pianotuna wrote:
one piece fiberglass roof goes a long way to a zero leak situation.
Look at a used Boler for example. They are a bit smaller than you want--but it may give you and idea of what may be possible.
Water intrusion isn't confined to just the roof. On the contrary. Water intrusion can occur anywhere the outer skin (Filon or Aluminum) is breached. That includes but is not limited to furnaces, HWH's windows and power ports. They all have leading edges where water pounds under pressure driving down the road. Roof seals are important but so is any place the outer skin is breached. One reason I'd never have outside speakers on any RV. Their very design causes them to be leakers.
I't don't matter what the frame is constructed from either, though aluminum is a bit better than wood but soaked insulation, mold and ruined inter walls all happen no matter what the structure is made from.
The primary leak points are always forward facing seams and breaches in the skin.
