A 3rd party RV inspection by an NRVIA Certified Inspector has become an essential element of every RV purchase. The roof inspection “on hands and knees” is one of the most vital parts of that inspection, and why the Inspector spends so much time up there. A surprising number of RV problems start on the roof when membranes or roof seals have been improperly installed, damaged, or not regularly maintained.  Roof membranes are a thin layer of rubber material over plywood, and are susceptible to damage or deterioration from improper installation, sunlight UV rays, bird droppings, tree sap, or damage from tree branches. I have even seen small holes in…