A most common condition that we find during a Home Inspection, is that exterior wall penetrations haven’t been sealed against water entry. At locations where various appurtenances e.g. water piping, electrical wiring or conduit, gas piping, etc. pass through the wall, the gap around the material needs to be caulk-sealed. It may not be the most important, or the most harmful of condition we find, but it certainly can be harmful and it has the potential to cause water-related damage to the home; if it has already caused any such damage, then it is obviously an important issue. Usually, the corrective action is simple and inexpensive to implement. And, whenever we see these types of deficiencies, it makes us look just a little bit closer for other related issues. So be sure that all exterior wall penetration are well-sealed to keep the water out!