Roofing Ballast Definition

A material installed over the top of a roof membrane to help hold it in place.

Roofing ballast definition.

Epdm roof membrane 60 mil fully adhered membrane only 0 47 lbs. A roof configuration with a partial cylindrical shape to it. In roofing ballast comes in the form of large stones or paver systems or light weight interlocking paver systems and is used to provide. Ballast is used to provide uplift resistance for roofing systems that are not adhered or mechanically attached to the roof deck.

It is however ballasted generally with gravel. Next the membrane is rolled over the insulation 2. 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.

Anything that gives mental moral or political stability or steadiness. 1075 2000 lbs. 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. In windy areas ballast stone can actually blow off the roof creating projectiles below.

Ballasts are loose laid and can consist of aggregate or concrete pavers. 52 5 97 65 kg. 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. Epdm roof membrane 60 mil ballasted membrane and stone ballast only 10 75 20 lbs.

The insulation is loose laid onto the decking. 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. The ballast of a steady income.

Ballast stone can crush the underlying insulation creating weak spots in the roof membrane. Over time the stones move around creating bald spots where the system isn t held down at all. Fall 2019 crca today 1 5. Gravel or broken stone placed under the ties of a railroad.

Epdm roof membrane 90 mil fully adhered membrane only 0 56 lbs. 2 2 conventional ballasted roof system. The stone ballast on a ballasted roof system is the only thing holding the roof system in place. A ballasted roof means that the roof membrane is not anchored or adhered in any way to the decking material.