A roof edge that extends out past the exterior wall line.

Another name for Gutter.

Roofing material used to seal perimeter edge metal and the roof itself.

The installation of vent material along a roof edge (e.g., Starter Vent) as part of a ventilation system. Edge vent material should be used in conjunction with other venting material (e.g., ridge vent) as it not intended for use by itself

(Ethylene Propylene Diene Monomer) a type of synthetic rubber, is an elastomer which is characterized by a wide range of applications. The E refers to Ethylene, P to Propylene, D to diene and M refers to its classification in ASTM standard D-1418. The “M” class includes rubbers having a saturated chain of the polymethylene type.

A material which, after being stretched, will return to its original shape.

Properties of a material that will permit it to return to its original shape after being stretched.

A coating that can be stretched to twice its dimensions and that will return to original when tension is released.

The ability of a material to be stretched or lengthened.

In roofing, to uniformly press one material into another, such as aggregate into bitumen, roofing felt into bitumen, or granules into a coating.

Fine particles suspended in a liquid solution. See also Asphalt Emulsion and Bituminous Emulsion.

The extension of one component of material past the end of an adjacent piece of material.

A continuous seal for preventing bitumen from leaking down into or off a building. Is constructed by extending the base sheet or other non-porous ply of felt beyond the edge of the field plies. It is then turned back onto the top of the system and adhered. See also Bitumen-Stop.

A cleat designed to handle thermal movement of the metal roof panels.

A synthetic rubber material similar to EPDM with a stronger resistance to animal fats and oils than EPDM.

A type of synthetic, thermosetting resins that produce tough, hard, chemical-resistant coatings and adhesives.

A nonstructural wall or screen constructed around rooftop equipment such as HVAC units, curbs, etc. to hide the look of the equipment and make the structure more aesthetically pleasing.

The temperature at which a bitumen attains the proper viscosity for use in built-up roofing. There is usually a twenty-five degree Fahrenheit (25° F) variance permitted above and below the recommended EVT. The EVT is measured in application equipment just prior to application using a standard thermometer or it can be measured just after application using a laser thermometer.

A thermoplastic rubber with high tear strength that can be cross-linked by both peroxides and sulfur.

(Equiviscous Temperature) A measure of viscosity used in the tar industry, equal to the temperature in degrees Celsius at which the viscosity of tar is 50 seconds as measured in a standard tar efflux viscometer. Abbreviated EVT.

A device used to vent air from the roof cavity with vents that are installed on or near the higher portions of the roof such as the ridge.

A built-in separation between building sections to allow for free movement between the sections without damaging the buildings structural components.

A method of installing roll roofing materials to where all nails/fasteners are visible and exposed to the elements.

A method of installing roll roofing materials to where all nails/fasteners are visible and exposed to the elements.

The process of manufacturing and/or shaping a material by forcing it through a die.