Gravel Ballasted Roof System

Although the primary purpose of ballast is to weigh down the roofing materials it also offers similar protective benefits as described above.

Gravel ballasted roof system.

The gravel used in built up roofing what the roofing contractors were used to was not the same as that used in a ballasted roof. Ballast paver used as a perimeter ballast 10 feet minimum guards against gravel scour and protects the roofing system at it s most vulnerable area. Insulation as an acceptable substrate for gaf roof systems. Ballasted green systems.

Firestone epdm ballasted system application. Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a roofer. Ballast is a different style of gravel which is applied to single ply roofing systems. Gravel on a ballast roof system.

They are known for their installation speed and pleasing aesthetics. Ballasted roof systems have been installed since the early 1970 s. For all systems the top layer may be a cover board as follows. The firestone epdm ballasted system is an economical epdm roofing system suitable for a wide variety of buildings it can be applied on any building that can accommodate the extra load of the ballast and where the roof slope does not exceed 10.

Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane. The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m 2. The single ply membrane and other roof components including thermal insulation are loose laid. However other ballasted systems use pavers which are easier to walk on and can be.

Holes mean roof leaks and roof leaks mean call the roofer. The stones used in ballasted roofing are generally 1 5 2 5 inches in diameter and applied in a thicker layer. Roof materials for ballasted green systems. Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis.

Gaf energyguard insulations must be used in roofing systems to be guaranteed by gaf. For ballasted systems a minimum of two layers of insulation are required for extended length guarantees. Gravel ballasted roofs with sikaplan or sarnafil single ply membranes are conventionally installed. Most ballasted roof systems use gravel stone that is similar to what would be used in landscaping.

For built up roofing the gravel was generally 25 5 inches in diameter.