Air sealing services in El Monte CA - upstairs rooms that hold the cool air
Drafty rooms and an upstairs the AC can't keep cool? We find the hidden leaks and close them so the cool air stays inside.
Does your El Monte house need air sealing?
Air sealing services in El Monte close the gaps where your house trades air with the attic, the crawl space and the outdoors, mostly with caulk and foam, so the cool air you pay for stays in your rooms. On most houses the work centers on the attic floor, where the leaks are hardest to see.
Most people call us at Expert El Monte Insulation Services because the upstairs won't cool down or the power bill keeps climbing, and the leaks behind it are usually up in the attic under insulation that's been sitting there for years. The price moves with how much of that old insulation we have to move or pull out to reach the leaks, whether it's wet or full of droppings, how many pipes, wires and can lights go through the ceiling, and whether new attic insulation goes back in when we're done. The schedule turns on the same things, plus testing if you have a gas appliance and inspections if the job needs a permit, and I'll tell you at the estimate whether yours does. You'll get your own number after I've been up there and seen it.
What our air sealing services include
I start by going up in the attic and checking what's there before anyone touches it, because putting new work over old insulation that's soaked or full of droppings just keeps the problem. If something looks unsafe, like old wiring, a roof leak or a bath fan blowing into the attic, I stop and tell you instead of covering it up. Then our crew moves the old insulation back to get at the attic floor and seals the big, easy leaks around pipes, vents and the hatch. Most of our time goes into the small leaks hiding under the old layer, around wires, can lights and the top plates, the wood along the top of each wall, because that's where the air keeps slipping through. When we put the insulation back or add blown-in, loose fill blown through a hose, we keep the eave vents clear and bring the edges up as deep as the middle.
Some houses need more than sealing. If you've got a basement or a below-grade room that runs cold and damp, basement insulation goes in after the gaps down there are closed. People also ask about spray foam, and closed-cell foam insulation, a dense foam that also blocks moisture, seals and insulates in one pass, but it costs more. I usually recommend sealing the gaps and topping up loose fill instead, unless your ductwork runs through the attic, where foam is often worth the extra money.
Why El Monte homeowners call Expert El Monte Insulation Services for air sealing
The person who quotes is there
I come out to look at your house and write the estimate myself, and I'm in the attic with my crew when we do the work. Nothing gets lost between what you were told and what actually gets done.
Six years on lived-in homes
We've been in business since 2020, and before that I spent years insulating new houses for builders where the attics were empty. A house people already live in is a different job, with old insulation, wiring and storage in the way, and that's the work we chose to focus on.
Permits pulled, inspections set up
When a job needs a permit, we pull it through El Monte's Building Department, which handles plan review, permits and inspections in the city, and we schedule the inspections. The state says some energy work also needs HERS testing, an outside check of the work, and a properly permitted job brings in whatever testing yours needs.
Licensed and insured in your attic
We're licensed and insured. It's a fair thing to ask before any crew goes up in your attic, and I'm glad to answer it at the estimate.
If your rooms are drafty or the upstairs won't cool off, call (626) 416-2112 or send us the details, and tell us what you've noticed and whether you have a gas water heater or furnace.
Get a free on-site estimate for air sealing
We get back to you within one business day to set up a visit. I come out myself, look in the attic and around the house, and write your estimate on site, free and with no obligation.
What air sealing looks like
Questions before you book air sealing
How do I know if my house needs air sealing?
Your house may need it if you have drafty rooms, rooms that run hotter or colder than the rest, high cooling or heating bills, or dust settling in the rooms under the attic. National guidance from ENERGY STAR treats those as signs a home may be a good candidate for attic air sealing, so the attic is the first place to look, and it's where I start at the estimate.
Can I seal the air leaks in my house myself?
You can handle the obvious ones yourself, like gaps around door frames and spots where pipes, vents and wires go through outside walls, with caulk or foam. The small, hard-to-find leaks are another story, especially in an attic buried under layers of insulation, because you have to move that insulation to reach the attic floor and then find leaks you can't see. That hidden part is most of what we're hired for.
What is the best way to find air leaks in a house?
Certified home energy assessors find leaks with a blower door test, a big fan in a doorway that pulls air out of the house so the leaks show up, and a thermal camera that shows hot and cold spots. If you want that kind of test, the BPI Building Analyst and the RESNET HERS Rater are nationally recognized certifications to ask about. On our jobs I also pull back the old insulation and look, because many of the leaks we seal are sitting right there under the old layer.
Is air sealing safe if I have a gas water heater or furnace?
It can be, as long as the appliance gets tested, because tightening up a house can sometimes cause an appliance that vents naturally to back-draft, pulling exhaust gases back into your home. ENERGY STAR suggests that homes with gas or oil appliances consider having a Home Performance Contractor test them before and after sealing. If you have one, we plan for it to be tested after we seal, so mention it when you call.
How much does air sealing cost near El Monte?
A budget attic job in the Los Angeles area, blown-in insulation with sealing at the obvious gaps, usually costs about $1,200 to $1,500. That's what the work usually runs around LA for an attic insulation job with basic sealing included, not sealing on its own and not our price, so a house with lots of hidden leaks or old insulation to clear out can land somewhere else. Your own number comes from the estimate, and our work is backed by our satisfaction guarantee.
Should air sealing be done before adding insulation?
Yes, seal first, because closing the leaks before you insulate gets you the most energy savings out of the job. Once fresh insulation goes down over open gaps, it's fighting a draft, and the leaks are buried where nobody can reach them without digging it all back up.
Related insulation work
- Basement insulation
If a lower room or basement still feels cold and clammy once the leaks are closed, insulating its walls is usually the next step.
- Closed-cell foam insulation
When your ducts run through a hot attic, dense foam that seals and insulates at the same time can be worth paying more for.