One of the most devastating forces of nature to a homeowner is water. We go to great lengths to make sure water stays where it is supposed to in, out, on and around the home. Why, then, are so many leaky roofs commonplace? One reasons is improperly installed roof components such as a plumbing boot.The plumbing boot allows for sewer gas vent pipes to exit the home and penetrate the roof surface. Improper installation leads to costly water damage. In the attached picture, you can see multiple installation concerns. First, the actual protective rubber boot around the pipe is deteriorated and the selected fix was to apply caulk which will eventually dry and crack and allow water penetration into the roof/attic space. Secondly, the flashing portion should be tucked under as many shingles as possible and should only be exposed at the very bottom. There are two more rows of shingles this boot flashing could be installed under. They have applied sealant around the perimeter of the boot flashing which will eventually dry out and crack allowing for water to penetrate the roof and attic space causing water damage.