How To Replace A Roof Vent Flashing

In simplest terms a new vent pipe boot flashing is slid over the top of the existing one and the top edge of the pan is lapped beneath the overlying shingle course.

How to replace a roof vent flashing. Over time the flashing around plumbing vents can rust or deteriorate and it will need to be replaced. 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. See other blogs for a proprietary vent flashing repair kit and a repair using a boot flashing with the roof pan trimmed off. To replace flashing around the vent pipe first remove the shingles covering the flange at the back and sides.

Plumbing vent pipes that extend through the roof come with metal flashing or rubber boot type flashing to seal the penetrations. Be sure to like and subscribe in order to help me bring you more helpful videos filled with tips and tricks i ve learned over the years. The flashing is located at intersection points on your roof in spots such as peaks and valleys where water is likely to collect and pool. Pull or cut off any nails.

The metal or rubber flashing around plumbing vents can deteriorate or rust through over time creating water leaks. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. It can be made of galvanized steel copper aluminum or even vinyl you will find it under the shingles running along the peak of a roof but also around chimneys vent pipes and skylights. The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak.

Remove one or two shingles above the vent flashing then pry out the vent being careful not to damage the shingles. Pry and lift off the flashing. Replace the shingles and cover the nail heads with roofing cement. When you reach the vent pipe you then insert a vent pipe flashing and continue adding shingles around and above it as normal.

I ve used this repair on several roofs over the years. Replace all rubber boots and replace metal penetration flashing. The main reason homeowners choose to install or replace the vent pipe flashing on their roof is to stop or prevent leaks which may also help extend the lifespan of the roof. Position a new vent pipe flashing over the vent push it down into place and nail where shingles will cover it.