Spray foam insulation
Foam seals air while it insulates, so it's our pick where ductwork runs through a Norwalk attic or the room over the garage needs a tight fit. It does cost more.
Insulation contractor in Norwalk, CA - attics sealed before new insulation goes in
South Whittier Insulation and Spray Foam is an insulation contractor based in South Whittier, CA, working in Norwalk homes to seal attic gaps, clear out old insulation and add blown-in or spray foam where rooms won't stay comfortable.
How we handle insulation in Norwalk houses
Norwalk is mostly blocks of single-story houses, a lot of them older, with shops, offices and small businesses along the bigger streets. We're based close by in South Whittier and work here the same way we do in Whittier and Downey, so most of the attics we climb into here look familiar.
In an older attic, the first thing I check is what's already up there. I look at how many inches there are, whether it's dirty or packed flat, and whether the can lights, pipes and hatch are leaking air into the rooms below. Those same things move the price and the schedule. That means how much old material has to come out, how many gaps need sealing, how easy the attic is to move around in, and whether foam makes sense because the ductwork runs up there. I come out and write the estimate myself, so you know exactly what you're paying for before we start.
Licensed for the work
In California, a contractor needs a state license for work worth $1,000 or more in labor and materials, or for any job that needs a building permit. We're licensed and fully insured.
Permits checked before we start
Before work starts, we check which building office covers your Norwalk address and what it asks for. When your job needs a permit, we handle the paperwork and line up the inspections.
Gaps sealed before anything goes down
New insulation over a draft or a soaked layer just hides the problem. So we seal around lights, pipes and the hatch first, and we keep the eave vents clear.
Insulation services for Norwalk homes and buildings
Attic insulation
We check how many inches are already up there and what shape they're in. Then we seal the gaps and bring coverage up evenly, with the edges as deep as the middle.
Blown-in insulation
Blown-in insulation is loose fill blown through a hose. It tops up older attics and settles around wiring and framing, which suits the low, tight attics in many single-story homes here.
Home insulation
When several rooms are drafty or the power bill keeps climbing, I look at the attic, walls and floors together. That way we fix the biggest leak first.
Insulation removal
Old insulation that's soaked, flattened or full of droppings has to come out before anything new goes in, or the problem stays. We vacuum it out, bag it and clean up.
Crawl space insulation
In houses with a crawl space, insulating under the floor helps with cold floors. We check for moisture down there first so the new material stays dry.
Wall insulation
Older walls often have little or nothing inside. We can add insulation through small openings, which helps rooms that stay drafty even after the attic is done.
Air sealing services
We close the gaps around can lights, pipes, wiring holes and doors before any insulation goes in. If we skipped that, the new layer would just fight a draft.
Basement insulation
Where a house or building has a basement, we look for dampness before we insulate the walls. That way we don't trap moisture behind the new layer.
Closed-cell foam insulation
Closed-cell foam is a dense foam that blocks moisture. It fits spots where water is a concern, like the underside of a floor or a wall that runs damp.
Open-cell foam insulation
Open-cell foam is softer and lighter than closed-cell and expands to fill odd cavities. It works well in rooflines and walls where moisture isn't the issue.
Commercial insulation
For property managers and small business owners in Norwalk, we insulate offices, shops and rental units. We plan the work around your tenants and your hours.
Crawl space vapor barrier
We lay a plastic barrier over the dirt in a crawl space to keep ground moisture from rising into the floor framing and insulation. We seal the seams so it stays put.
Vapor barrier installation
We put vapor barriers where moisture would otherwise reach the insulation. Before anything goes up, we check which side of the wall or floor the barrier belongs on.
Attic air sealing
Before we add any attic insulation, we seal the can lights, vent pipes, wiring holes and hatch from above. That keeps warm or cool air in the rooms below.
Retrofit insulation
Older Norwalk homes often have thin or settled insulation from years back. We add to what's there when it's clean and dry, and pull it out first when it isn't.
Get a free on-site insulation estimate in Norwalk
Send the form and we'll reply within one business day to set a time. I'll come out to your Norwalk house, look at the attic and write the estimate myself, free and with no obligation.
I come out myself
I look at the job and write the estimate, so the person pricing it has actually been in your attic. Our crew lead runs the install, and I check in on the work.
Every step spelled out
The estimate lays out what comes out, which gaps get sealed and what goes in. That makes it easy to see each part of the job and compare it fairly.
Straight advice on what comes first
If the roof leaks or the old insulation should be tested first, I'll tell you. New insulation laid over a problem won't hold up.
Questions Norwalk homeowners ask about insulation
Here are straight answers on state licenses, small side jobs, earthquake maps and what happens on spray foam day.
Does my insulation contractor in Norwalk need a California state license?
Yes, if the job is worth $1,000 or more in labor and materials combined, needs a building permit, or uses employees or other workers. That rule comes from California's Contractors State License Board, and it covers Norwalk. We're licensed and fully insured, and I'm glad to share our license details at the estimate.
Which small jobs can someone do without a contractor license in California?
Only small jobs that meet every one of these conditions. The total must stay under $1,000, counting labor, materials and every other cost, even when it's split across more than one contract. The job can't need a permit or use employees, and the person can't advertise as a licensed contractor. The limit used to be $500. Owners improving their own property can also be exempt when they do the work themselves or with their own paid employees.
How can I check if my Norwalk address is in an earthquake hazard zone?
Type your address into the state's EQ Zapp map. It shows whether the property sits in a mapped earthquake hazard zone. It also tells you if the state hasn't evaluated your area yet, so you'll know whether a clean result means much.
Do we have to leave the house during spray foam insulation?
For spray foam, yes. Plan on being out until the foam maker's re-entry time has passed, which is how long before people and pets can come back inside. I'll tell you what that is for the product we're using before the job is booked, so you can plan for the kids and pets.
Insulation work across our service area
These are the cities with their own page on our site. We take jobs in other cities around South Whittier too, so if yours isn't listed, call and ask.
Book a look at your Norwalk attic
Call (562) 358-3003 or use the form, and I'll tell you how many inches are up there and whether any should come out.