Useful Industry Terms

END LAP

The amount of overlap at the end of one component of material over another.

E.V.T. EQUI-VISCOUS TEMPERATURE

The critical temperature at which asphalt reaches the viscosity most favorable to good adhesion when applied in a BUR.

EXPANSION COEFFICIENT

The amount that a specific material will vary in any one dimension with a change

of temperature.

EXPANSION JOINT

A device used to make up the motion of expansion and contraction. On large roofs this provision for the movement of the materials forming the walls, roof deck and roof covering is usually made by deliberately separating the building into sections, and covering separation between adjacent sections with the expansion joint to allow movement but keep out the weather. Expansion joints, unlike control joints, penetrate through the roof deck.

EXTRUSION

An item formed by forcing a base metal (frequently aluminum) or plastic, at a malleable temperature, through a die to achieve a desired shape.

EYEBROW

A flat, normally concrete, projection which protrudes horizontally from a building wall; Eyebrows are generally located above windows.

FACADE

The decorative front of a building.

FACTORY MUTUAL FM

A major insurance agency who has established stringent guidelines for maximum construction integrity as it relates to fire and environmental hazards.Their specifications have become industry standards.

FASCIA

Any cover board at the edge or eaves of a flat, sloping, or overhanging roof which is placed in a vertical position to protect the edge of the roof assembly.

FASTENERS

A general term covering a wide variety of screws and nails which may be used for mechanically securing various components of a building.