Air sealing services in Brentwood CA - a sealed attic and rooms that stay even
Drafty rooms or a hot upstairs usually trace back to gaps in the attic. We find those gaps and close them before anything new goes in.
I go into your attic myself
I come out, climb into the attic or crawl space and write the estimate myself, so the person pricing your job has seen the gaps. Our crew lead then runs the work on site with a small crew.
Sealing first, insulating after, since 2021
I learned this trade crawling attics on someone else's crew, and we've been in business since 2021. We're known for doing attic work in order, with the gaps sealed first and the insulation after, because that's what lets the insulation work.
Licensed and insured, based in Brentwood
We're licensed and insured. California's licensing board describes insulation contractors as the ones who install material that controls heat or sound, and sealing is the prep that comes before it. Call (925) 503-1068 to set up a time.
Air sealing in Brentwood, done in order
Air sealing services in Brentwood close the gaps where air slips into and out of your house, around door frames, ducts and fans and through the holes cut for pipes, vents and wires. It's for homes losing heated or cooled air, and it's the step before new insulation.
In the attic, the gaps that matter usually sit under the old insulation, around light fixtures, pipes, wires, fans and the hatch, which is why you can't spot them from the hallway. Closing the gaps between the attic and your rooms saves energy, lowers the power bill and helps keep moisture problems out of the attic. Insulation laid over an open hole still has air pushing through it, so we always seal first.
The price moves with how many gaps there are and where they sit, how easy your attic is to get into and move around in, and how much old insulation has to come back or come out to reach them. Anything that has to be fixed first, like wet insulation or old wiring, adds to the job and to the schedule. My written estimate lists that prep along with the sealing, so you see the whole job before you decide.
How our air sealing services work
Sealing the leaks that matter most
We start with the holes between your rooms and the attic, because that's where your heated and cooled air gets away and where the gaps hide under old insulation. Our crew pulls the insulation back, closes the openings around wires, pipes, fans, can lights and the attic hatch, then lays the insulation back down or tops it up. The easy gaps downstairs, like a loose door frame, I'll point out at the estimate so you can caulk them yourself and spend your money on the attic.
Fixing the attic before we seal it
Sealing over a problem just locks it in. If the insulation is wet from a roof leak, the framing shows mold or rot, a bath fan blows damp air into the attic, or the attic barely has any venting, that gets fixed first. Old knob and tube wiring on porcelain posts can be a fire hazard when insulation touches it. Gray, pea-size flakes called vermiculite may contain asbestos, so nobody disturbs them until a lab tests them. I'd rather tell you a job isn't ready than do it twice.
Foam or sealing plus loose fill
Spray foam seals air and insulates in one pass, and it costs more. In most attics, sealing the gaps and topping up the blown-in insulation, the loose fill our crew blows in through a hose, does the job for less. Foam earns its price when the ductwork lives up there, and that's where closed-cell foam insulation, a dense foam that also blocks moisture, comes in. If the cold comes up from below, sealing pairs well with basement insulation along the rim joist, the band of framing that sits on the foundation.
Find out which leaks in your house are worth sealing
We reply within one business day, by phone or email, to set up a free on-site estimate. I look at the attic myself and leave you a written estimate, with no pressure to book.
(925) 503-1068What happens on an air sealing job
Call or send the form
Call (925) 503-1068 or send the form, and tell us about drafty rooms, your recent power bills, how you get into the attic and whether you have gas appliances. Then we set up a time for me to come out.
I check the attic and explain
I go up into the attic or crawl space, then walk you through what I found and what I'd do first. The written estimate lists any prep, like damp insulation or old wiring to deal with, beside the sealing work.
Our crew seals and cleans up
Our crew lead and a small crew do the sealing and any insulation that follows, cleaning up as they go. When they're done, they walk the finished job with you so you can see what was closed.
Air sealing questions from Brentwood homeowners
Can I seal the air leaks in my house myself?
Yes, for the obvious ones, like gaps around door frames and the holes where pipes and wires come through. The small leaks buried under attic insulation are harder, and ENERGY STAR rates attic sealing a difficult do-it-yourself job of one to three days, against one to two days with a contractor.
What are the signs my Brentwood home needs air sealing?
Drafty rooms, rooms that run warmer or cooler than the rest, a high heating or cooling bill, dry indoor air in winter and dust in the rooms below the attic all point toward it. No single sign proves it, so I look in the attic to see whether the gaps are there.
Is air sealing safe if I have a gas furnace or water heater?
It can be, as long as the venting gets checked before and after. Sealing can sometimes make gas or oil appliances that vent on their own send combustion gases back into the house, so ENERGY STAR suggests that test. If you have one, we plan the venting check around the sealing.
Is there county help paying for energy upgrades in Brentwood?
Yes, for income-eligible single-family homes through the county's BayREN EASE Home Program. An Energy Advisor recommends upgrades like insulation and duct sealing, and the program covers 80% of the cost of core weatherization measures. Ask the county's BayREN program whether air sealing counts. The older Home+ cash rebate ended in October 2024.