Insulation Before & After in Los Angeles, CA
Talk is cheap in this trade. What actually matters is what changed inside the walls and attic once we left the driveway. The projects below show real insulation problems we run into across Los Angeles County, from Echo Park bungalows to Sherman Oaks ranch homes, and exactly what we did about them. No dramatic lighting. No stock photography. Just what the work looks like when the old material comes out and the right system goes in.
Recent Transformations
Attic Insulation Replacement in a Silver Lake Bungalow
The homeowner kept the thermostat at 72 and still had a bedroom that felt like a sauna by 3 p.m. We found maybe four inches of compacted fiberglass from the Reagan administration, mixed with dust and what looked like a family of mice had set up a condo. We removed everything, air-sealed the top plates and can lights, then blew in fresh insulation to R-38 across the full attic floor. The bedroom temperature evened out within a week, and the AC stopped cycling every twelve minutes.
Spray Foam Insulation on a Mid-City Add-On With Zero Insulation
A Mid-City homeowner added a den in the 1990s and the contractor skipped insulation entirely. The room was unusable in August and freezing by January. We sprayed the ceiling cavity and exterior wall with closed-cell foam, which sealed the gaps the old drywall had hidden for decades. The room now holds a steady temperature and the street noise from Pico dropped noticeably. It was a single-visit job, and the 90-Day Done Right Promise backs the work if anything shifts.
Crawl Space Encapsulation in a Hancock Park 1920s Home
This Hancock Park house had a dirt crawl space that pumped moisture into the hardwood floors year-round. You could smell the earth from the hallway. We laid down a heavy vapor barrier, sealed the foundation vents, and insulated the rim joists. The musty odor disappeared the same week, and the floors stopped cupping in the winter. Homes this old in Los Angeles almost always need this done, but few owners realize it until the damage starts showing.
Insulation Removal After a Raccoon Incident in Echo Park
A family in Echo Park heard scratching above the kids’ bedroom at night. Turns out a raccoon had torn through a gable vent and turned the attic into a latrine. We removed all the soiled insulation, sanitized the attic floor, repaired the vent with hardware cloth, and blew in fresh GreenFiber insulation. We also sealed the roofline gaps the previous insulation had been hiding. The scratching stopped, the smell went with the old material, and the house finally held heat in December.
Radiant Barrier Installation in a Woodland Hills Ranch
Woodland Hills gets the full force of the Valley sun, and this ranch home’s attic hit 140 degrees in July. The air conditioner ran all afternoon and never caught up. We installed a radiant barrier under the roof deck, which reflects the heat before it ever reaches the insulation below. Attic temperatures dropped by over 30 degrees, and the family’s energy bill that August was the lowest they’d seen in five years of living there.
Wall Insulation Retrofit in a Koreatown Stucco Duplex
Koreatown has thousands of older stucco duplexes with empty wall cavities. This one had single-pane windows and zero insulation in the walls, so the tenants on the western side baked every afternoon. We drilled small access ports from the exterior, blew in Rockwool to fill every stud bay, and patched the holes to match the stucco. The difference was immediate. The owner told us the tenants stopped running portable AC units in every room by the following week.
Want Results Like These?
Every house above started with the same question: why is this room so uncomfortable? If you’re asking that in Los Angeles, call (213) 782-8141. A live person answers 24/7, pricing is upfront, and most jobs finish in a single visit. We’ll start with an honest look at what’s actually inside your attic and walls. The 90-Day Done Right Promise applies to every job, and the $89 Seasonal Tune-Up is a smart first step if you’re not sure where to begin.
Written by Neil Ashford, Owner at Warmline Insulation Co., serving Los Angeles since 2011.