T&T: Aluminum fuel talks

[Rudy and Jill]

 Then I took some spray foam and
> filled the gap between the tank and the support. I seal the
> space, waited for it to dry up, then removed the blocks that
> were holding temporarily and filled this space with spray
> foam. 

Foaming tanks in place has been a common approach in boats for years, and unfortunately, it is being discovered, now that they have been in long enough, that the foam does not keep moisture off of the tank as well as it needs to.

I'm sorry to have to disagree, but time has proven that this approach is not as good in reality as it seems to be in theory.

In the past couple years, I know of at least 10 boats, who had to have their aluminum tanks removed because of moisture caused holes. In addition, the foam is, in the long run, bad for the wood also.

Rudy
Briney Bug, Panama City, Fl