Roof Ballast Rocks

Naturally round grey and tan granite.

Roof ballast rocks. Gravel ballasted roofs with sikaplan or sarnafil single ply membranes are conventionally installed. It is however ballasted generally with gravel. Ballasted flat roofs are a popular choice especially for commercial buildings. 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.

A ballasted roof is a roof with something such as rocks or concrete pavers to hold the roofing membrane such as epdm down. This appears to be a form of roof ballast. Additional benefits of ballast on a flat roof. Please visit us to view actual products before placing an order.

Too much gravel can result in a structural issue due to weight. Admittedly one that i have not seen but i haven t been in the desert since i was a kid. 2 roofing ballast no longer meets spec astm d 448. Roofing ballast is usually the little pebbles you see on a flat ish roof.

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. March 11th 2010 at 2 41 pm. Despite the positive qualities associated with a ballasted roof system there are some challenges. Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis.

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. 4 blue round gravel approx. The single ply membrane and other roof components including thermal insulation are loose laid. The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m 2.

The difficulty with a ballasted roof is the issue of water pooling. You can still find houses here in the city with rock roofs. Commercial flat roofs often carry an asphalt roofing system incorporating rocks or stones and are defined as a ballasted roof. A ballasted roof means that the roof membrane is not anchored or adhered in any way to the decking material.

The ballast also helps protect the roofing membrane from damage such as from hail tree branches and ultraviolet light. Personally i dislike them. Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane. Landscaping decorative drainage septic systems roof ballast.

Holes mean roof leaks and roof leaks mean call the roofer. Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a roofer. Products may run larger than description. Ton or 60lbs bags 3 roofing ballast astm d 448.