Metal strips or sheets used in construction to prevent water from leaking through joints and gaps in roofing or walls.
Plural of 'flashing,' derived from 'flash' (possibly from the rapid, visible quality of light) combined with '-ing,' originally a construction term from the 18th century.
Flashings are the unsung heroes of building—they're barely visible but absolutely essential, and failed flashings are responsible for countless water damage problems that cost homeowners tens of thousands of dollars.
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