Spray Foam Roofing in Phoenix, AZ

What drives spray foam roof prices in Phoenix

Typical totals from our price sheet for a 1,500 sq ft flat roof: about $7,125–$9,000 to foam over the existing roof ($4.75–$6 per square foot), or $4,800–$6,300 on new construction ($3.20–$4.20 per square foot). See every range on our pricing page.

Foam pricing comes down to how much area we spray and what condition the existing roof is in. On a Phoenix house we look at:

• Square footage of flat or low-slope area, and how many separate sections there are
• Whether the old built-up or rolled roof is dry enough to foam over, or has wet spots to cut out
• Foam thickness, which sets how much insulation you gain
• Parapets, scuppers and drains that need detailing
• AC units, vents and skylights to flash into the foam
• Elastomeric coating versus a gravel finish

Put your roof into the instant estimator for a ballpark, then have us walk it so we know what's under your feet.

Haver lows, Beadle flats and the additions in between

Marlen Grove, built in 1952 between 10th and 11th Streets near Bethany Home Road, is block homes under low-sloped roofs. Windemere, a 1955 Haver subdivision near 45th Street and Indian School, has low-pitched rooflines. Marion Estates and Paradise Gardens mix flat and pitched sections. On roofs this shallow, water moves slowly, and the seams in old rolled roofing are where leaks start.

Foam takes the seams out of the picture. It cures into a single piece that bonds to whatever is below and wraps up parapets and around penetrations, so it flashes itself. If the existing roof is dry and attached, we can usually spray right over it and skip the tear-off. The foam also insulates, which helps most where there's little attic space between the deck and the rooms below.

The coating is the part you maintain

Bare foam can't take UV. After it cures we roll on an elastomeric coating, or broadcast gravel into it, and that top layer takes the sun. In a summer like 2024, with 113 straight days over 100 degrees, the coating earns its keep. It wears over time and gets recoated, which is maintenance, not a new roof. You can walk a cured foam roof to service the AC.

Foam over metal patio covers and shops

Metal carports, patio covers and shop roofs turn into griddles in a Phoenix July. Foam over metal lowers the surface temperature and seals every screw and lap at the same time. Our first coat over metal-roof foam is a light tan, and the white topcoats follow, so any thin spot stands out on a glaring roof. What happens when you foam a metal roof in Phoenix walks through the temperature at each stage, and our post on how top-side spray foam lowers metal roof temperatures covers the insulation side.

Wondering whether your low-slope roof can take foam without a tear-off? Call (602) 799-6837 and we'll come walk it and tell you what we find, at no charge.

Not every Phoenix roof is flat. For pitched sections, see tile roof work in Phoenix or Phoenix shingle replacement, and for warehouses and offices there's our Phoenix commercial page.