Wall insulation in Glendale CA - comfortable rooms without tearing out your walls
Drafty rooms and outside walls that feel cold to the touch? We fill the hollow walls so your house holds its temperature.
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Can you add insulation to the walls of a house that's already built?
Wall insulation in Glendale, CA, is how we fill the empty spaces inside the outside walls of a house that's already standing. We pack them tight with cellulose or fiberglass so air can't drift through, and the rooms hold their heat in winter and stay cooler in summer.
Maybe the bedroom on the street side is always the cold one, or the outside walls feel chilly under your hand, and you've already taken care of the attic insulation. A lot of older houses were built with nothing in those walls at all. The price mostly comes down to how much wall we're filling, which side we drill from, how much patching the stucco, siding or plaster needs, and what wiring turns up inside. The schedule turns on that wiring check, on whether the city wants a permit for your job, and on whether you'd rather wait and do it with new siding. I'll walk you through all of it on site, and the estimate puts a number on your own walls.
How we handle wall insulation, from the wiring to the patch
Before we drill a single hole, I find out what wiring runs inside your walls. The electrical code doesn't allow insulation on or around old knob and tube wiring, so a wall that has it can't be filled until that's sorted out. If your house was built before 1980, federal guidance says to keep lead-safe rules in mind, depending on how much wall the work disturbs, so I'll go over that with you too. Then I help you decide whether to fill from inside or outside. If you're planning to re-side soon, that's a great time to do it, because the house wrap behind the siding can be checked or replaced while it's exposed. You can also add rigid foam boards on the outside, along with filling the walls or instead of it. Our crew packs each hollow stud space tight with blown-in insulation, loose cellulose or fiberglass blown through a hose, so it fills the whole space and stays put. Then they patch every hole. Your satisfaction, guaranteed.
Filled walls work best when the drafts are stopped too, so we often pair this job with air sealing services, which close the gaps around outlets, pipes and trim. If the cold you're fighting comes up through the floor instead, basement insulation is usually the better place to start.
What's different about wall insulation in Glendale
The city decides what paperwork a job needs, and I check with the city or county building office for your address before we schedule anything. If your wall job needs a permit, we pull it, line up the inspection and put in writing who's handling it. Re-siding is where it gets particular. The city's simpler stucco and siding permit fits only jobs that are just that, with no windows, doors or roofing mixed in. So when insulation rides along with new siding, we work out with the city how the whole job gets filed. If your siding is staying put, the state's energy rules say insulation between the studs can meet the requirement for an altered wood-framed wall, and that's what a drill-and-fill job puts there.
Most of the walls we fill around here belong to older stucco houses with plaster inside, and some still have their original wiring, which is why the wiring check comes first. We're based in Glendale and work from the foothills out across the San Gabriel Valley, and we see the same kinds of houses on jobs in La Crescenta-Montrose and Burbank.
- Call (747) 372-8156
- Mon–Fri: 6 AM–11 PM, Sat–Sun: 7 AM–11 PM
- Glendale, CA 91206
What happens after you call us about your walls
Call us or send the form
Most of the time I pick up the phone myself. We find a time for me to come out and look at the house.
I look before anyone drills
I take a flashlight up in the attic and under the house to see what's in your walls and what wiring runs through them, and I walk you through what I find. Then I write up your estimate, with the side we'd fill from and the price, so you know the cost before a single hole goes in.
Our crew fills the walls
Our crew lead and installers do the drilling, packing and patching. You'll know ahead of time which side of the house they're working from and which rooms they'll be in.
We look it over together
Before we pack up, I come back and check the work with you. If something doesn't look right to you, that's the time to point it out, while we're all still there.
Why Glendale homeowners call WeatherFit for wall insulation
The owner checks your walls
I come out myself to look at the job and write the estimate. I come back at the end to check the crew's work with you, so the person who made you a promise is the one who sees it through.
Learned the trade from my dad
I grew up crawling through attics with my dad, and I started this business in Glendale in 2021. He taught me that insulation is the job nobody sees but the family lives with every day, so I'll tell you straight when a wall isn't worth filling.
Licensed and insured in California
California's Contractors State License Board counts installing insulation for temperature or sound control as licensed work, and we're licensed and insured. Someone without a license is allowed to take only jobs under $1,000 that need no permit and where they employ no one, so ask anyone bidding on your walls for their license.
On a wall job, the thing that matters most is knowing what's inside before anything gets filled. Tell us about your house, and I'll come take a look.
Request an estimateGet a free on-site estimate for your walls
We reply within one business day to set up a visit, and there's no obligation to book. I come out myself, check your walls and wiring, and walk you through what I find before I write up your estimate.
- Licensed and insured.
- Phone
- (747) 372-8156
- Location
- Glendale, CA 91206
- Hours
- Mon–Fri: 6 AM–11 PM, Sat–Sun: 7 AM–11 PM
Questions about wall insulation in Glendale
How much does wall insulation cost near Glendale, CA?
Wall insulation in the Los Angeles area usually costs about $1 to $4 per square foot of wall. That's the going rate in the area, not our quote. Where your job lands depends on how much wall we're filling, which side we drill from and how much patching is needed, and the free on-site estimate gives you the number for your house.
How do I add insulation to walls without tearing them open?
Most existing walls are filled through small holes drilled near the top of each stud space, so the plaster and siding stay where they are. We blow the insulation in, pack it tight and patch the holes, and the holes can go on either the inside or the outside of the house.
What is the best way to insulate existing walls, from the inside or the outside?
From the inside is usually the better choice unless you're re-siding. Drilling from outside breaks through the house wrap behind your siding, and that wrap then needs patching or full replacement. If the siding is coming off anyway, outside wins, and I'll tell you which side I'd pick once I've seen how your house is put together and what shape the wrap is in.
How are building permits filed in Glendale?
Online. The City of Glendale takes, reviews and issues all its permits through the Glendale Permits Portal, and nothing is filed in person. When your job needs a permit, we do the filing.
Do we have to leave the house while you insulate the walls?
Usually not. Blown cellulose and fiberglass don't come with a wait before you can go back in, the way spray foam does. Our crew covers the floor below the work and closes off the area so dust doesn't travel, and it helps to keep pets out of the room we're working in until we're done.
What should I ask a contractor before they blow insulation into my walls?
Ask how they make sure each wall can take the pressure of insulation being blown in, and how they'll repair every hole so the fill doesn't push back out. Federal guidance suggests both questions, and I'm happy to answer them at your estimate.
Other work that helps your walls
Air sealing services
If you still feel a breeze at the outlets and baseboards, sealing those leaks lets the new insulation do its job.
Basement insulation
When the floors upstairs stay cold, insulating below the house often does more than filling the walls.
Find out what's inside your walls
Call (747) 372-8156 or use the form, and have your house's build year, the wiring type if you know it and any re-siding plans handy so we can start in the right place.
Request an estimateCall (747) 372-8156