Apparently this problem occurs frequently under the "perfect storm" conditions of a cross wind, head wind, and a gust from an on-coming big rig. This picture is of another rig, but exactly shows the problem.
On one of the forums, a description of how Winnebago attaches the roof is as follows:
"The entire roof is held on to the sub-roof structure with adhesive; hence no seams or screw holes on the main roof. The 8 inches or so from where the roof begins to roll down to meet the J-channel is not, that area is filled with molded foam insulation. The end of the roof material is tucked into a slot in the J-channel which is filled with an elastomeric adhesive. Then the area is sealed with another bead of the same elastomeric adhesive.”
In our case, there was no visible caulk or adhesive along the edge where the roof tucks behind the J- channel. At this point I'm not sure insurance will cover it due to the age of our coach, now 15 years old. More to come ....
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