in APP or SBS modified bitumen with smooth
or granulated surface.
Granular surface - helps protect this Asphalt/SBS
Rubber based product against water.
• Modified can last a long time when
installed on a low slope roof with a minimum
• Smooth Modified can be coated with
a white elastometric or other protective
coating every 3 to 7 years to extend its
life will beyond most 10-year warranties.
• Both the GTA & STA have a polyester
mat for increased water resistance.
Most warranties are 10 to 12 year on material
• Degrades very quickly on flat roofs
with standing water (usually within 5 years).
• Left uncoated, modified will degrade
with exposure to the sun, ice & water.
• Most modified is applied with an
open flame or torch (GTA & STA) for
the best adhesion, creating a risk if not
Arvada, Boulder, Broomfield, Castle Rock, Denver, Englewood, Golden, Lakewood,
Littleton, Northglenn, Parker