Insulation Company in Hollywood, CA
Blown in insulation is the workhorse retrofit for Hollywood’s 1920s and 1930s homes, and it’s usually the first thing we recommend when a bungalow has original walls or a low-slope roof with no thermal barrier to speak of. We’re Sage Insulation, and we’ve served Hollywood since 2018, focusing on dense-packed cellulose and fiberglass for walls, attics, and the odd floor cavity. Most jobs here come down to two things: cutting radiant heat from a flat roof, and quieting street noise that seeps through old stucco and wood framing. Call us at (855) 360-9333 when you want someone to look at the cavity before they fill it.
Why Hollywood Homes Are Different
Hollywood’s housing stock runs heavily to wood-frame bungalows and low-rise stucco courtyard apartments built between 1920 and 1940. Almost none of them had insulation when they went up. The walls were framed for knob-and-tube wiring and left empty, and the roofs, many flat or barely pitched, were designed for a climate where nobody thought much about air conditioning. So the thermal problem in Hollywood isn’t a cold attic in January. It’s radiant heat loading through a west-facing wall or an uninsulated roof deck from June through October, made worse when a Santa Ana wind spike pushes temperatures past what the original builders ever imagined.
Acoustics are the other half of the Hollywood equation. Homes near Sunset Boulevard or Hollywood Boulevard sit close to nightlife, tour buses, and 24-hour foot traffic. Courtyard apartments add a layer of shared walls and party framing, so one tenant’s footsteps or television become another tenant’s noise problem. Blown-in insulation is the standard fix here because it fills wall and ceiling cavities fully without opening finished surfaces, and it adds mass that deadens sound while it slows heat transfer. Any work on a period bungalow also means watching for historic-preservation rules before adding exterior penetrations, and courtyard buildings often need building-wide planning because a flat roof and shared partition walls don’t stop at one unit’s property line.
Our Main Hollywood Services
Two services carry most of the phone calls from Hollywood homeowners. One is attic work, because that’s where the sun does its worst damage. The other is spray foam, because older walls and flat roof decks often need air sealing as much as they need insulation.
Attic Insulation in Hollywood
Most Hollywood attics are shallow, hot, and barely accessible, and many low-slope roof decks leave only a few inches of cavity between ceiling and roofing. We work around that by choosing materials that perform in confined spaces and by focusing on radiant barriers and dense-packed coverage rather than just piling on more inches. An uninsulated attic over a 1920s bungalow can push ceiling temperatures past 100 degrees by mid-afternoon, which means the HVAC system never really gets a break. Removing old, settled material and blowing fresh cellulose or fiberglass over it is the single highest-impact job we do in Hollywood. Full details are on Attic Insulation in Hollywood.
Spray Foam Insulation in Hollywood
Spray foam earns its keep in Hollywood when a building has irregular framing, an open beam ceiling, or a flat roof deck that needs both insulation and an air seal in one pass. Open-cell foam does double duty in partition walls and underside-of-roof applications by cutting sound transmission, which matters when a bedroom shares a wall with a neighbor’s stairwell. Closed-cell foam is the pick for tight cavities and any area where moisture or structural racking is a concern. We install both Icynene and Demilec systems, so the recommendation follows the cavity, not the brand. Read the specifics at Spray Foam Insulation in Hollywood.
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 Hollywood
Blown in insulation is the most practical retrofit for Hollywood’s 1920s and 1930s homes because it reaches wall and ceiling cavities that were never insulated and fills them completely without tearing out plaster or drywall. Blown In Insulation is our most-requested Hollywood service for exactly that reason. A bungalow with uninsulated walls and a low-slope roof heats up fast in summer and leaks every bit of conditioned air the HVAC system produces, and blown-in material attacks both problems in a single visit.
Cellulose Insulation
Signs you need it
Rooms that heat up fast on sunny afternoons, especially on the west side of the house, and walls that feel warm to the touch by evening.
What it costs in Hollywood
Cellulose wall and attic retrofits in Hollywood typically run $1.50 to $3.50 per square foot of installed coverage, with most 1,200-square-foot homes landing between $2,200 and $4,200.
How we do it
We dense-pack the material into wall cavities through small access holes, and blow loose-fill across attic floors to a consistent depth, which fills the odd gaps and settled areas that batts always miss.
Loose Fill Insulation
Signs you need it
An attic that has old, settled fiberglass or no insulation at all, with ceiling fixtures that radiate heat into the rooms below after about 2 p.m.
What it costs in Hollywood
Loose fill attic insulation in Hollywood generally costs $1.00 to $3.00 per square foot of coverage, depending on depth and the material chosen for the cavity.
How we do it
We blow the loose fill over the existing attic floor to a consistent, measured depth, working around vents, recessed lights, and wiring so nothing gets buried that shouldn’t be.
What Blown In Insulation Costs in Hollywood
| Item | Typical range in Hollywood |
|---|---|
| Blown-in wall retrofit (dense-pack) | $1.50 – $3.50 per sq ft |
| Blown-in attic coverage (loose fill) | $1.00 – $3.00 per sq ft |
| Attic air sealing + blown-in upgrade | $1,800 – $3,500 project average |
Can you blow insulation into walls that already have knob-and-tube wiring?
No, and this is common in Hollywood. Knob-and-tube wiring must be decommissioned or replaced before any insulation touches the cavity, because insulating over live knob-and-tube is a fire hazard. We check for it on every wall job.
How long does a blown-in job take in a Hollywood bungalow?
Most 90028 bungalows are done in a single day, including wall access holes and attic coverage. Dense-packing walls takes a bit longer when we hit unexpected framing or old electrical, which is exactly what 90-year-old houses are known for.
Brands We Service in Hollywood
We stock and install Owens Corning, Johns Manville, and Knauf blown-in products, and we keep Rockwool on hand for Hollywood jobs that need mineral wool’s fire rating and sound control. Most materials are available from local supply within one day. See the full lineup on our brands page.
Pricing for Insulation Company in Hollywood, CA
| Service | Typical range in Hollywood |
|---|---|
| Blown-in attic insulation | $1.50 – $3.00 per sq ft |
| Blown-in wall insulation (dense-pack) | $1.50 – $3.50 per sq ft |
| Attic air sealing + insulation upgrade | $1,800 – $3,500 |
| Spray foam (open-cell) | $1.50 – $3.00 per sq ft |
| Spray foam (closed-cell) | $2.00 – $4.00 per sq ft |
| Fiberglass batt installation | $1.00 – $2.00 per sq ft |
| Cellulose blown-in retrofit | $1.50 – $3.50 per sq ft |
| Radiant barrier in the attic | $1.60 – $2.80 per sq ft |
Costs in Hollywood edge upward when a job involves a flat roof with tight clearance, a courtyard building with shared access, or historic-facade restrictions on exterior work. We quote fixed prices before work starts, so the number on the estimate is the number on the invoice, even when the attic turns out to be more stubborn than expected.
Neighborhoods We Serve in Hollywood
We cover all of 90028 and the surrounding blocks, and most Hollywood jobs get a technician on site within one to two business days for the estimate and often within the week for the work itself.
- Whitley Heights
- Hollywood Dell
- Beachwood Canyon
- Little Armenia
- Thai Town
Service Area – Cities Near Hollywood
Sage Insulation works across central Los Angeles and the neighborhoods around Hollywood. If you’re in a nearby area, we serve Koreatown, CA, Echo Park, CA, Silver Lake, CA, and Los Angeles, CA with the same three insulation methods and the same eight manufacturer brands.
Serving Hollywood, CA — Our Local Coverage Area
We’re based in the 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 Insulation Company in Hollywood
Estimates in Hollywood are usually scheduled within one to two business days, and most blown-in and attic jobs can be completed within the same week. Smaller wall retrofits and single-room projects sometimes get same-week scheduling when the calendar allows. Call (855) 360-9333 and we’ll give you a real date, not a range.
Most insulation retrofits in Hollywood don’t require a building permit, because the work happens inside existing cavities and doesn’t change the structure. The exception is courtyard apartments or historic-designated properties where HOA rules or preservation review may apply before anyone cuts an access hole. We’ll tell you if your building fits that category after the first look.
Yes, 90028 is our core Hollywood service area, and we work in every part of it, from the flats near Hollywood Boulevard up into the hillside streets. We also cover the immediately adjacent blocks that share a Hollywood mailing address but sit just outside the ZIP boundary. If you’re not sure, call and ask; if we can’t get there, we’ll say so instead of overbooking.
If your Hollywood home or apartment feels hotter than it should every summer, or if street noise keeps working its way in after dark, blown-in insulation is the fastest, least invasive fix. Call Sage Insulation at (855) 360-9333 for a free estimate, and we’ll tell you what your cavities actually need before we fill them.
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 60-minute.
- 4You approve before work beginsNothing starts until you say go.
What Hollywood Customers Say
"Handled the utility rebate paperwork, which knocked a real amount off the final cost."
— Neil Reddy"Spray foam in the rim joists in the basement. The cold floors above them are gone."
— Cole Reed"Found and sealed a gap around the chimney chase that was basically an open chimney to the attic."
— Alejandro Vargas