Blown-In Insulation Cost - Same-Day Service, Done Right the First Time

How Much Does Blown-In Insulation Cost in Long Beach?

Blown-in insulation in Long Beach typically costs $1,650 to $4,200 for an average 1,200 – 1,800 sq ft attic, with most homeowners paying around $2,400. Smaller attics or simple top-offs with fiberglass run closer to $900 – $1,400, while full air-seal-and-insulate jobs with premium materials like Rockwool or GreenFiber cellulose reach $5,500+. You’ll have your exact written price before any work begins: call (562) 471-3972 for a free estimate.

This pricing guide is built for Long Beach specifically, with numbers that reflect our local labor costs, the coastal climate’s impact on material choice, and what we’ve seen in attics from Belmont Shore to Bixby Knolls over the past two decades. Thistledown Insulation Long Beach is part of the Cedarwell family of companies, and every job follows the same promise: a written price first, shoe covers at the door, and a photo of the clean-up before the van leaves.

Key Takeaways

• Average blown-in insulation cost in Long Beach: $1,650 – $4,200, with most jobs landing near $2,400.
• Fiberglass is the budget-friendly option; cellulose (GreenFiber) handles Long Beach humidity well; Rockwool costs more but adds fire resistance and soundproofing.
• Older California homes built before 1978 often need air sealing first, which adds $400 – $1,100 to the project.
• You’ll receive a written price before any work starts, every single time.
• Call (562) 471-3972 and a live person answers, 24 hours a day.

Blown-In Insulation Cost Breakdown (2026)

Here’s exactly what goes into a blown-in insulation quote in Long Beach. These are the numbers our technicians use when they measure your attic, and they’re what you’ll see reflected in your written estimate.

The single biggest cost driver is your attic’s square footage and whether the existing insulation stays or goes. A 900 sq ft attic in a mid-century Lakewood-adjacent bungalow with 4 inches of old fiberglass might get topped off for under $1,000. That same house after a roof leak that left soggy cellulose and a rodent problem would need removal, sanitizing, air sealing, and new insulation, and that’s a $4,000+ job.

Material choice matters more than most people expect. Fiberglass is the workhorse, and it’s perfectly adequate for most Long Beach attics. Cellulose costs more but settles densely into the irregular joist bays found in older California homes. Rockwool is the premium pick for families who want the extra fire resistance, and it does the best job of quieting the sound of Long Beach Airport approach paths over Bixby Knolls or Interstate 405 traffic in neighborhoods north of Cal State Long Beach.

You also pay for access. Attics under steep roofs with a tight hatch in a hallway closet are slower work than a wide-open trussed attic in a newer Alamitos Heights build. Labor in Long Beach runs $60 – $110 per hour, and a two-person crew typically spends 4 – 8 hours on a standard attic. Our technicians are background-checked and uniformed, and we lay drop cloths from the front door to the attic hatch on every job, simply because a family shouldn’t have to vacuum after the insulation crew.

What Affects Blown-In Insulation Pricing in Long Beach

• Attic square footage and joist spacing. Long Beach homes run from 1920s California bungalows with tight joist bays to 1960s ranch-style tract homes with 24-inch on-center framing. Wider spacing means more material per square foot, so a 1,400 sq ft attic in a Lakewood Village ranch can actually need more insulation than a 1,600 sq ft attic in a newer Naples Island build.
• Your existing insulation and its condition. If it’s dry, clean fiberglass from the 1980s, we can blow right over it. If it’s damp from marine-layer moisture intrusion or a past roof leak, or if you’ve had rodents nesting in it, removal is required. Removal is labor-heavy and adds $600 – $1,800 depending on the attic size and condition.
• Air sealing requirements. Homes built before 1978 in Long Beach frequently have unsealed can lights, plumbing chases, and wall top plates that leak conditioned air into the attic. In Wrigley and Central Long Beach, we routinely find attics where sealing alone cuts the homeowner’s cooling load noticeably. Air sealing is $400 – $1,100 and it’s the part of the job that makes the insulation actually perform.
• R-value target. Most Long Beach attics need R-30 to R-38 for a balance of comfort and cost. On the west side, where afternoon sun hammers flat-roofed and low-pitch roofs in areas like Westside and Cambodia Town, going to R-49 can add $300 – $800 but does make a real difference in upstairs temperature.
• Attic access and obstructions. A fold-down ladder in a hallway is straightforward. A 22-inch hatch in a bedroom closet with a water heater inches from the opening is not. We have to work around ducts, recessed light housings, bathroom exhaust fans, and occasionally old knob-and-tube wiring in pre-1930s Long Beach homes.
• Material brand and product type. We install eight brands – Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber – because different attics and families need different solutions. For example, if the family dog spends time in the hallway below the attic hatch while we work, we’ll steer you toward pet-safe product options where a choice exists.

Blown-In Insulation vs. Other Insulation Types

If you’re weighing blown-in against spray foam or batts, here are the numbers for the Long Beach market specifically. Understanding the trade-offs will help you read any quote accurately, whether or not it comes from us.

Fiberglass Blown-In

$0.60 – $1.10 per sq ft installed. The budget choice. It’s lightweight, it doesn’t settle dramatically, and it’s what most 1980s – 2000s Long Beach homes already have. Good performance for the price, but it’s less effective at stopping airflow, which is why air sealing first is so important.

Cellulose Blown-In (GreenFiber)

$0.90 – $1.60 per sq ft installed. Made from recycled paper treated with borate, which resists mold and pests. In Long Beach, where evening marine air can push humidity into attics, the denser coverage of cellulose can outperform fiberglass in irregular spaces. Pet-safe product options exist with GreenFiber, which matters to families concerned about what’s overhead.

Rockwool Blown-In

$1.80 – $2.75 per sq ft installed. Made from volcanic rock. Fire resistance up to 2,000°F, excellent sound control, and it’s hydrophobic, meaning it won’t hold moisture from Long Beach’s coastal humidity. If you hear the Blue Angels over Belmont Shore or the 405 hum at night in Park Estates, Rockwool isolates noise better than anything else we install.

Spray Foam (Where Applicable)

$2.50 – $6.00 per sq ft installed. For Long Beach attics, spray foam is typically only recommended in specific cathedral ceilings, flat-roof retrofit situations where venting is problematic, or garage-to-living-space conversions. For a standard vented attic with standard framing, blown-in is usually the better value.

Read more about how blown-in compares in real attics on our Blown-In Insulation in Long Beach page. And if you want our honest recommendation for your specific attic rather than a generic brochure answer, call (562) 471-3972 and we’ll walk you through it.

What You Get With a Thistledown Insulation Quote

Every estimate we write for a Long Beach home includes three things that are non-negotiable for us. First, a written price before any work starts. Not a range with an asterisk, not a “we’ll see how it goes” number – a line-itemed price you can hold us to. Second, the 365-Day Done Right Promise: if the insulation isn’t right, we make it right, no debate. Third, the Cedarwell Care Promise on every visit: shoe covers and drop cloths inside your home, quiet tools when children are sleeping, and a photo of the clean-up before we leave.

Neil Barron, who leads our team, put it this way: the insulation is what you pay for, but the care is what you’re actually hiring. We don’t ask you to trust that the attic was cleaned. We send the photo.

How to Save on Blown-In Insulation in Long Beach

• Top off instead of full replacement when the existing insulation is intact. If your current fiberglass is dry and uncompressed, we can blow fresh material over it and bring you to R-38 for a fraction of full replacement cost. This is the most common cost-saver we see, especially in homes built in the 1980s and 1990s.
• Bundle air sealing with insulation. Doing both in one visit saves on mobilization costs and attic access setup. You also get the full performance benefit immediately, rather than sealing later and paying for prep twice.
• Check for utility rebates. Southern California Edison and Long Beach Utilities & Gas have offered attic insulation rebates in recent years, and the 2026 federal tax credit for insulation (30% of material cost, up to $1,200) applies to blown-in products. Ask us when you call – we’ll point you to the current programs.
• Get an honest material recommendation. Not every attic needs Rockwool. If fiberglass blown-in over air sealing does the job in your climate zone (Long Beach is IECC Climate Zone 3C), paying for premium material may not move the needle. We’ll tell you that plainly.
• Don’t skip the free estimate. Our estimates are free and we come to your home, measure, and write the number. Call (562) 471-3972 and a live person will schedule it. No voicemail tree, no “we’ll call you back next business day.”

Is Blown-In Insulation Worth It in Long Beach?

In our experience in the Long Beach market, the answer is yes, with the biggest comfort difference showing in homes west of Cherry Avenue, where summer temperatures run higher and the marine breeze doesn’t always penetrate. A house with R-11 attic insulation – common in 1960s tract housing – upgraded to R-38 typically sees upstairs rooms stay 6 – 10°F cooler in August and warmer in the January overnight chill. That’s a difference you feel, not one you debate about on a thermostat.

Long Beach homes also deal with a specific coastal issue: moisture. The marine layer that rolls in over Signal Hill and downtown pushes humid air into vented attics, and under-insulated attics encourage condensation on ceiling drywall. Blown-in cellulose with borate treatment resists that mold cycle, and Rockwool doesn’t hold moisture at all. We choose insulation products for Long Beach specifically because this climate isn’t Riverside – it’s not Ventura – it’s its own microclimate, and the right product matters.

If you’re not sure whether your attic is under-insulated, look at the ceiling joists. If the joists are visible above the insulation, you’re at R-11 or less, and you’re losing conditioned air year-round. If you’re not comfortable going up the ladder, we’ll send a technician to measure at no cost as part of the free estimate, and we’ll show you what we find.

FAQs – Blown-In Insulation Cost

How much does blown-in insulation cost per square foot in Long Beach?

Blown-in insulation in Long Beach runs $0.60 – $2.75 per square foot installed, depending on material: fiberglass at $0.60 – $1.10, cellulose at $0.90 – $1.60, and Rockwool at $1.80 – $2.75. These numbers include labor and a written price before work starts. Call (562) 471-3972 for an exact quote on your attic.

What’s the cost to insulate a 1,500 sq ft attic in Long Beach?

Expect $2,000 – $3,800 for a 1,500 sq ft attic with standard air sealing and fiberglass or cellulose blown-in to R-38. Premium Rockwool material pushes the total to $3,300 – $4,800. For a free, specific number on your home, call (562) 471-3972.

Is it cheaper to repair or replace insulation in Long Beach?

When at least half of your existing attic insulation is dry, clean, and in reasonable condition, topping it off runs $900 – $1,600 – much cheaper than full removal and replacement at $1,650 – $4,200. If you’ve had roof leaks, pests, or visible mold, replacement is the only correct path and we’ll show you exactly what we see in the attic before we quote. Call (562) 471-3972 to schedule a free attic inspection.

How much does old insulation removal cost in Long Beach?

Old insulation removal in Long Beach typically costs $600 – $1,800, depending on attic size, accessibility, and material type. This is a job for trained professionals because old insulation can conceal moisture damage, animal droppings, or even pre-1980s materials that require special handling. We handle removal, disposal, and replacement in one visit, and the process is included in your written price.

Can you install blown-in insulation in one day?

Yes. A standard 1,200 – 1,600 sq ft attic with normal access takes our two-person crew 4 – 8 hours, including air sealing, material installation, and clean-up. Larger attics, removal jobs, or difficult access can stretch into a second morning, but most single-family homes in Long Beach are same-day jobs. Your written price includes the time estimate, and we work quietly during nap hours if the kids are home. Call (562) 471-3972 with your address and we’ll tell you if you’re a one-day job.

Do you offer free estimates for blown-in insulation in Long Beach?

Yes. Every Thistledown Insulation Long Beach estimate is free and includes a written, line-itemed price before any work starts. A live person answers every call at (562) 471-3972, 24 hours a day, 7 days a week. We’ll schedule an attic visit, measure everything, and put the number in your hand. You won’t get a vague range or a pressure close – just a price.

Who We Are: Thistledown Insulation Long Beach

Thistledown is the soft fluff of the thistle – one of nature’s lightest insulators. The name is a promise about how carefully we work. Since 2003, we’ve served Long Beach as an independently owned member of the Cedarwell family, installing attic and spray foam insulation using products from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber.

Every job gets the same treatment: a background-checked, uniformed technician arrives with shoe covers and drop cloths, explains what we’ll do before we do it, and leaves a photo of the clean-up before the van pulls away. That’s the Cedarwell Care Promise, and it’s not an upgrade – it’s the standard. Families in Long Beach hire us because they want to know exactly what product goes near the baby’s room, what the floors will look like after the job, and what they’ll pay before anyone picks up a tool.

Start with our home page for an overview of everything we do, or go straight to Blown-In Insulation in Long Beach for the full service detail.

Get Your Free Blown-In Insulation Estimate in Long Beach

You’ll have a written price before we touch a rafter, and a live person will answer your call any hour of any day. Call (562) 471-3972 now to schedule your free attic inspection and estimate. We’ll bring the shoe covers, the drop cloths, and the numbers. The clean-up photo is yours to keep.

Written by Neil Barron, Owner at Thistledown Insulation Long Beach, serving Long Beach, CA since 2003. Pricing reflects the Long Beach market as of 2026. Thistledown Insulation Long Beach offers free estimates – call (562) 471-3972.