Click the links below to see inside dustin s toolbox ps roofers charge up to 2.
Replacing roof flashing vent.
To replace flashing around the vent pipe first remove the shingles covering the flange at the back and sides.
Replace the shingles and cover the nail heads with roofing cement.
Plumbing vent pipes that extend through the roof come with metal flashing or rubber boot type flashing to seal the penetrations.
However there are limited circumstances where a roofer may decide to reuse flashing.
Roof flashing sometimes develops holes often from hailstorms.
Position a new vent pipe flashing over the vent push it down into place and nail where shingles will cover it.
When you reach the vent pipe you then insert a vent pipe flashing and continue adding shingles around and above it as normal.
Replace all rubber boots and replace metal penetration flashing.
Pull the old flashing up over the vent pipe and scrape any old caulk and debris off the roof.
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.
On a typical re roofing job where you are replacing an old or underperforming roof it is wise to replace all flashing.
Pull or cut off any nails.
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.
The collar and sleeve looks like the new construction version without the roof flange slides over the plumbing vent pipe and damaged boot flashing.
Cover the screws with a waterproof substance such as a silicon seal.
They also make a boot flashing repair version.
Slide the new flashing over the vent pipe and under the shingles above the pipe.
A cap collar slides over the base assembly to completely enclose the vent pipe.
