Gravel Ballast Green Roof

Ballasted green systems roof materials for ballasted green systems 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.

Gravel ballast green roof.

Despite the positive qualities associated with a ballasted roof system there are some challenges. Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a roofer. The single ply membrane and other roof components including thermal insulation are loose laid. For built up roofing the gravel was generally 25 5 inches in diameter.

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. It also provides protection from foot traffic. The stones used in ballasted roofing are generally 1 5 2 5 inches in diameter and applied in a thicker layer. Our roof gravel is available for delivery in tunnel lift bulk bags allowing an easy method of transporting the gravel onto a roof using a crane not provided.

The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m 2. Roof gravel provides a protective layer to flat roofs reducing the weather damaging effects from uv rays and heavy snow hail and wind. Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane. Holes mean roof leaks and roof leaks mean call the roofer.

Magazine and roofing southwest although single ply roofs inherently have sun protective qualities ballast provides an extra layer of protection from uv rays. It is very important to note that the amount of gravel being applied to a roof must be precise it depends on the specific roofing spec being used and the building type. Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis.