where a blower-door test was run, we provide the after reading so you can verify the air-sealing result. Your written warranty and 365-Day Done Right Promise documents are delivered before we leave.
How Much Does Blown-In Insulation Cost in Los Angeles?
A typical blown-in attic insulation job in Los Angeles runs $2,400 to $5,800 for a 1,200 to 2,500 square foot home, depending on four factors: the material you choose, the target R-value, whether existing insulation needs removal, and the extent of air sealing required. Blown-in cellulose typically costs $1.80 to $2.80 per square foot installed; blown-in fiberglass runs $2.20 to $3.50 per square foot. Dense-pack wall insulation is priced by the cavity, with most whole-house retrofits in Los Angeles falling between $4,500 and $9,000. A simple blown-in top-up over clean existing insulation starts around $1,800.
What moves the price: attic accessibility (steep roofs and tight scuttle holes add labor), existing contamination (rodent droppings or water damage require removal and sanitization), and the condition of your air barrier (homes with unsealed recessed can lights throughout need more prep work). What doesn’t move the price: we don’t charge extra for the blower-door test, the Documented Photo Record, or the written warranty. They’re included on every job.
How to avoid overpaying: get a written scope that specifies material brand, target R-value, and air-sealing details. Vague quotes that say “blow in insulation to code” leave room for shortcuts. Bring us any competing written estimate for a Free Second Opinion, we’ll read it with you line by line. Call (628) 226-1097 for your written price before any work starts.
Blown-In Insulation Near Los Angeles - Our Service Area
We run blown-in insulation crews daily across Los Angeles proper and the surrounding basin, with typical drive times of 20 to 45 minutes to Culver City, Santa Monica, Beverly Hills, West Hollywood, Inglewood, Hawthorne, Manhattan Beach, Lawndale, Florence-Graham, Gardena, and Redondo Beach. Same-day estimates are usually available within the 405 corridor, and we schedule work to minimize crew transit time so your job isn’t paying for someone else’s freeway miles. If you’re unsure whether we cover your neighborhood, call (628) 226-1097 and we’ll confirm response time before booking. We also publish dedicated pages for Blown-In Insulation in Culver City and Blown-In Insulation in Santa Monica with neighborhood-specific guidance.
Serving Los Angeles, CA - Our Local Coverage Area
We’re based in the Los Angeles area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Blown-In Insulation in Los Angeles
Blown-in insulation is loose fiber, cellulose or fiberglass, installed with a blowing machine through a hose to fill attic floors, wall cavities, or irregular spaces. Unlike batts that come in pre-cut rectangles, blown-in material conforms to joist bays, pipes, and wiring without gaps, and it can be added over existing insulation in many cases. In Los Angeles, it’s the standard retrofit method because most attics have limited access and existing finishes that make batt replacement impractical.
Most attic jobs in Los Angeles are completed in one day, typically four to six hours for air sealing plus blowing. Dense-pack wall work takes longer, one to two days depending on cavity count and exterior access. We give you a firm time estimate in your written scope, not a range that doubles on the day of. Call (628) 226-1097 to schedule a same-day estimate.
Attic jobs typically run $2,400 to $5,800, wall dense-pack $4,500 to $9,000, and simple top-ups start around $1,800. The exact price depends on your square footage, target R-value, material choice, and air-sealing needs. We provide a written price before any work starts, with no hidden charges for documentation or warranty. Call (628) 226-1097 for your specific quote.
Yes. We stock and install Owens Corning AttiCat and ProCat fiberglass systems and Johns Manville Climate Pro, and we’ve worked with both brands since 2016. We don’t claim exclusive or preferred status with any manufacturer, we use the material that matches your project’s specifications. Bring us any brand, we’ll assess and advise.
We answer calls 24/7 and can usually schedule an estimate within 24 hours for urgent situations, insulation compromised by roof leaks or rodent infestation that has created health hazards. Same-day emergency removal and temporary sealing is available in Los Angeles, Blown-In Insulation in South Gate, and other immediate surrounding cities. Call (628) 226-1097 to describe your situation and we’ll prioritize accordingly.
Every job carries our 365-Day Done Right Promise, if it’s not done right, we make it right, backed by a written scope and written warranty delivered before anyone starts. The Haven Standard requires it. Material warranties from Owens Corning, Johns Manville, Knauf, or GreenFiber run independently and vary by product; we register them on your behalf and include the documentation in your close-out packet.
Clear attic storage items from the work area, provide access to electrical panels if we’re sealing around them, and secure pets away from the work zone. We bring drop cloths, hose protection for your floors, and a HEPA-filtered vacuum for cleanup. You don’t need to be home for the full installation if you’ve signed the written scope in advance, but we do a walk-through with you at completion to review the Documented Photo Record and blower-door results. Call (628) 226-1097 to book your pre-installation estimate.
Schedule Your Blown-In Insulation Service in Los Angeles Today
Call (628) 226-1097 now and a live person will answer, 24/7. We’ll schedule your free estimate, provide a written price before any work starts, and deliver a Documented Photo Record and blower-door verification when the job is done. The 365-Day Done Right Promise applies to every project. No obligation, no voicemail loops, no callback windows measured in business days.
Written by Wes Okafor, Owner at Topside Attic Insulation Los Angeles, serving Los Angeles since 2016.