You can’t treat a problem if you are not even aware that you HAVE a problem, right? Similarly, it is important to know that you have a foundation problem before trying to solve it.
There is no doubt that salty coastal air damages the exterior of your house. This does not mean that you let go of a beautiful house. The key is to be prepared and ready for what can happen.
There is no exact answer to the question of how long before the exterior of a house needs a paint touchup or a repaint. The decision depends on some fundamental variables.