Insulation contractor in San Luis, AZ - cooler rooms, attics sealed right
B&T San Luis Spray Foam Insulation is an insulation contractor based in San Luis, AZ. We insulate and air seal attics, spray foam walls and rooflines, and clear out old insulation for homes and commercial buildings here.

Get an insulation estimate for your house
I climb into the attic, measure what's up there, and show you what I find.
Request an estimateSan Luis: low houses, very hot attics
San Luis is where we're based, and most of our calls here start the same way: a bedroom that won't cool down, a room over the garage that's hot by noon, or a power bill that jumped in July. A lot of the houses are one story with the attic right over the rooms you live in, and the ductwork often runs through it, so whatever is going on up there you feel all through the house. We see older homes with a thin, settled layer that's been up there for years, and newer ones where the builder put in enough to pass and moved on.
The houses in Somerton and the cities around it look a lot like these, and so do the problems. Sun and heat shape the job here far more than rain, so before I say what to add, I look at the gaps, the eave vents and how many inches are already up there.
Working in San Luis: permits, licenses and price
Permits in San Luis go through the city's building safety office, which inspects buildings and job sites in the city, and you can reach them at 928-341-8565. Whether your insulation job needs a permit is their call, so we check with them before work starts, and if one is needed we pull it and set up the inspections, which means your start date waits on that. Before you hire anyone, ask to see their state contractor's license and their city business license, since the city code has a whole chapter on business licenses. We're licensed and insured.
What moves the price is what I find in the attic: its size and how easy it is to get into, whether the old insulation is clean enough to stay, how many gaps need sealing, and whether foam or loose fill makes sense for your house. The schedule turns on the permit, if there is one, and on how much old material has to come out first, and your estimate spells out both after I've looked. We do the same work in Yuma and the cities around it, but every attic gets looked at on its own.
Services in San Luis, AZ
Attic insulation
Attics here sit right over the bedrooms and bake all summer. We measure what's up there, keep the eave vents clear and fill evenly out to the edges.
Spray foam insulation
Ductwork in a San Luis attic sits in the hottest air in the house. In that case we put spray foam insulation on the roofline, so the ducts work in cooler air.
Attic air sealing
Hot rooms often come from gaps around can lights, pipes and the attic hatch. We seal those first, because insulation over an open gap just fights the draft.
Insulation removal
Older attics here often hold insulation that's packed flat or full of droppings. We bag it out first, so the problem doesn't stay under the new layer.
Wall insulation
The room over the garage takes heat from below and above. We insulate its walls and the floor over the garage so it stops running hotter than the house.
Commercial insulation
Property managers call us about San Luis shops and offices with metal roofs that heat up by afternoon. We insulate and seal under the roof so the cooling can keep up.
Get a written insulation estimate for your San Luis home
Send the form and we'll reply within one business day to set a time. I come out to your San Luis house myself, look at the job in person and go over what it needs before I write up the estimate. The estimate is free, with no pressure and no obligation.
- Phone
- (928) 550-6036
- Location
- San Luis, AZ 85349
- Hours
- Mon–Sun: 7 AM–10 PM
- Credentials
- Licensed and insured.
What San Luis homeowners can count on
We're based in San Luis, AZ, and offer 16 insulation services across the 3 service areas with pages on this site. Every job starts with a free on-site estimate.
- Based in
- AZ
- San Luis
- Services
- 16
- Service areas
- 3
- Licensed and insured.
- Free on-site estimates.
- Expect a reply within 1 business day.
Frequently asked questions
Do I need a permit for attic insulation in San Luis, AZ?
That's the city building office's call, so we check with them before any work starts on your house. If a permit is needed, we pull it and set up the inspections, and if you have questions about the city's rules, we'll point you to the right office.
What happens if insulation work starts before a permit in San Luis?
The city charges an investigation fee on top of the permit fee, and it applies even if a permit is never issued. The building official sets that fee by how serious the violation is, starting at $100.00. That's why we check before we start, not after.
Which building codes apply to insulation work in San Luis?
San Luis uses the International Building Code and the International Residential Code, with its own local amendments on top. You can read the city's building regulations yourself, and we work to whatever the building office applies to your job.
What is the best way to insulate an attic in the San Luis heat?
For most houses here, seal the gaps first and then top up with blown-in insulation, loose fill blown through a hose, which costs less than foam and does the job. The weather station at Yuma averaged 76.0°F across the year and 3.28 inches of rain a year from 1991 to 2020, so heat, not moisture, is what your attic fights. If your ductwork runs through the attic, foam on the roofline is usually worth the extra cost, because it keeps the ducts out of that heat.
How much does insulation cost in San Luis?
Your price comes from what's in your attic, and you get a written figure after I've been up there. Size and access, whether the old insulation can stay, how many gaps need sealing, and foam versus loose fill move it the most. I'd rather talk you out of work you don't need than pad the quote.
How long does attic insulation take, and when can we go back inside?
It depends mostly on how much old material has to come out and how much sealing the attic needs, and I'll lay out the plan at the estimate. With loose fill you can usually stay home. With spray foam, you, the kids and the pets stay out until the re-entry time the foam maker sets, which is when it's safe to come back in, and we tell you that time before we start.
Service areas
Call us about your San Luis attic
We pick up any day from 7 AM to 10 PM at (928) 550-6036, or send the form when a call doesn't fit.




