Insulation Contractor in South Pasadena, CA - Cooler Upstairs in Older Homes
QuietCore Pasadena Spray Foam Insulation is an insulation contractor based in Pasadena that insulates and air seals attics, walls and crawl spaces in South Pasadena homes, finding the leaks and old material first so the new insulation works.

- Service area
- South Pasadena, CA
- Call
- (626) 345-7649
Older homes across South Pasadena's flats and hills
South Pasadena is a small city of flat streets and hillside lots on the west side of the San Gabriel Valley. Most of our calls here come from older houses that have been lived in, added onto and patched for decades, the same kind we work on in San Marino and Sierra Madre.
In a house that age, the attic usually tells the story. We find original insulation packed down thin, old wiring, can lights cut in over the years and sometimes a stain from a roof leak that was fixed long ago, and I'd rather find those before anything new goes in. That's also what moves the price and the schedule here, because the more that has to come out or get sealed first, the bigger the job, and your written estimate lays out that order for your house.
Our services in South Pasadena, CA
The room over the garage and the upstairs bedrooms run hot in a lot of homes here because the attic insulation has packed down thin over the years. I check how many inches are already up there, and our crew brings it to an even depth with the edges as deep as the middle and the eave vents kept clear.
Drafty rooms in older South Pasadena houses usually trace back to gaps around can lights, pipes and the attic hatch, and insulation laid over those gaps just fights the draft. Our air sealing services close the gaps before any insulation goes in, and that's the first step on most of our attic jobs here.
In houses this old, attic insulation has sometimes been soaked by a past roof leak or fouled by rodents, and new material laid on top just buries the problem. We bag and remove the old material and clean up before fresh insulation goes in.
Plenty of houses here sit on raised floors over a crawl space, and cold floors usually mean there's little or nothing between the joists. We check the crawl space for moisture and old damage first, then insulate under the floor, and on hillside lots we plan for a crawl space that's roomy at one end and tight at the other.
Many older walls here were built with nothing in them, which is a big part of why some rooms never feel comfortable no matter what the thermostat says. We work out the best way into the wall cavities before anyone drills, then fill them top to bottom.
Foam costs more than loose fill and seals air while it insulates, so it earns its price mainly in attics where the ductwork runs, which is common in houses that got central air added later. Otherwise I'll usually tell you that sealing the gaps and topping up with blown-in, loose fill blown through a hose, does the job for less.
Every service we offer
Spray foam insulation
Attic insulation
Blown-in insulation
Home insulation
Insulation removal
Crawl space insulation
Wall insulation
Air sealing services
Basement insulation
Closed-cell foam insulation
Open-cell foam insulation
Commercial insulation
Crawl space vapor barrier
Vapor barrier installation
Attic air sealing
Retrofit insulation
How it works when you call us in South Pasadena
Call us or send a request
Call (626) 345-7649 or use the form and tell us what's going on, whether that's a hot upstairs, drafts or old insulation you're not sure about. We get back to you and set a time that works for you.
Walk the attic with me
I come out myself and look at the attic, walls or crawl space with you, checking for wet spots, droppings, old wiring and open gaps before we talk insulation. You get a written estimate that shows what gets done first and why, so the price comes with the reasons behind it.
Our crew does the work
When you're ready, our own trained crew does the job in the order the estimate lays out, with removal and sealing before any new insulation. We keep the work to the attic, crawl space or walls we agreed on and clean up as we go.
Look over the finished job
When the crew is done, I go over the finished work with you before we call it done. You see what went in and where, and you can ask anything while we're still there.
South Pasadena insulation questions
Do I need a permit to insulate my attic in South Pasadena?
The city's list of projects that need a permit doesn't mention insulation, so check with the city before you assume either way. The list names work like plumbing, heating, air conditioning, decks and additions, and the Building Division is the office that issues permits and can confirm what your project needs. If yours needs one, we pull it and take care of the inspection that goes with it.
How do I find out if my South Pasadena house is on the historic inventory?
Ask the city's Planning and Building department, which can tell you whether your house is listed. About 2,500 properties are on the inventory, including most homes 50 years or older, but listing only affects changes to the outside of the house, and attic and crawl space work happens inside. If a job would change the exterior, like getting into walls through the siding, we check with the city first, because most exterior changes here need design approval.
Does an insulation contractor need a South Pasadena business license?
Yes, anyone doing business inside South Pasadena city limits needs a city business license. That includes contractors based in other cities, so it's a fair thing to ask anyone you're thinking of hiring.
When does an insulation contractor need a California contractor's license?
A contractor needs a license from the state's Contractors State License Board when the project needs a building permit, uses any additional workers, or has one or more contracts totaling $1,000 or more in labor and materials. Ask to see it before you sign anything. We're licensed and fully insured, and our own trained crew does the work.
How much does attic insulation cost in South Pasadena?
It turns on what's already in your attic and what has to happen before new insulation goes in, so I give you a number after I've been up there. The biggest swings come from old insulation that has to come out, how many gaps need sealing, how easy the attic is to get into, and whether you go with loose fill or foam. Your estimate shows each of those in the order we'd do them.
How long does attic insulation take in South Pasadena, and do we have to leave the house?
With blown-in insulation you can usually stay home, since the crew works up in the attic and you just keep the hatch area clear. Spray foam is different, because everyone, kids and pets included, stays out until the re-entry time, the point when it's safe to come back inside, has passed. How long the crew is up there depends on the size of the attic and how much has to come out first, and I'll go over both with you before we schedule.
Get a free written insulation plan for your South Pasadena home
We reply to every call and request within one business day to set up a visit. I come out to your South Pasadena house myself, look at the attic, walls or crawl space with you, and give you a written estimate that shows what gets done first and why. It's free, done on site, and there's no obligation.
- Call
- (626) 345-7649
- Location
- Pasadena, CA 91101
- Hours
- Mon–Fri: 8 AM–11 PM, Sat–Sun: 7 AM–11 PM
Call about your South Pasadena attic today
Call (626) 345-7649 or send the form and tell us where your attic hatch is, so I can plan to see the whole space on the first visit.




