I check mine often and after going into any area that has low tree branches. The only leak I had was around a rear window in my slide. They missed the hole when they applied the putty tape while it was being built. I removed that window to reseal and went around all the other windows with proflex. I also sealed around all the clearance lights and used silicone on the plastic lens. You will see clearance lights that fill up with water and then flow through the center hole. Water weeps in and will weep out over time but as the rain is coming down it can flow into the rig through the center hole.