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Glossary of Roofing Terms - Z

Z Bar: A type of metal counterflashing formed in the shape of a "Z" and typically used on stucco or wood-clad walls.

Zinc: A bluish-white, lustrous metallic element that is brittle at room temperature but malleable when heated. It is generally not subject to corrosion. It is used to form a wide variety of alloys including brass, bronze, various solders, and nickel silver; it is used to galvanize iron and steel, and for electric fuses, anodes, and meter cases, and in roofing, gutters, flashings, edge metals and also for various household objects. Atomic number 30; atomic weight 65.37; melting point 419.4 °C; boiling point 907 °C; specific gravity 7.133 (25 °C); valence 2.

Zinc Oxide: A white powder, ZnO, which is insoluble in water and used as an additive in a number of industrial applications. Paints containing zinc oxide are commonly used as anti-corrosive coatings on metal surfaces.

Zoning: The regulation by a municipality of the use of land and buildings in order to direct, control, promote, or restrict development.