Roofs are one of the places that can be highly susceptible to water intrusion for a number of reasons. A roof should have the appropriate amount of slope for water to drain, also the roof's flashings need to be periodically checked for leaks. If gutters and downspouts become clogged this prevents water from draining properly so have them cleaned out regularly, you should also have downspouts positioned for water to drain away from the house.
Over time houses develop cracks and holes in foundations and walls, etc. which can make them susceptible to moisture intrusion. Seal them up as soon as you notice this happening. The home's plumbing system should also be checked for leaking fixtures, dripping pipes, and blocked drains as these are high-risk areas.
High humidity levels are yet another cause of moisture intrusion which often manifests itself with stains on ceilings and walls, musty smelling odors, and poor indoor air quality. When you observe moisture collecting on surfaces in the home, clean and dry them immediately which will help to prevent these issues.
Water intrusion, as we have mentioned, can cause some real problems for your home so make sure that you keep up with regular home maintenance and act quickly to fix any problems you find.