I'm going to be installing nailing fin vinyl windows using a new construction application in a stucco wall. I'd like to install them properly with gasketed and caulked casing bead around the edges to account for the different coefficients of expansion for the stucco and vinyl windows and prevent cracking.
I can get plastic casing bead, but noticed that for a negligibly greater amount of money, I could get painted galvalume metal J-channel and drip caps intended for roofing. Examples:
I quite like this option since the metal is bound to hold up better than plastic. I can also get them in non-white colors which could create a nice contrast between the white window and the white stucco.
Is there any reason why this wouldn't work?