Cracks & Leaks in roof

I disagree with Donn0128 regarding the visual inspection. I paid for multiple seal teck tests and had mine to two different dealers on five occasions before I accidentally found the leak myself. It turns out that the seal around the shower skylight in the back of the coach didn't seal to the roof properly and water ran underneath it. The water then ran to the front of the motor home and leaked into the area around the drivers seat. I found it by accidentally stepping on the seal around the shower and seeing water squish out from underneath it. Visually it looked fine and pressing on all the seals with my hands didn't cause the water to squirt from underneath the seal. The motor home was under warranty and the roof was visually inspected by the dealers maintenance technicians each time it was brought in and it leaked each time I took it home. Visual inspections are always a good idea but in my experience it's just not that simple.