Vent pipe flashing on older roofs are metal collars that go on pipes that protrude through the roof. For newer roofs, vent pipe flashing makes use of a flexible rubber gasket attached to the aluminum base sheet.
Roofers that perform roof repairs in Palo Alto can also weather proof your home with the right flashing. This can prevent emergency roof repairs and reduce the risk of a leak. Flashings are the most technical aspect of roofing in most cases and should only be entrusted to a roofing professional.