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2. EMULSION In roofing, a coating consisting of asphalt and fillers suspended in water.
3. BALLAST Weight used to protect single-ply roofs or to prevent blow-off of systems, which are not adhered.
5. BLISTER An enclosed raised spot evident on the surface of a roof. They are mainly caused by the expansion of trapped air, water vapor, moisture or other gases.
7. POLYMER A substance consisting of large molecules that which have been formed from smaller molecules of similar make-up.
9. DECK The base surface to which a roof system is applied.
10. KETTLE Equipment used for heating bitumen to a flowing consistency.
11. DUCT A cylindrical or rectangular 'tube' used to move air from either exhaust or intake.
12. HATCH An opening in a deck; floor or roof. The usual purpose is to provide access from inside the building.
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1. GALVANIZE To coat a metal with zinc by dipping in molten zinc after cleaning.
4. ASPHALT A dark brown to black, highly viscous, hydrocarbon produces from the residue left after the distillation of petroleum, used as a waterproofing agent.
6. EAVE The part of a roof that projects out from the sidewall, or the lower edge of the part of a roof that overhangs a wall.
8. MASTIC A heavy trowel applied bitumen used for flashings or patch work which remains elastic and pliable.
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