Though ballast roofing systems look very similar to built up roofing systems or bur s there are certain differences.
Roof ballast definition.
For ballasted single ply roofing systems approved august 5 2013 page 2 1 0 introduction this standard provides a method of designing wind uplift resistance of ballasted single ply roofing systems.
They look aesthetically appealing and installation is fast and easy.
A ballasted roof means that the roof membrane is not anchored or adhered in any way to the decking material.
In roofing ballast comes in the form of large stones or paver systems or light weight.
1502 1 add a new definition.
They were installed on roofs even in the early 1970 s.
Ballast stone traps a lot of dirt making patching difficult.
The following is a list of eligible membranes.
Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis.
Extremely difficult to find a leak in this system since the membrane is well hidden.
Ballast definition any heavy material carried temporarily or permanently in a vessel to provide desired draft and stability.
It is intended as a design and installation reference for those individuals who design specify and install ballasted single ply roofing systems.
Roofs with pavers as ballast can be used as outdoor patios.
1502 1 add a new definition.
It is however ballasted generally with gravel.
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.
Ballasted roof systems are not really a new concept.
Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a roofer.
To look at it another way the ibc is a cookbook that must be followed and ansi spri rp 4 is a single recipe included within that book for ballasted roofing specifically.
Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane.
Adds restrictions on the application of ballasted roof assemblies.
Ballast is any item having weight that is used to hold or steady an object.
In roofing crushed stone crushed slag or water worn gravel used for surfacing for roof covering.
Holes mean roof leaks and roof leaks mean call the roofer.
Gaf everguard roof membranes must be used in roofing systems to be guaranteed by gaf.
The current ballast restrictions are understood to have been highly influenced by historic events including.
Adds a lot of weight to the roof system typically 10 15 pounds per square feet.
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.
