Air sealing services in Gardena CA - a less drafty house with its hidden leaks closed
Drafty rooms or a hot upstairs? We check your gas appliances first, then find and seal the hidden leaks that keep air moving.
Why does my house feel drafty, and will air sealing fix it?
Air sealing services in Gardena close the gaps where air leaks in and out of your house: around door frames, where pipes, vents and wires pass through outside walls, and in the attic, where plugging the big holes does the most good. Once those gaps are sealed, the house holds its air, and any insulation you add can do its job.
Most people call us about a hot upstairs, a cold room over the garage or a power bill that doesn't make sense, and the leaks behind it are usually hidden under the insulation in the attic. The price depends on how many gaps there are, how hard the attic is to move around in and whether the old insulation has to be pulled back or taken out before we can reach them. The schedule mostly depends on attic access and whether you're adding attic insulation afterward, because those two get planned together. After I've looked at your house, the written estimate gives you the figure and the order of the work.
What our air sealing services include
I start with safety. A sealed house lets in less air by accident, and your furnace, water heater, stove and any fireplace still need enough air to burn cleanly. So before we close anything, I look at your gas appliances and how much fresh air the house needs, because an appliance that's short on air runs poorly and can give off carbon monoxide. It's like a kitchen, where you prep before you cook. Then our crew pulls back the insulation and goes after the leaks a can of store-bought foam won't reach. Those are the tops of walls where they meet the attic floor, dropped ceilings over cabinets and hallways, can lights, pipe and wire holes, and the attic hatch. If the old insulation is soaked or full of droppings, I'll tell you, because putting it back would leave the problem in place. Otherwise we lay it back evenly, out to the edges, instead of piling it in the middle.
Once the gaps are closed, most attics do fine with a top-up of loose fill, and that's usually what I'd pick. Foam costs more because it seals air while it insulates, so closed-cell foam insulation, a dense foam that also blocks moisture, earns its price mostly when your ductwork runs through the attic. Leaks don't stop at the ceiling either. If you've got cold floors over a lower level, basement insulation can be part of the same plan.
Air sealing services in Gardena and what the city asks for
Gardena requires permits for most residential remodel, repair or alteration work. Its permit list names jobs like re-roofs, electrical upgrades and window change outs, but it doesn't name air sealing, so the list doesn't tell you whether your job needs a permit. The city's Building Official answers those questions by email at building@cityofgardena.org or by phone. We find out which office covers your address, the city or the County, and when a permit is needed we handle the paperwork, set up the inspections and keep you posted.
Many of the houses we're called to here are older, with can lights and wiring added over the years and gas appliances tucked into hall closets and garages. We see the same kind of house on jobs in Torrance and Hawthorne, and we work them the same way.
How air sealing works with us
Call us or send the form
Call (424) 292-2987 or use the form, and we'll set a time for me to come out. A line about what's bothering you, like a hot room or a high bill, tells me where to start.
I look at the house with you
I check the attic and your gas appliances with you, take photos and explain what I see and the order I'd do the work in. Your written estimate lists each step and why it's there, so you know what each part of the price pays for.
Our crew seals the leaks
My lead installer runs the crew on the day and works through the leaks in the order we went over at the estimate. If they find something that changes the plan, like a damp spot or old wiring, you hear about it before they go further.
Walk through the finished attic
When the work is done, the lead installer walks you through it and shows you where the gaps were closed. You'll know what was done up there without having to climb the ladder yourself.
Ask for an air sealing estimate at your house
Send the form and we'll reply within one business day to set a time for me to come out. The estimate is free and done on site, and there's no obligation to go ahead with any of it.
Questions before you book air sealing
Can I seal air leaks in my house myself?
You can often seal the obvious ones yourself, like gaps around door frames, ducts and fans. The small, hard-to-find leaks get missed that way, especially attic leaks hidden under the insulation, and those need a different approach. That hidden part is usually what we're called in for.
How much does attic air sealing cost in the Los Angeles area?
Attic air sealing in the Los Angeles area usually costs about $350 to $2,300 per job. That's the usual range for the area, not our price. Your written estimate gives the figure for your house after I've seen the attic.
What is the best way to air seal before adding attic insulation?
Seal first, then insulate, because once new insulation covers the attic floor, the leaks underneath are much harder to reach. One federal attic guide deals with combustion safety and indoor air first, then durability and attic ventilation, and finishes the sealing before any insulation goes in. If you're planning to add insulation, scheduling the sealing ahead of it gets you the most energy savings.
Which vents should stay open when you air seal an attic?
Combustion air ducts and the soffit, ridge and gable vents stay open, because they're meant to move air and only work when nothing blocks them. We also keep insulation back from the eave vents, since a buried vent stops the attic from breathing and moisture can end up in the framing.
How do I know if my attic has air leaks?
Dirty insulation is one of the clearest signs, because the dust shows that air has been moving through it. If you see dark patches up there, take a photo before you call so we know where to start.
What gets checked in the attic before air sealing starts?
A careful job starts by inspecting the work area for active knob and tube wiring, vermiculite insulation, bathroom fans that vent into the attic, roof leaks, unvented kerosene heaters or gas fireplaces, and attic flooring. Each of those changes the plan, and some, like old wiring, are a job for another trade before we seal anything.
Why Gardena homeowners call Professional Gardena Insulation Company for air sealing
The owner writes your estimate
I've run this business since 2013, and I still come out to look at the job and give the estimate myself. You're talking to the person who decides the order of the work, so you can ask why about any step and get a straight answer.
Based here, used to older houses
We're based in Gardena, and most of our calls come from owners of older houses and from the landlords and property managers who look after rentals. We're used to finding what years of repairs and add-ons leave behind in an attic.
We're licensed and insured
We're licensed and insured. When a crew is moving around your attic near wiring, ducts and gas vents, you want that in place before anyone climbs up.
Satisfaction guaranteed on every job
Satisfaction guaranteed on every job is our promise. The walkthrough at the end is your chance to see the work and ask about anything that doesn't look right.
With air sealing, the order of the steps matters more than the materials. When you're ready, call (424) 292-2987 or send us your details, and I'll come take a look.
Other work that often goes with air sealing
Basement insulation
If your floors stay cold after the attic is sealed, the air may be coming from below, and insulating the lower level deals with that end of the house.
Closed-cell foam insulation
When ducts run through a hot attic, a dense foam that seals and insulates in one layer can be worth its higher price.
Book an air sealing visit for your home
Before I come out, jot down your gas appliances, where the attic hatch is and any insulation you're planning, so I can look at all of it in one visit.
