Sheet material worked into the joints where a roof meets something else — a wall, a chimney, a valley, a vent pipe. Most leaks are flashing failures rather than failures of the shingles around them, so reusing old flashing on a new roof is the saving that comes back as a callback.
Related terms
- Tear-offStripping the old roof back to the deck instead of laying new material over it.
- UnderlaymentA layer that goes between the structure and the finished surface, and which means two different things depending on the trade.
- CallbackA return trip to put right something that was wrong with a finished job.
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