Fully Ballasted Roof

It is however ballasted generally with gravel.

Fully ballasted roof.

Built up roofs are designed to be fully adhered to the underlying roof matrix either the roof deck or insulation that is above the roof deck. For the headaches involved with ballasted roof systems consider a mechanically attached or fully adhered roof system. A ballasted roof means that the roof membrane is not anchored or adhered in any way to the decking material. Although a ballasted epdm fully adhered roof comes really close.

A ballasted roof also helps protect the epdm membranes from punctures from tree branches. When the concept first came to the u s plenty of roofers scratched their heads and wondered how the roof stayed on without being anchored especially during high winds or storms. The ballasted system ballasted systems the workhorse of the three epdm roofing systems account for approximately 35 percent of epdm installations today. It can perform well in high winds if it is adequately embedded into the asphalt matrix or is on a roof with a high parapet.

Holes mean roof leaks and roof leaks mean call the roofer. The stone used for single ply ballast has been sized using astm d448. Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane. Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis.

In other states like massachusetts ballast roof systems are illegal in certain towns because of the additional weight it adds to the building.