Gravel Ballasted Roof

However other ballasted systems use pavers which are easier to walk on and can be.

Gravel ballasted roof.

A built up roof for example will typically include the built up membrane itself with or without gravel as well as some kind of insulation and cover board which will vary in thickness from roof to roof. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary. They are known for their installation speed and pleasing aesthetics. 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. 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. However bur roofs use small stones embedded in tar or asphalt in order to serve as protection from sun rays whereas ballasted roofs use large loose unembedded gravel in far greater quantities and weight from 10.

On the other hand ballast roofing might be the right choice for your commercial property if you live somewhere with a ready source of ballast rocks gravel of the appropriate size and you prefer the aesthetic look and texture of the larger stones. Ballast tar gravel roofing. Stone ballasted roofs are easy to confuse with bur roofs since the latter are also commonly topped with crushed stone or gravel. Too much gravel can result in a structural issue due to weight.

Holes mean roof leaks and roof leaks mean call the roofer. Ballasted roof systems have been installed since the early 1970 s. Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane. 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. 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. The single ply membrane and other roof components including thermal insulation are loose laid. 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.

Some commercial single ply roofs are ballasted with gravel this report does not apply to these gravel roof advantages most gravel roofs are inexpensive to build offer some protection to vulnerable asphalt against uv damage and the stones are very durable. Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis.