[bestgenman]

While walking on the roof, I always step on the bows used to keep the roof in shape and support the weight.  Stepping in between can cause the ceiling material to become dislodged.  Use soft sole shoes for boaters such as Seabago or Topsiders which  protects the surface plus giving grip.  It's easy to identify where the supports bows are located, watch for the rivets that are transverse to the length.