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Waterproofing Pipe PenetrationsPipe penetrations are often placed by the plumbing and electrical contractors in such a manner that it is impossible to properly install the required flashings.
If using the option of turning the soft metal flashing down into the pipe, the possibility exists that the metal may split due to pipe expansion and contraction and/or building/roof deck settlement.
This detail is suitable for flashing round pipes used to support equipment, electrical conduit, water and gas lines, sheet metal vent flues, plumbing soil pipe vents and other similar penetration.
Continuous cleats are recommended when flashing face dimension exceeds 3 inches and in areas
deemed high-wind zone as categorized by local building code.
The profile of specific components, their configuration or sequencing, can vary with the roof system, climatic differences, and regional or area practices.
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