Pull the old flashing up over the vent pipe and scrape any old caulk and debris off the roof.
Replacing roof flashing vent.
Cover the screws with a waterproof substance such as a silicon seal.
Slip a flat bar under the edge of the vent flashing and pop the nails up photo 1.
Replacing a dry rotted vent pipe flashing since the rubber material that fits around the pipe is susceptible to breaking down from uv sun rays it is only a matter of years until you will need to replace the flashing.
Pry and lift off the flashing.
Replace all rubber boots and replace metal penetration flashing.
Slide the new flashing over the vent pipe and under the shingles above the pipe.
Click the links below to see inside dustin s toolbox ps roofers charge up to 2.
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.
To replace flashing around the vent pipe first remove the shingles covering the flange at the back and sides.
Pull or cut off any nails.
The collar and sleeve looks like the new construction version without the roof flange slides over the plumbing vent pipe and damaged boot flashing.
Replace the shingles and cover the nail heads with roofing cement.
Old flashing may begin to fail before the new roof s lifespan is over.
However there are limited circumstances where a roofer may decide to reuse flashing.
Roof flashing sometimes develops holes often from hailstorms.
On a typical re roofing job where you are replacing an old or underperforming roof it is wise to replace all flashing.
They also make a boot flashing repair version.
Position a new vent pipe flashing over the vent push it down into place and nail where shingles will cover it.
A cap collar slides over the base assembly to completely enclose the vent pipe.
