Guide · the bill

Foam roof cooling savings in Phoenix

White, reflective and R-6.5–7 per inch: a foam roof attacks the two things that make a Phoenix cooling bill — radiant heat on the roof and conduction through it. Here's the math in dollars, with the assumptions shown.

Call (602) 875-0334 Text a photo Email a quote requestMon–Sat 7am–6pm · storm-week hours extended

YOUR AVERAGE FOAM ROOF — foam for insulation and slope, a thin top coat for the sun. The coat (peeled back here) is the part that wears out, and the part that is cheap to renew.
Note: additional layers not shown for simplicity / difference in roof systems.

Cooling-bill calculator APS / SRP summer

Durafoam reports a 15–35% drop in cooling costs after switching from tile or shingle to foam. Put in a summer bill and pick where you think your home lands.

Average summer electric bill ($/month) Cooling reduction: 20%

Assumes cooling is ~60% of a Phoenix summer bill (APS and SRP both put summer cooling between half and two-thirds of usage). Savings vary with attic insulation, duct condition and the roof you're replacing. Recoating an existing foam roof restores reflectivity but does not add the full step-change.

Where the number comes from

15–35% drop in cooling costs after switching from tile or shingle to foam — Durafoam's published range for Phoenix homeowners.
Cooling is 50–65% of a Phoenix summer bill — APS and SRP both describe cooling as the largest share of summer usage; the calculator uses 60%.
Recoating restores reflectivity on an existing foam roof but doesn't deliver the whole step-change; that came with the foam.

What else moves the bill

Attic insulation level (R-38 is the Phoenix target), duct leakage, shade screens and the age of the AC. A foam roof on a house with R-11 attic insulation and leaky ducts still helps, but the insulation top-up is the cheaper first dollar. Cross-reference: Home Efficiency Guy.

Questions people ask

How much does a foam roof save on cooling in Phoenix?

Valley installers report 15–35% lower cooling costs versus tile or shingle. On a $320 summer bill with cooling at 60%, that's roughly $30–$65 a month in summer.

Does recoating a foam roof lower my electric bill?

It restores the white coat's reflectivity, which a chalked grey coat has lost — a modest, real improvement. The large saving came when the foam was installed.

Three ways to reach a licensed foam rooferSame contractor either way. Texting a photo of the leak or the roof is the fastest way to get a ballpark.

Call(602) 875-0334Mon–Sat 7am–6pm · storm-week hours extended Text a photo(602) 875-0334Snap the leak or the roof; reply comes by text Email a quote requestFive fields, written quoteA roofer calls back to book the roof walk

LAST REVIEWED 2026-11-01 · Prices on this site are published Valley rates and estimates, not a quote.