Gravel Ballast Green Roof

Too much gravel can result in a structural issue due to weight.

Gravel ballast green roof.

It also provides protection from foot traffic. 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. Magazine and roofing southwest although single ply roofs inherently have sun protective qualities ballast provides an extra layer of protection from uv rays.

Roof gravel provides a protective layer to flat roofs reducing the weather damaging effects from uv rays and heavy snow hail and wind. The single ply membrane and other roof components including thermal insulation are loose laid. Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a roofer. For built up roofing the gravel was generally 25 5 inches in diameter.

The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m 2. The gravel in a ballasted roof helps absorb heat preventing the sun from heating the roof materials below and making the roof more energy efficient. Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane. Gravel ballasted roofs with sikaplan or sarnafil single ply membranes are conventionally installed.

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 gravel used in built up roofing what the roofing contractors were used to was not the same as that used in a ballasted roof. Holes mean roof leaks and roof leaks mean call the roofer.