Roof Ballast Definition

Though ballast roofing systems look very similar to built up roofing systems or bur s there are certain differences. 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. In roofing crushed stone crushed slag or water worn gravel used for surfacing for roof covering.

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It is however ballasted generally with gravel.

Roof ballast definition.

Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis. Gaf everguard roof membranes must be used in roofing systems to be guaranteed by gaf. Ballast definition any heavy material carried temporarily or permanently in a vessel to provide desired draft and stability. 1502 1 add a new definition.

Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane. Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a roofer. 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. Adds a lot of weight to the roof system typically 10 15 pounds per square feet.

Everguard tpo ballasted roof systems the selection of membrane type thickness and attachment is the responsibility of the architect engineer owner or roof consultant. Holes mean roof leaks and roof leaks mean call the roofer. A ballasted roof means that the roof membrane is not anchored or adhered in any way to the decking material. The current ballast restrictions are understood to have been highly influenced by historic events including.

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. The following is a list of eligible membranes. Extremely difficult to find a leak in this system since the membrane is well hidden. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary.

Roofs with pavers as ballast can be used as outdoor patios. In roofing ballast comes in the form of large stones or paver systems or light weight. Ballast is any item having weight that is used to hold or steady an object. 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.

Drawbacks of a ballasted roof system. Ballasted roof systems are not really a new concept. 1502 1 add a new definition. Adds restrictions on the application of ballasted roof assemblies.

Ballast stone traps a lot of dirt making patching difficult. They look aesthetically appealing and installation is fast and easy. They were installed on roofs even in the early 1970 s. It is intended as a design and installation reference for those individuals who design specify and install ballasted single ply roofing systems.