METAL EDGE

Brake metal or metal extrusions which are secured at the perimeter of BURM to

form a weathertight seal.

MIL THICKNESS

Measurement used to determine thickness of a coating. 1 mil = .001 inch (1/1000).

MINERAL SPIRITS

A by-product of petroleum, clear in color, a solvent for asphaltic coatings.

MINERAL SURFACED

A heavy roofing felt that has very small granules embedded across its surface.

MODIFIED BITUMEN

Bitumen modified by special processing, generally with the addition of SBS type

rubber or atactic polypylenes (APP). Some are non-reinforced, while others are

reinforced with polyester, polyvinyl acetate, fiberglass, polypropylene or aluminum

foil.

MONITOR, SAW-TOOTH

A type of monitor characterized by sharp angled pitches and vertical sections,

usually arranged in rows much like teeth of a saw.

MONITOR

A large structure rising above the surrounding roof planes, designed to give light

and/or ventilation to the building interior.

MOPPING

A layer of hot bitumen mopped between plies of roofing felt.

MOPPING, FULL
The application of bitumen by mopping in such a manner that the surface being
mopped is entirely coated with a reasonably uniform coating