Insulation Contractor in Sierra Madre - Older Homes Sealed, Then Insulated
QuietCore Pasadena Spray Foam Insulation is an insulation contractor working in Sierra Madre homes, from attics and walls to crawl spaces. We clear out old, dirty insulation, seal the gaps, then insulate, in that order.

- Service area
- Sierra Madre, CA
- Call
- (626) 345-7649
Older foothill homes across Sierra Madre
Sierra Madre is a small foothill city between Pasadena and Arcadia, and most of what we see here are older houses on quiet streets, with some climbing the slope toward the canyon. We've been an insulation contractor based in Pasadena, CA since 2013, and we do the same work next door in Arcadia and down in San Marino.
Older houses here tend to have attics with a few inches of tired insulation, piled up in some spots and bare in others, with gaps around the hatch, the pipes and old light fixtures. Many sit on raised floors over crawl spaces, which is why people tell us about cold floors, and a few hillside lots have a lower level dug into the slope. That's why I look before I quote, because what's under the old insulation, like a past roof leak or old wiring, decides what we do first and how long the job runs.
Our services in Sierra Madre, CA
Most hot-upstairs calls here trace back to an attic that's deep in the middle and thin along the edges, which is backward. We bring it up to an even depth all the way out to the eaves and keep the eave vents clear so the attic can still breathe.
In older Sierra Madre attics we often find insulation that soaked up an old roof leak or that rodents have been living in. We bag it out and vacuum the attic clean before anything new goes in, because covering it only hides the problem.
Older houses leak air around the attic hatch, pipes, wires and recessed lights, and that's a big part of why rooms feel drafty. We do the air sealing first, closing those gaps with foam and caulk, so the new insulation isn't fighting a draft.
Houses on raised floors here often have nothing between the floorboards and the open crawl space, so the floors stay cold. We check down there for moisture first, since insulation over a damp crawl space won't last, then insulate under the floor.
Some homes built into the hillside have a lower level that stays cool and damp where it sits against the slope. Our basement insulation work starts by checking those walls for moisture, then insulating them so the room is comfortable to use.
A lot of older walls here were built with nothing inside them, so the rooms lose heat through every outside wall. We blow insulation in through small holes and patch them, which saves tearing out plaster or drywall.
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
What happens when you call us in Sierra Madre
Call or send a request
Call (626) 345-7649 or fill out the form with a line about what's going on, like a hot upstairs or cold floors. We get back to you and set a time for me to come out.
Walk the attic with me
I come out myself and look at the attic, walls or crawl space with you, checking how many inches are up there, what shape it's in and where air gets in. You get a written estimate that lays out what gets done first and why, so you can see where your money goes.
Our crew does the work
Our own trained crew works in the order the estimate lays out, with removal and repairs first, then sealing, then insulation. We cover the path through your house to the attic hatch so nothing gets tracked onto your floors.
Go over the finished job
Before we call it done, I go over the work with you and show you the sealed gaps and the even depth out to the eaves. We leave the attic and your house clean.
Sierra Madre insulation questions
Do I need a permit to insulate my attic or walls in Sierra Madre?
It can need one, and the city's Building and Safety Division is the office that decides. The city requires a building permit for any project that alters a structure in whole or in part, and its list includes replacing wall or ceiling coverings, so wall work that ends in new drywall falls on that list. The city also has no all-in-one permit, so if we find old wiring in the attic that needs an electrician, that's its own permit. These permits go only to a state-licensed contractor or the property owner, and we check with the city and take care of the permit and the inspection if your job needs one.
Does an insulation contractor from Pasadena need a Sierra Madre business license?
Yes. Sierra Madre requires a City Business License from businesses based outside the city that work inside it. A contractor also has to hold that license before applying for any construction permit in the city, so it's a fair thing to ask whoever you hire.
When does an insulation contractor need a California contractor's license?
A contractor needs a state license whenever the job needs a building permit, uses hired workers, or costs $1,000 or more in labor and materials together. The small-job exemption covers only work under $1,000 with no permit, no employees and no advertising as a licensed contractor, so a job done by a crew doesn't fit it. We're licensed and fully insured.
How much does it cost to insulate an older house in Sierra Madre?
The price comes down to how much old insulation has to come out, how many gaps need sealing, how hard the attic or crawl space is to get into, and which material goes in. Foam costs more and seals air while it insulates, but for most attics, sealing the gaps and topping up with blown-in insulation, loose fill blown through a hose, gives you more for the money unless your ductwork runs up there. I'll give you a written number once I've seen the attic.
How do I know if the old insulation in my attic needs to come out?
It needs to come out if it got soaked by a roof leak or is full of rodent droppings, because new insulation laid on top keeps that problem in your house. Insulation that's only old and flattened can usually stay and get topped up after the gaps are sealed. When I'm up there, I check how many inches you have and what shape it's in, and I tell you plainly what I find.
How long until we can go back in the house after insulation is installed?
With blown-in loose fill, you can usually stay home while we work and use the house that same day. Spray foam is different, because it has to cure and the foam maker sets the re-entry time, which is how long people and pets stay out before coming back in. We tell you that wait before the job is booked, so you can plan for the kids and pets.
Free insulation estimate for your Sierra Madre home
Send the form or call, and we'll reply within one business day to set a time for me to come out to your Sierra Madre home. I look at the attic, walls or crawl space with you and leave a written plan that shows what gets done first and why. There's no obligation to go ahead.
- Call
- (626) 345-7649
- Location
- Pasadena, CA 91101
- Hours
- Mon–Fri: 8 AM–11 PM, Sat–Sun: 7 AM–11 PM
Get your Sierra Madre attic looked at
We pick up the phone until 11 at night every day of the week, so call (626) 345-7649 after work or send the form whenever it suits you.




