The stone ballast on a ballasted roof system is the only thing holding the roof system in place.
Roofing ballast definition.
1075 2000 lbs.
Gravel broken stone slag etc placed between and under the ties of a railroad to give stability provide drainage and distribute loads.
In roofing ballast comes in the form of large stones or paver systems or light weight interlocking paver systems and is used to provide.
52 5 97 65 kg.
Over time the stones move around creating bald spots where the system isn t held down at all.
The ballast of a steady income.
Gravel or broken stone placed under the ties of a railroad.
2 2 conventional ballasted roof system.
A heavy material carried on a vessel to control draft and stability or a balloon to control altitude.
A device that maintains the current in an electric circuit at a constant value and may also provide the starting voltage as in a fluorescent lamp.
Epdm roof membrane 60 mil ballasted membrane and stone ballast only 10 75 20 lbs.
Stone ballast is no longer allowed by many building codes.
1 the term used for each row of shingles of roofing material that forms the roofing waterproofing or flashing system.
There are no fasteners installed at all 3 and 4.
A material installed over the top of a roof membrane to help hold it in place.
Ballast stone can crush the underlying insulation creating weak spots in the roof membrane.
The insulation is loose laid onto the decking.
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.
Ballasts are loose laid and can consist of aggregate or concrete pavers.
A ballasted roof means that the roof membrane is not anchored or adhered in any way to the decking material.
A roof configuration with a partial cylindrical shape to it.
2 one layer of a series of materials applied to a surface e g a five course wall flashing is composed of three applications of roof cement with one ply of felt or fabric sandwiched between each layer of roof cement.
Epdm roof membrane 60 mil fully adhered membrane only 0 47 lbs.
Fall 2019 crca today 1 5.
Epdm roof membrane 90 mil fully adhered membrane only 0 56 lbs.
It is however ballasted generally with gravel.
In windy areas ballast stone can actually blow off the roof creating projectiles below.
Next the membrane is rolled over the insulation 2.
