Air sealing services in Mission Viejo CA - a house that stops leaking air
Drafty rooms, a hot upstairs or a power bill that keeps climbing? We find the leaks, close them and keep your gas appliances breathing.
What does air sealing do for a drafty house?
Air sealing services in Mission Viejo find and close the gaps where your house trades air with the attic and the outdoors, around door frames, pipes, vents, wires, ducts and fans. The drafty rooms settle down, and the insulation up there can finally do its job.
We're Mission Viejo Insulation and Spray Foam, based in Mission Viejo and working in the Orange County cities around it. Most calls start with a drafty room, a hot upstairs or the room over the garage that never feels right, and the leaks behind it are usually in the attic, hidden under the insulation. What moves the price is how many of those leaks there are, how hard they are to reach and how much old insulation has to be pulled back to get at them. The schedule turns on your gas appliances, on any roof leak or wiring that has to be fixed first, and on whether attic insulation goes in right after. Your own figure comes from the estimate, which lists each step in the order we'd do it.
- Fully licensed and insured.
- Free quotes on site.
- Replies within 1 business day.
What air sealing work looks like
How we handle air sealing services
Before we close anything, I ask about your gas stove, oven, furnace and fireplace, because a tighter house still has to feed them air and vent them out. Then I look for the things that stop a job cold, like old knob and tube wiring, vermiculite, a roof leak or a bath fan blowing into the attic instead of outside. I'll also tell you which gaps you can caulk yourself and which ones are worth paying us for, since caulk is cheap and finding the right gap is the hard part. On the job, our crew pulls back the old insulation where the walls meet the attic floor, seals around pipes, wires, ducts, fans and the hatch with caulk on the thin gaps and foam on the wider ones, and keeps the eave vents clear so the attic still breathes. Then the insulation goes back over a sealed ceiling instead of a leaky one.
Foam costs more because it seals air while it insulates, so for most attics I'd rather seal the gaps and top up the loose fill. The exception is when your ductwork runs through the attic, where closed-cell foam, a dense foam that also blocks moisture, can earn its price. If your house has a basement, the same kind of leaks show up along the top of the foundation, and we seal those as part of basement insulation.
Why Mission Viejo homeowners call us for air sealing
The owner writes your estimate
I come out and write every estimate myself, so the person pricing your attic is the one who just crawled through it. You can ask me anything on the spot and get a straight answer.
We'll say when it's not ready
If I find soaked insulation, rodent droppings or a roof that leaks, I'll tell you the job isn't ready rather than seal over it. Insulation hides whatever's under it, so the order matters more than the speed.
Licensed and insured for crew work
We're fully licensed and insured. California lets someone work without a license on jobs under $1,000 only when the job needs no permit and nobody works for them, so anyone who shows up with a crew needs a license whatever the price.
Learned in Orange County attics
I learned this trade on an insulation crew in Orange County attics and started this business in Mission Viejo in 2023. Before that I ran a pool service route, so I've spent a lot of years in other people's backyards.
Have a list of your stoves, ovens, gas furnace and fireplaces ready, and mention any roof leak or bath fan that vents into the attic. Then call (949) 619-8030 or send us the form.
Get an air sealing estimate that starts with your appliances
Send the form and I'll get back to you within one business day to set a time to come out. The estimate is free, done at your house, and there's no pressure to book.
- Fully licensed and insured.
- Free quotes on site.
- Replies within 1 business day.
What happens after you call about air sealing in Mission Viejo?
Call or send the form
Call (949) 619-8030 or send the form, and I'll answer or call you back to set a time. It helps to know roughly how old the house is and which room gives you trouble.
I look and write it down
I come out, look at the attic, walls or crawl space, and write an estimate that lists each step in the order we'd do it. You'll see what it costs and why each step is there before you decide anything.
We handle any permits
If the job needs a permit, we file it with the city or county office that covers your address and book the inspections ourselves. You don't have to learn anybody's portal.
Installers seal, I check
Our installers do the sealing and put the insulation back, and I go up and check it before we call it done. That last look matters, because once a gap is covered, nobody sees it again.
Air sealing questions from Mission Viejo homeowners
How do I know which air leaks I can seal myself?
If you can see the gap and reach it, like around a door frame or where a pipe comes through a wall, you can usually seal it yourself. Doing it yourself falls short on the small, hard-to-find leaks, especially the ones in the attic under the insulation. That's where hiring help makes sense.
Why does air sealing start with checking gas appliances and fresh air?
Sealing and ventilation go hand in hand, so the first step is working out how much fresh air your house needs, both for the air you breathe and for venting stoves, ovens, fuel-burning furnaces and fireplaces. If an appliance fails a spillage test, where exhaust comes back into the room, or a combustion test with the exhaust fans off, national guidance says to call a service technician before the work goes on. Better to learn that before the house gets tighter.
Should I air seal before adding attic insulation?
Yes, sealing comes before insulating, so the gaps get closed before new insulation covers them. The usual order in attic work puts combustion safety and fresh air first, then durability and attic ventilation, then sealing, and the insulation last.
How much does air sealing cost in Mission Viejo?
There's no fair number until someone has been in your attic, because the price follows the number of leaks, how hard they are to reach and how much insulation has to be moved to get at them. Caulking the easy gaps yourself brings it down, and sealing in the same visit as new attic insulation saves pulling things back twice. Choosing foam where caulk would do pushes it up.
How do I get a building permit in Mission Viejo?
The City of Mission Viejo handles all its permits and inspections online, and you register and submit through its Client Self Service Online Portal. If you're not sure whether your job needs one, the city is the place to ask.
How do I find hidden air leaks in my house?
Home energy assessors find them with a blower door test, a fan set in a doorway that pulls air out so the leaks show, and a thermal camera that shows where air is slipping in. They can also check ventilation so water vapor or harmful gases don't build up. On an estimate visit, I'll point out what I find in the attic.
Other work that pairs with air sealing
Basement insulation
Houses with a basement leak along the top of the foundation walls, and insulating down there is the time to close those gaps under your floors.
Closed-cell foam insulation
When ducts run through the attic or a space has to hold back moisture, dense foam seals and insulates in one pass.