I had a 2nd story brick wall replaced and since it sits on a roof the
roof flashing next to it was affected. The mason was careful and able
to save the roof flashing but the overflashing from the brick wall
which covers the roof flashing was lost and needed replacement.
So I had a roofer replace the overflashing. Now here's the problem.
The original flashing is aluminum and I expected him to use aluminum
(we showed him the day before what he was supposed to replace) but
without consulting me he used galvanized which is of course better
under normal circumstances. However now we have galvanized
overflashing protecting aluminum flashing and I am concerned about
dissimilar metals touching each other in a wet application. Anyone
know if my concern is valid?