26 September 2006
Reroofing. Replacement or re-cover of an existing roof system.
Retrofit. The modification of an existing building or facility to include new systems or
Ridge. Highest point on the roof of the building, a horizontal line running the length of
Ridge Cap. A transition of the roofing materials along the ridge of a roof. Sometimes
called ridge roll or ridge flashing.
Roll Goods. A general term applied to rubber and plastic sheeting, usually furnished in
Roll Roofing. Coated felts, either smooth or mineral surfaced.
Roof Curb. An accessory used to mount and level units (such as air conditioning and
exhaust fans) on the sloped portion of the building roof.
Roof Jack. An accessory used to cover pipes (such as vents or flues) that penetrate
the roof covering.
Roof Seamer. Machine that crimps panels together or that welds laps of E/P systems
using heat, solvent or dielectric energy.
Roof Slope. The angle a roof surface makes with the horizontal, measured in a ratio
such as :12.
ROOFER Engineered Management System (EMS). The ROOFER EMS is a practical
decision-making tool to help manage an installations or bases low-slope membrane and
asphalt shingle roofing assets. It includes procedures for collecting inventory and
inspection information, evaluating roof condition, identifying repair/replacement
strategies, prioritizing projects, and developing work plans. Micro ROOFER, a
microcomputer application provides data storage and analysis, and generates
Roofing System. A combination of interacting components designed to weatherproof,
and normally to insulate, a building's top surface; does not include the roof deck.
Rubber. A material capable of quickly recovering from large deformations, normally
insoluble in boiling solvent such as benzene, methyl ethyl ketone, and ethanol toluene
azeotrope. A rubber in its modified state retracts within 1 mm to less than 1.5 times its
original length after being stretched to twice its length.
Sacrificial Protection. Reducing the extent of corrosion of a metal in an electrolyte by
coupling it to another metal that is electrochemically more active in the environment,
i.e., galvanic protection.