Rubber Roof Replacement

dougrainer wrote:

Thermoguy wrote:
I'm surprised how many RV's I see headed down the road with a big bubble of roof in the front. Seems like a more than typical problem. I would think an inspection (for caulking, etc) you would see stretch marks and wonder why it looks that way. More people need to look at their roofs.

Believe it or not, but doing an inspection on a roof will rarely show WHERE the air is coming in. You will see the result of air billowing, but a direct visual cause is rare, unless the rubber has actually pulled out of the front cap sealed aluminum strip. I have had air coming in thru clearance lights in the front cap and on the top front side clearance lights and also from below by the hitch area. Doug

You don't need any air coming in for a roof membrane to balloon up, it's uplift from the air moving over it at speed, the same that happens with high winds sucking a roof off a house, which is not caused by the wind blowing in the windows and doors, although that would help it along. It's the same principle that lifts a 737 off the ground. Its not the the air under the wing pushing it up but the pressure differential between below and above the wing.