Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis.
Gravel bakkast roof.
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.
Though primarily confined to built up asphalt roofing systems it can be applied to single ply epdm rubber based membranes as well.
They are known for their installation speed and pleasing aesthetics.
Ballasted roof systems have been installed since the early 1970 s.
Most ballasted roof systems use gravel stone that is similar to what would be used in landscaping.
When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary.
The purpose of stone or gravel ballast on a flat roof.
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.
The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m 2.
Gravel roof disadvantages on the other hand gravel roofs are hot energy inefficient heavy moisture trapping and unstable.
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.
These small stones.
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.
Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a 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 also provides protection from foot traffic.
Roof gravel provides a protective layer to flat roofs reducing the weather damaging effects from uv rays and heavy snow hail and wind.
For built up roofing the gravel was generally 25 5 inches in diameter.
It is not unusual to find a gravel top coat on commercial roofing systems.
However other ballasted systems use pavers which are easier to walk on and can be.
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.
Published by justin on september 19 2019 september 19 2019.
Ballast tar gravel roofing.
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.
