Gravel Ballasted Roof System

There are two main types of burs or tar and gravel roofing systems modified bitumen roofs which are a mix of asphalt and rubber with a layer of gravel on top and ballast roofing which is a different style of larger gravel applied on top of a single ply roofing system.

Gravel ballasted roof system.

The stones used in ballasted roofing are generally 1 5 2 5 inches in diameter and applied in a thicker layer. For built up roofing the gravel was generally 25 5 inches in diameter. However other ballasted systems use pavers which are easier to walk on and can be. For all systems the top layer may be a cover board as follows.

Insulation as an acceptable substrate for gaf roof systems. 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. The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m 2. Fully ballasted application ballast paver has been wind tunnel tested at colorado state university and far exceeds the performance of gravel ballast and other paver systems.

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. A ballasted gravel paved roof will generally require a stronger supporting structure than that for the exposed membrane one but will allow the roof to be used as a trafficked or leisure use area. They are known for their installation speed and pleasing aesthetics. For ballasted systems a minimum of two layers of insulation are required for extended length guarantees.

Holes mean roof leaks and roof leaks mean call the roofer. Although the primary purpose of ballast is to weigh down the roofing materials it also offers similar protective benefits as described above. Most ballasted roof systems use gravel stone that is similar to what would be used in landscaping. Gravel ballasted roofs with sikaplan or sarnafil single ply membranes are conventionally installed.

Roof materials for ballasted green systems. Ballasted green systems. Gravel on a ballast roof system. Ballasted roof systems have been installed since the early 1970 s.

The single ply membrane and other roof components including thermal insulation are loose laid. Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis. 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. Firestone epdm ballasted system application.

Gaf energyguard insulations must be used in roofing systems to be guaranteed by gaf.