Which all leads to another problem with using those rubber flashings instead of the lead flashings when plumbing vents terminate through roofs: The rubber flashings expose *a lot* (comparatively speaking) of PVC to sunlight while the lead flashings expose *very little* PVC to sunlight.

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Jerry Peck, Construction / Litigation Consultant
Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
www.AskCodeMan.com