Closed-cell foam insulation in San Luis AZ - a roof deck that's sealed and insulated

Most people call us because the rooms under the roof stay hot, the room over the garage never feels right, or the power bill keeps climbing even after someone added attic insulation. The price moves with the square footage, how many inches the job needs, whether old insulation has to come out and whether the roof needs repairs first. The schedule turns on that roof work and on the day you can get everyone out of the house. I come out, look at it in person and go over what your house needs before I write the estimate, so your own figure comes from that visit.

I start at the roof, because foam sprayed under a leaking deck hides the problem until it shows up in the framing. If the deck leaks or the roof is near the end of its life, I tell you before any foam goes under it. Then I put closed-cell side by side with open-cell, since closed-cell gives you more insulation per inch and costs more, and you should see both sides before you pay for it. The safety checks get done before we seal a house up tight. On spray day our crew closes the gaps around pipes, lights and the hatch, sprays the foam in passes that each rise about an inch, and keeps the depth even at the edges where the roof meets the walls, because that's where thin spots usually show up.

Foam isn't always the answer. If your ducts don't run through the attic, sealing the gaps and topping up with blown-in insulation usually wins on price, and I'll say so. If you're weighing the lighter, cheaper foam, we'll price open-cell foam insulation right beside it, and property managers get the same closed-cell work on shops and offices through our commercial insulation service.

The City of San Luis works from the national residential and energy codes, and it schedules building inspections by phone, email or online. That list doesn't tell you whether your foam job needs a permit, so before work starts we check with the city's building office. If a permit is needed, we pull it and set up the inspections, and if you have questions about the city's rules, I'll point you to the right office.

We're based in San Luis and work in Somerton, Yuma and the cities around them, where we see plenty of single-story homes with the ductwork running through the attic. That's where foam under the roof deck usually earns its price, because it brings the ducts inside the insulated space instead of leaving them out in the attic air.