115°F+ summers, 160°F attics
Yuma summer highs routinely exceed 110°F. Attic temperatures on those days commonly climb past 160°F. Every watt of cooling the AC produces has to overcome that attic heat before it can reach the living space.
Open-cell and closed-cell spray foam insulation for Yuma homes and businesses. Seals gaps, stops heat transfer and cuts cooling bills in 115°F+ summers. Installed by a roofer with its own ROC C-40 insulation license.
Reviewed by Michael Lines, General Manager, Lines and Lundgreen Roofing and Insulation.
Spray foam is a good insulation anywhere, but in Yuma, it is arguably the best single energy upgrade a homeowner can make. Here is why:
Yuma summer highs routinely exceed 110°F. Attic temperatures on those days commonly climb past 160°F. Every watt of cooling the AC produces has to overcome that attic heat before it can reach the living space.
In a climate like Yuma's, every gap pulls superheated air into your air-conditioned space. Spray foam is the only common insulation that insulates and seals air leaks in a single product.
Vaulted ceilings, exposed rafters, cathedral bays and irregular truss spaces are hard to insulate with traditional batt or blown-in products. Spray foam expands into every cavity it reaches and conforms to the geometry of the space.
Yuma homes use more energy cooling than heating by a wide margin. An insulation upgrade that targets heat gain pays back faster here than nearly anywhere else in the country.
Spray foam comes in two chemistries. They share a name and not much else, and picking the wrong one is a surprisingly common mistake in Yuma County. Here is how they differ:
If you need the highest possible R-value in a limited space, or if you are foaming the underside of a roof deck in a hot climate, closed-cell is usually the answer. If you have a large cavity to fill and budget matters, open-cell often wins on cost per R.
A second decision matters as much as open vs closed, and that's where to put the foam.
Foam is applied to the floor of the attic, directly over the ceiling below. The attic itself stays unconditioned and vents to outside. Works well with existing vented attic designs. Equipment and ductwork in the attic remain outside the thermal envelope and still run hot.
Foam is applied to the underside of the roof deck, bringing the entire attic inside the thermal envelope. The attic runs much cooler, often within 10 to 15°F of the house. Ductwork and HVAC equipment operate in a far friendlier environment. Requires closing off attic ventilation and is a bigger change to the building’s moisture dynamics. Typically a closed-cell application.
For Yuma’s climate, roof deck application in closed-cell foam is often the most impactful choice, especially when HVAC equipment lives in the attic. We walk you through the tradeoffs based on your home’s construction.
A well-installed spray foam retrofit in Yuma frequently produces cooling-bill reductions you can see on the next month’s electric statement. The exact savings depend on your home, the existing insulation, the foam product, the installation location and your usage patterns. We do not promise specific dollar numbers.
What we can say with confidence:
Spray foam is a chemistry product. It is mixed on site, applied under pressure, and has to cure correctly to work as designed. Done wrong, it can off-gas, shrink, pull away from substrates, or fail to reach labeled R-value. Done right, it performs for decades.
Arizona issues a specific license for residential insulation: ROC C-40. Lines and Lundgreen holds that license (ROC C-40 #068260) in our own name. We do not subcontract it. That is unusual for a roofing company in our market. It means the crew on your project is accountable to our licenses, our warranty and our 80+ year reputation.
We pair this with our ROC C-42 (residential roofing) and ROC L-42 (commercial roofing) licenses, which means we can plan a roof replacement and a foam install as a single coordinated project under our own credentials. See our affiliations page.
Spray foam is most efficient to install when the roof deck is accessible. If you are already planning a roof replacement, that is the best single moment to add foam. The attic is easier to reach, any existing deficiencies are visible, and the combined project is usually priced more efficiently than doing the two separately.
For existing roofs in good condition, we install foam without roof work.
Open-cell or closed-cell, new construction or retrofit, residential or commercial. Free written estimate, no obligation.