Spray Foam Roofing in Tempe, AZ

What changes the cost of a spray foam roof in Tempe

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.

In Tempe, foam pricing comes down to what's under it and what goes on top of it:

• The existing roof. Rolled roofing or built-up that's dry and still stuck down can stay, and we spray right over it. Saturated or blistered areas come out first.
• Area and thickness. More square footage and a thicker layer mean more material, and more insulation.
• Coating system. Elastomeric coating or gravel, and the number of coats.
• Edges and openings. Parapets, scuppers, cooler or AC stands, skylights, and the spot where the flat roof meets a pitched one.
• Storm repairs. Sections lifted or torn in the October 2025 microburst may need new decking before any foam goes down.

For a quick range, use the instant estimator. A free inspection from us turns it into a real number.

Flat roofs in Broadmor, Campus Homes and Tempe porch enclosures

When Del Webb opened Campus Homes near Clark Park, some of its eight floor plans had flat roofs. Broadmor, between Broadway and Alameda from College to Rural, is known for midcentury homes with broad, low-sloping rooflines and clerestory windows. Add the porches, carports and garages that owners all over Tempe have closed in over the years, and you get a lot of roof that barely slopes.

Low roofs like these leak at the laps. Rolled roofing and built-up systems are layers lapped over one another, and every lap is a place for water to work in when it sits after a storm. Spray foam gets rid of the laps. It's sprayed as a liquid, swells up, and cures into a single closed-cell layer stuck fast to the whole deck. Around vents and pipes it forms its own flashing. A coat of elastomeric goes on last to keep the sun off it.

Often the old roof doesn't have to come off, which spares a small midcentury house the mess of a tear-off. We talk about when a fix beats a full redo in do you really need to replace the whole roof.

How foam stands up to Tempe heat and wind

A foam roof is adhered to the deck across its whole surface, with no loose edges or laps for wind to catch. That counts in a city where the October 2025 microburst sent gusts up to 90 mph between Guadalupe and Elliot.

Heat is the daily test. Foam is insulation, so the room under it runs cooler, and because you can walk on it, an AC service call doesn't tear anything up. The coating takes the UV, and it has to be renewed from time to time. Ignore it and the foam starts to break down, so we check the coating whenever we're up there and tell you when a recoat is coming due.

Metal carports and sheds can be foamed as well; here's more on foam as insulation for sheet-metal roofs.

Water pooling on a flat Tempe roof after every storm is worth a phone call. Big Red Roofing will come take a look for free; the number is (602) 799-6837.

The rest of the house might need Tempe tile underlayment work or a new shingle roof in Tempe, and business owners can see our Tempe commercial roof services.