Replacing Roof Flashing Vent

The home mender shows how to replace a broken pipe collar on a shingle roof.

Replacing roof flashing vent.

A cap collar slides over the base assembly to completely enclose the vent pipe. Replace all rubber boots and replace metal penetration flashing. However there are limited circumstances where a roofer may decide to reuse flashing. Slip a flat bar under the edge of the vent flashing and pop the nails up photo 1.

Roof flashing sometimes develops holes often from hailstorms. To replace flashing around the vent pipe first remove the shingles covering the flange at the back and sides. Old flashing may begin to fail before the new roof s lifespan is over. Pull the old flashing up over the vent pipe and scrape any old caulk and debris off the roof.

Position a new vent pipe flashing over the vent push it down into place and nail where shingles will cover it. Click the links below to see inside dustin s toolbox ps roofers charge up to 2. Pry and lift off the flashing. Pull or cut off any nails.

Plumbing vent pipes that extend through the roof come with metal flashing or rubber boot type flashing to seal the penetrations. Figuring that the rubber collar on the new flashing may split before it s time to strip and replace the roof shingles another 20 years hopefully i first seal the vent pipe to the metal of existing flashing with protectowrap s form flash 2 flashing tape. If you find a hole simply cut a patch from an extra piece of flashing and thoroughly clean and smooth the area around the hole. When you reach the vent pipe you then insert a vent pipe flashing and continue adding shingles around and above it as normal.

They also make a boot flashing repair version. On a typical re roofing job where you are replacing an old or underperforming roof it is wise to replace all flashing. Slide the new flashing over the vent pipe and under the shingles above the pipe. Cover the screws with a waterproof substance such as a silicon seal.