RV Repair: Rubber Roof, rubber roof, maintainence

Question
Sir,
I own a 2004 Dutchmen 26 DBSL Travel Trailer.  After our last trip I noticed the rubber roof at the front of the trailer had bubbled up into two crescent shapes.  Each crescent started at the crest of the roof and arched rearward. Each crescent measured about four inches wide and three feet long.  I was a really hot day (near 100 degrees). When I touch the 'bubbled up' areas it was soft (I suspect it is only filled with air).  When I looked at the roof later that day, after it had cooled off, the areas were not as large.  

I have no leaks in the roof.  I remember being told by the dealer when I purchased the RV that some bubling was normal on hot days.  All other areas of the roof are flat with no noticeable 'bubbles.' What do you recommend doing?  Thank you.

Steven Van Riper

Answer
The dealer is correct. Don't do anything to it. Just keep an eye on it and perform the maintainence suggested in the owners manual.
Don't hesitate to contact me if you notice anything else that concerns you.
Dave

(Please vote for me for "Expert of the Month")   Thanks