I would question that dry rot is "so very common" as most of the instances brought to light on RV forums relate to unnoticed long-term leaks. If dry rot was 'very common' I would expect every RV would suffer from it? At what age would you expect this to become evident, or of consequence?
Joe
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2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired
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