Boomerweps wrote:
Sheet foam with minimal expanding spray foam on the seams. For foam to show rot it has to be very old or exposed to UV rays. And it has to break down to absorb water.
The foam we pulled out was pretty bad, and a good amount of it was soaked with water. (from an '87, who knows how long it was wet...). The whole RV and roof was bad, hence the gut.
Sheet foam isn't ideal, because one of the roof repairs involved putting in aluminum square tubing beams, with an arched wood beam on top to make the roof slightly bowed (plus, it was super warped and a curve was the only thing we could come up with to take up the slack...)
That's why we were thinking of something soft, like the standard pink roll.... I do prefer the rigidity the sheets would give, though...
