Water rushing stream along your walls will damage its paint and material. Therefore, make sure to inspect your walls for water torrents.
Water penetration can happen for two reasons. It can be due to a defective roof installation or because there is a small hole in your roof.
So if you notice discoloration, moisture, stains, water streaks, wet areas, drip lines, or paint peeling on your ceiling or walls, most probably there may be leaking somewhere.
Unfortunately, roof leaks causing the running water on the walls is difficult to identify. Sometimes, roofs in these sections do not discolor. However, if you see rustic wall stains, it is a sign the wall is near a leak.
Quick emergency roof leak repair will reduce wall moisture damage. However, you will need professional wall inspection to reinforce water-infiltrated areas and prevent future water damage.