Foam roofs are fast becoming the most popular roofing material for flat roofs in Arizona. That is because improvements in manufacturing have made foam roofs cheaper over time.
Foam can be directly applied on top of your existing roof if it is in good enough shape. For new roofs and foam overs the cost can range between $3500 to $15000. If your existing roof needs removed it can add a few thousand dollars more to the cost for removal and dumpster fees.