Air sealing services in Lawndale CA - fewer drafts and rooms that hold their temperature
Drafty rooms, a hot upstairs or a power bill that keeps climbing usually mean air is slipping through gaps we can find and close.
- Fully licensed and insured.
- Free estimates at your property.
- We respond within 1 business day.
What does air sealing do for a drafty house in Lawndale?
Air sealing services in Lawndale close the gaps where air slips in and out of your house, around pipes, wires, lights, doors and the attic hatch, so rooms hold their temperature and the drafts stop. Most of the time on a job goes into finding the hidden leaks, not sealing them.
Most people call us because a room won't stay comfortable, often the room over the garage or a hot upstairs, and adding insulation hasn't fixed it. The price moves with how many leaks are hiding, how hard the attic is to get around in, and whether anything like old wiring or damp wood has to be dealt with first, and the schedule turns on those same fixes plus any permit the city requires. Your written estimate gives you the figure for your house, and if most of the leaks are overhead, attic air sealing covers that part of the house in more detail.
How can you tell your house is leaking air?
Drafts at outlets and trim
If you feel moving air at outlets, baseboards or around door frames, it's coming through gaps in the framing behind them. Those leaks make your furnace and AC work harder, and the longer they stay open, the more of that shows up on the power bill.
Hot upstairs, cold floors
When the upstairs or the room over the garage runs hot and the floors downstairs stay cold, air is usually moving between the attic or crawl space and the rooms. More insulation alone rarely fixes it, because air passes right through loose insulation.
Damp or stained wood
Water stains, warped boards or a musty smell in the attic or crawl space can mean leaking air is carrying moisture into the wood, or that the roof is leaking, and I check for both. Left alone, that moisture can warp the framing and lead to mold, which is a bigger and messier job than sealing.
How we handle air sealing services
We start by finding the leaks, because a lot of drafts hide under the insulation where you can't see them. If you have a gas furnace, water heater or fireplace, we look at how each one gets fresh air before we seal anything, since tightening the house changes that. Then we pull back the insulation at the usual spots, around can lights, pipes, wires, the attic hatch and the tops of the walls, seal those gaps with caulk or foam, and keep the vents along the eaves clear so the attic can still breathe. The insulation goes back down or gets topped up only after the sealing is done, because insulation laid over open gaps just ends up fighting a draft.
Sealing often leads into the next job. In a house with a lower level, the same gaps show up where pipes and wires come through, and basement insulation finishes what the sealing starts down there. Where ducts run through a hot attic, we may suggest closed-cell foam insulation, a dense foam that blocks moisture, so the sealing and the insulating happen in one pass.
Seal, then top up loose fill
This suits most attics with no ductwork up there, because sealing the gaps and then adding blown-in insulation, loose fill blown through a hose, costs less than foam and works well. It's what I recommend for most houses we see.
Seal with spray foam
This makes sense when the ducts live in the attic, because foam seals the air while it insulates around them. It costs more, so I only suggest it where the ducts make it worth it.
Seal doors, floors and openings
This suits a house that's drafty at floor level or around the doors, even when the attic is in decent shape. We work around door frames, the crawl space and the spots where pipes and wires come through.
Get a written air sealing plan for your house
We reply to every call and form within one business day to set up a visit. The estimate is free and done at your home, and there's no pressure to book once you've read it.
(424) 528-1317- Based in
- Lawndale, CA 90260
- Hours
- Mon–Fri: 7 AM–9 PM, Sat–Sun: 6 AM–9 PM
What happens after you call us about air sealing?
Here's how an air sealing job runs from your first call to the final walk-through, and who you'll be dealing with at each step.
Call or send the form
Call (424) 528-1317 or send the form, and we'll set a time for me to come out. It helps to mention which rooms feel drafty and where your attic hatch is.
I come out and measure
I go through the attic and around the house, measure, and note anything that has to be dealt with first, like old knob and tube wiring, damp spots, a bath fan venting into the attic or insulation that looks like vermiculite. Vermiculite can contain asbestos, so we stop and check it before anyone disturbs it.
Get your written estimate
You get a written estimate that lists each step in the order we'll do it, so you can see what has to come first and what the work will cost. If you go ahead, we sort out any permits before the crew starts.
We seal, then walk through
Our crew does the install with me on site, within the hours the City of Lawndale allows, 7 a.m. to 7 p.m. on weekdays and 8 a.m. to 5 p.m. on Saturdays, with no work on Sundays or city holidays. When we're done, I walk through the finished job with you.
Why Lawndale homeowners call Evergreen Lawndale Spray Foam Insulation for air sealing
I measure and stay on site
I come out myself to look, measure and write the estimate, and I'm there while our crew does the install. The person who found your leaks is the one making sure they get sealed.
Running this business since 2023
I spent years in attics and crawl spaces, worked outside the trade for a long stretch, then came back and started this business in Lawndale in 2023. Coming back meant reading the current guidance closely instead of going on habits from years ago.
Licensed and insured in California
We're fully licensed and insured. When air sealing comes with new insulation, the state contractor board has a separate license class for insulation work, so it's fair to ask any crew which license covers that part of your job.
I'd rather tell you a job isn't ready yet than seal it twice, so ask for an estimate and I'll tell you what has to come first in your house.
Air sealing, ductwork and permits in Lawndale
The city issues building permits for insulation and for replacing doors and windows, but its permit list doesn't name air sealing, so whether your job needs one isn't settled until we ask. Work on ducts, ventilation, appliance vents or a furnace falls under the city's mechanical permit, which matters when sealing turns up a leaky duct or a vent that has to be redone. Before work starts we check with the city's permit center for your address, and when a permit is needed we take care of the paperwork and the inspection.
Around Lawndale we see a lot of older houses with can lights, ductwork running through the attic and a room over the garage that never feels right, and the worst leaks usually sit where those meet the ceiling. We find the same patterns on jobs in Torrance and Hawthorne, so we check those spots first in every attic.
Questions about air sealing in Lawndale
How much does air sealing cost in Lawndale?
There's no set price, because the cost turns on what's hiding in your attic and walls, and I give you a figure after I've seen it. A few open gaps around the hatch and pipes is a smaller job than leaks spread under all the old insulation, and choosing spray foam over sealing and topping up loose fill raises the price. Pulling out insulation that's soaked or full of droppings, or fixing wiring or a roof leak first, adds to it too.
What is the difference between air sealing and insulation?
Air sealing works like a windbreaker, and insulation works like a sweater that keeps you warm but lets the wind straight through. Insulation's R-value, how well it slows heat, says nothing about air moving through it, so a house with plenty of insulation can still be drafty. Most houses do best with both.
Can I seal the air leaks in my house myself?
Yes, for the obvious ones, like gaps around door frames and where pipes, vents and wires come through the walls. What you'll miss are the small leaks hidden under the attic insulation, which a certified home energy assessor finds with a blower door test, a fan that pulls air through the house, and an infrared camera. If your drafts seem to come from overhead, that's work for a pro.
What is the best way to air seal a house with a gas furnace or fireplace?
Work out how much fresh air the house and its furnace, stove or fireplace need before sealing anything, because an appliance that burns fuel without enough air can give off carbon monoxide. That's why combustion air ducts, the openings that feed those appliances, stay open, along with the vents at the eaves, ridge and gable ends, since they only work with air moving through them. It's a planning step, not a reason to skip sealing.
When is HERS testing needed for air sealing in California?
It depends on the work, because the California Energy Commission says HERS testing, a check by a home energy rater, may be required for some jobs, and properly permitted work triggers whatever testing is needed. If your job needs it, the rater may need to reach your breaker panel and your attic or crawl space, and may ask you to close the windows and outside doors and turn off the dryer or bathroom fan. We'll tell you whether your job calls for it when we check on the permit.
How long does air sealing take, and do we have to leave the house?
I can tell you how long once I've seen the attic, because the time goes into finding the hidden leaks and handling anything that has to be fixed first. Sealing with caulk and canned foam usually doesn't mean leaving home. If the job includes spray foam, there's a re-entry time, the wait before you, the kids and the pets come back inside, and we'll tell you what it is before we start.
Related services that often follow air sealing
Basement insulation
Once the gaps around pipes and the rim are sealed, insulating basement walls keeps that lower level from pulling cold, damp air into the rooms above.
Closed-cell foam insulation
When ducts run through a hot attic, dense closed-cell foam seals and insulates in one coat and blocks moisture, which loose fill on its own can't do.
Service areas for our air sealing work
Evergreen Lawndale Spray Foam Insulation is based in Lawndale, California, and we work across the South Bay and the cities around it. These 12 cities have their own pages, from Gardena to Redondo Beach, and they're not the only places we go.
Lawndale, CA
Book an air sealing estimate in Lawndale
Mention any gas furnace, water heater or fireplace when you call (424) 528-1317 or send the form, so I can plan the fresh-air check for the same visit.