| 摘要 |
An integral one-piece roof flashing for preventing moisture from passing between a vent pipe and a roof. The flashing, preferably of plastic, includes a base having an aperture and a laterally-extending planar flange with a raised center portion. An upstanding outer sleeve is joined to the center portion by a flexible corrugated portion of the flashing. A downwardly-depending inner sleeve has a top end joined to the distal end of the outer sleeve, extends into the outer sleeve, and is adapted for receipt into the top end of the vent pipe. The corrugated portion flexes to allow the outer sleeve to be angled up and down the pitch direction of the roof, side to side, and to extend to accommodate different roof pitch angles and vent pipe heights. A scale on the base allows the vent pipe height to be measured to ensure that it is within acceptable limits.
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