A material (typically, metal) that is shaped or molded for the location and used at an angle in a roof or wall to prevent rainwater/moisture leakage into the structure.
Merriam-Webster Online Dictionary
flashing (noun) sheet metal used in waterproofing (as at roof valleys or hips or the angle between a chimney and a roof)
flashing (Wikipedia)
| Look up flashing in Wiktionary, the free dictionary. |
Flashing may refer to: