Did you know that the highest energy efficient roofing material available (over 500% greater than tar & gravel) is foam roofing? Foam roofs are extremely durable with high tensile and compressive strength. Through out the Bay Area, many homes were designed using flat roofs to create their unique look. Maintaining a flat roof is much more difficult than standard pitched roofing. If you are looking for an alternative to tar and gravel roofs that actually incorporates insulation and roofing into one material, then foam roofing is the solution for you.
Most people see pictures of foam roofing and think that the material is soft and fluffy. Foam roofs are anything but soft. It is more like walking on concrete. You can walk on these roofs without the worry of creating a leak. These roofs are made to withstand construction traffic as well without damaging the surface.