Liquid applied membrane system over 2.5" foam board. Fantastic roof! Some of the benefits: *White, 87% reflective, keeping the roof surface cool and a/c working less. *Fully adhered, custom built membrane. Not adhered with glue like the old system that often breaks down over time, but directly adhered to the substrate. *Added significant insulation value with the foam board, a big deal in the heat of Utah's desert! *Renewable system. When the top coat starts to wear through, we can simply wash and recoat!