Air sealing services in Simi Valley CA - rooms that hold their temperature
Drafty rooms, a hot upstairs or a power bill that keeps climbing usually trace back to hidden gaps. We find them and close them.
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Do I need air sealing, or just more insulation?
Air sealing services in Simi Valley close the gaps where air slips in and out of your house, so rooms stop feeling drafty, your heating and cooling don't have to work as hard, and less moisture gets into the wood, where it can lead to mold.
Most people call us because one room never feels right, the room over the garage bakes, or the bill climbs with nothing obvious to blame, and if you're already planning attic insulation, the sealing fits into that same job. The price and the schedule mostly come down to how many leaks there are, how easy your attic and crawl space are to get into, and whether old insulation has to be moved or pulled out first. I'll walk the space with you and put the scope in writing, so you know what we're doing before we start.
How our air sealing services work
On the estimate visit I walk the house with you and point out the easy leaks around doors and pipes that you can often seal yourself, then I look at what's up in the attic and down under the floor. Our crew handles the hidden leaks you can't reach or see. In the attic we pull the insulation back at each spot, seal around can lights, pipes, wires and the attic hatch, keep the eave vents clear so the attic can still breathe, and lay everything back evenly so the edges don't end up thin. Under the floor we close the gaps where pipes and wires come up into the house. If I find a roof leak, insulation that's wet or full of droppings, or old wiring, I'll tell you to deal with that first, because sealing over it only hides the problem. I look over the work before we finish.
Sealing usually goes hand in hand with insulation. If your house has a basement, we often follow the sealing with basement insulation so the floor above stops feeling cold, and where ductwork runs through the attic I may suggest closed-cell foam insulation, a dense foam that also blocks moisture.
Air sealing on Simi Valley homes
The city's Building and Safety Division does plan reviews and inspections for projects in Simi Valley and checks the work against California's building, mechanical and energy codes. The Energy Code sets efficiency and indoor air quality rules for changes to existing houses, not just new ones, so sealing and insulating a house that's already standing is still work the code has a say in. Whether a sealing job on its own needs the city's sign-off isn't something I'll guess at, so ask that office, and I'll go over what I find on your walk so you have the details ready when you call.
A lot of the attics we open here carry ductwork, and sometimes a furnace or water heater, so that's where we look first. We see the same kinds of houses on jobs in Thousand Oaks and Moorpark.
Air sealing and insulation work
Get a written air sealing plan for your house
We reply to every call and message within one business day, and then I set a time to walk your attic and crawl space with you. The estimate is free, on site and comes with no obligation, and you get the scope in writing.
(805) 261-5026Air sealing questions from Simi Valley homeowners
Can I seal air leaks in my house myself?
Yes, for the obvious ones around door frames and where pipes, vents and wires come through a wall. The small, hard-to-find leaks, especially the ones in the attic buried under insulation, are a job for a pro, because you can't see them and you'd be crawling across ceiling joists to find them.
How do I find hidden air leaks in my house?
Home energy assessors usually find them with a blower door test, which pulls air out of the house so the leaks show up, and a thermal camera that shows where outside air is getting in. If you hire an assessor, it's fair to ask whether they hold a BPI Building Analyst or RESNET HERS Rater certification, the two that are recognized nationally.
What is the best way to air seal and insulate an attic?
Seal the leaks first, then add insulation. Building America attic guidance says all the major leaks should be sealed before insulation goes in, while they can still be reached, so if you're planning new attic insulation, book the sealing as part of the same job.
How much does air sealing cost in Simi Valley?
There's no flat price, because the cost comes down to how many leaks your house has and how hard they are to reach. A tight attic hatch, old insulation that's wet or full of droppings and has to come out, or choosing foam over a loose-fill top-up all raise it, while an open attic with dry insulation keeps it lower. You'll get your own number in writing after the estimate visit.
Is air sealing safe if I have a gas furnace or water heater in the attic?
It can be, but it needs planning, because sealing an attic, crawl space or room with fuel-burning appliances changes how much air they get to burn with. Building America guidance calls for working out that combustion air and running combustion appliance zone testing, a set of safety checks on the space the appliance sits in, so plan that testing into the job. Tell me about any gas appliances when you call, and I'll write them into the scope.
How much can a contractor ask for up front in California?
On a home improvement job in California, a contractor can ask for a down payment of no more than $1,000 or 10 percent of the contract price, whichever is less. After that, each payment must match work that's already done or materials that have been delivered to your house.
Get your Simi Valley attic checked for leaks
Call (805) 261-5026 or use the form, and have a few notes ready on which rooms feel drafty, where your attic hatch is and whether a gas furnace or water heater sits up there or under the floor, so I can plan the visit around them.