Insulation Contractor in Pasadena - Cooler Upstairs Rooms in Older Homes
Monterey Park Spray Foam Insulation insulates and air seals Pasadena attics, walls and crawl spaces, from older houses with thin, settled fill to newer homes where the room over the garage runs hot.

Pasadena: older houses, attics worth a look
A lot of Pasadena is older housing, and the city has set aside whole neighborhoods as historic, so many of our calls here are for houses built long before anyone thought much about attic insulation. We work in older homes on the west side toward the Arroyo Seco, out in east Pasadena around Hastings Ranch, and in rentals that landlords and property managers need kept comfortable around their tenants. It's a lot like the housing we see in Alhambra, with more of the older houses on each street.
In those older houses we usually find a few inches of tired fill in the attic, gaps around old wiring and the hatch, and plaster walls with nothing in them. That's why I go up and look before I quote, because what's already there decides whether we seal and top it up or pull it out and start over.
- Fully licensed and insured.
- Free in-person estimates.
- Expect a reply within 1 business day.
Insulation services for Pasadena homes
Attic insulation
Hot upstairs rooms and a high summer power bill usually trace back to a thin, settled attic layer that's deepest in the middle and thinnest at the edges, which is backward. We bring it up evenly with blown-in insulation, loose fill blown through a hose, and keep the eave vents clear so the attic still breathes.
Air sealing services
Older Pasadena houses leak hot attic air into the rooms below through gaps around can lights, pipes and the hatch. Our air sealing services close those gaps before any insulation goes in, because insulation laid over an open gap just fights the draft.
Insulation removal
When old attic fill has been soaked by a roof leak or is full of droppings, new material on top only buries the problem. We pull it out and clean up first, so the new insulation starts on a clean attic.
Wall insulation
Plenty of older houses here have plaster walls with nothing inside, which is why some rooms stay drafty whatever the thermostat says. We can usually fill those walls through small holes that get patched afterward, and I'll tell you on site whether it's worth doing in your house.
Crawl space insulation
Houses on raised foundations often have cold floors in winter because there's nothing under the subfloor. We insulate between the floor joists from the crawl space and check for moisture down there first, since insulation won't fix a damp crawl space.
Spray foam insulation
When your ductwork runs through a hot attic, foam under the roof can be worth the extra cost because it seals air and insulates in one step. If the ducts aren't up there, sealing the gaps and topping up loose fill usually does the job for less, and I'll tell you which one fits.
Working in Pasadena: permits, licenses and price
Building permits for most construction in Pasadena come from the city's Permit Center, so if your insulation job needs one, the start date waits on it. We pull the permit and set up the inspection, and we check with the city for your address first, because every office handles things a little differently. Before you hire anyone, check two things: a state contractor's license, which the city's permit staff look up too, and a current Pasadena business license, which every business working inside city limits needs and a contractor has to show when pulling a permit. We're fully licensed and insured.
We're based in Monterey Park, a short drive south, and Pasadena jobs are part of our regular week, the same as jobs in San Gabriel. Price comes down to how many inches are already up there, whether old fill has to come out, and how much sealing the house needs. A tight attic in an older house or a low crawl space also slows the crew down, and I'll give you your own figure once I've seen it.
Get a free on-site insulation estimate for your Pasadena home
We reply within one business day of your call or message, then I come out to your Pasadena house myself to look at the attic and put the estimate together. It's free, with no pressure and no obligation. If you go ahead, our installers do the work and I go over it with you before we wrap up.
- Fully licensed and insured.
- Free in-person estimates.
- Expect a reply within 1 business day.
Insulation for Pasadena attics and walls
Insulation questions from Pasadena homeowners
Do I need a permit to insulate my house in Pasadena?
It can need one, so we confirm it with the city for your address before we start instead of guessing. If you'd rather do the work yourself, you can apply for a permit as the owner, though the city strongly recommends a licensed contractor, and if you hire unlicensed workers you have to cover their workers' comp. It's worth getting right, because when you sell, the city inspects the property and owners with illegal construction may be forced to tear it out.
Does an insulation contractor in Pasadena need a California license?
Yes. A contractor needs a state contractor's license when the job needs a building permit, uses employees, or labor and materials together come to $1,000 or more. The city's permit staff check that license with the state board, and contractors have to carry workers' comp, so ask for both before you sign anything.
How much does it cost to insulate an attic in Pasadena?
The price comes from what's in your attic now, so I give you a figure after I've been up there, not over the phone. Pulling out old material, a lot of sealing around older wiring and fixtures, or choosing spray foam over loose fill all raise it, while a clean attic that just needs a top-up usually costs the least.
What causes upstairs rooms to get so hot in older Pasadena houses?
Usually it's a thin, settled layer of attic insulation sitting over open gaps that let hot attic air down into the rooms. Air moves right past the insulation around can lights, pipes and the hatch, and coverage is often thinnest at the edges. We seal the gaps, keep the eave vents clear and bring the insulation up evenly across the whole attic.
How long does attic insulation take, and do we have to leave the house?
Your attic's size and whether old material comes out first set the time, so I'll tell you what to plan around when I come out. For blown-in work and air sealing you can usually stay home. With spray foam, everyone, kids and pets included, stays out until the re-entry time is up, which is the wait before it's safe back inside, and we tell you that time before we start.
What is the best way to insulate an older house in Pasadena?
Start at the top: seal the attic gaps, clear out any old fill that's wet or dirty, then bring the attic up before you think about walls or floors. Empty plaster walls and cold floors over a crawl space come next, and I'll tell you which of those is worth the money in your house and which isn't.




