Hot upstairs rooms or a room over the garage that never feels right? Foam under your roof deck seals and insulates in one pass.
Spray foam insulation in Merced is foam we spray onto the underside of your roof deck, where it becomes your house's insulation and its air seal at the same time, so heat and drafts stop finding their way through the attic.
Foam costs more than other insulation, and I'll tell you straight when it isn't worth it. If your furnace and ducts sit in the attic, foam under the roof deck pulls them inside the insulated part of the house, so the ducts lose less heat and any air leaking from them still heats or cools your rooms. If they don't, sealing the gaps and topping up the loose fill you already have usually gets you more for your money.
The price moves with the size of the attic, whether you need open-cell or closed-cell foam, whether old insulation has to come out first and whether the foam needs a covering over it. The schedule turns on the attic itself, because foam needs the right air and surface temperatures, humidity and dry surfaces when it goes on, so dates can shift. It also turns on how long your household needs to stay out. The written estimate I give you after looking spells out what I found and what I'd do.
Here's who does what from the first visit to the last check, so you know what you're getting before anyone climbs into your attic.
I come out to look at every job myself, get up in the attic with a flashlight and write down what I find, from wet spots and droppings to where the ducts run. Your written estimate comes from those notes, and I'll show you photos so you see what I saw.
The state licensing board counts anyone who installs insulating material for heat or sound control as an insulation contractor, so spraying foam in your attic is licensed work. We're licensed and insured.
We've been in business since 2017, and our own crew does the spraying. I check the work over before we call the job finished.
Before we spray, we talk through who's living in the house, any health worries and when it's okay to come back, going by the guidance from the maker of the foam we use. If foam isn't a good fit for your household, we'll point you to a different insulation, because I'd sooner tell you that than sell you the wrong job. When foam is the right call, we pick the foam for your roof, get the attic ready and spray the underside of the roof deck.
Spray foam isn't the only fix for a hot upstairs. When your ducts aren't in the attic, we usually steer you toward attic insulation, where we seal the gaps around lights, pipes and the hatch first and then top up with blown-in insulation, loose fill blown in through a hose.
We do the steps in this order because foam sprayed over a problem just seals the problem in.
If a furnace or water heater burns fuel up there, federal building guidance says any such appliance in a sealed attic should be a direct-vent, sealed-combustion unit that vents outdoors. We go over that with you first, so the attic doesn't get sealed around the wrong equipment.
Insulation that's been soaked or is full of droppings comes out before any foam goes on, because spraying over it leaves the problem in place. We also cover and protect the spots that shouldn't get foam on them.
Once the attic's temperature, humidity and surfaces are where the foam needs them, our crew sprays the underside of the roof deck. I'd sooner move the date than spray into a damp attic.
The space airs out according to the foam maker's guidance before you come back in. I check the work over before we call it finished, and we leave the house clean when we pack up.
Send the form or call (209) 308-1021, and we'll get back to you within one business day to set up a visit. I come out myself, look at the attic and give you a free written estimate with no obligation. It helps if you have your home's square footage handy, know whether the heating system sits in the attic and can tell us about any health concerns in the household.
(209) 308-1021Insulation work in Merced usually costs about $1 to $5 per square foot, and that's the range for insulation in general, not a spray foam quote. Where your job lands depends on the foam type, the size of the attic and what has to come out first, and your written estimate gives you your own figure.
Under a roof deck, open-cell foam insulates but lets moisture vapor pass through, while closed-cell foam, the dense kind, insulates and blocks vapor too. The choice comes down to whether your roof needs the foam itself to hold back moisture, and I'll tell you which one fits after I've looked at your roof deck.
EPA guidance says everyone not doing the work should leave the home while the foam goes on, with timing worked out with the contractor, and some manufacturers suggest waiting 24 hours before coming back, though it varies by product. Ask for the maker's guidance on airing out and return times for your specific foam, and we'll go over it with you before we start.
It may not be, because EPA guidance names people with asthma, respiratory allergies or skin conditions, and anyone already sensitized to isocyanates, a chemical in spray foam, as people who should read the product information carefully before choosing it. The same guidance says they may want to consider safer alternatives, so tell me at the estimate and we'll point you to a different insulation if foam isn't right.
Insulating an existing house in Merced falls under California's energy rules, because the state Energy Code sets efficiency requirements for changes to existing homes, not only for new houses and additions. The newest set of those standards took effect at the start of 2026, so that's the set that applies to work on your house now.
We're based in Merced and work in many cities around it, north toward Modesto and south toward Madera. We get a lot of calls about older houses, rooms over the garage that never feel right and damp crawl spaces, and every attic gets the same careful look and written notes wherever you live.
One look up there usually settles whether foam is worth it for your house, so call (209) 308-1021 or send us the form.
If you're not sure spray foam is right for your house, ask us and we'll tell you straight.
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