aluminum sill pans?
I'm having replacement windows put in (Marvin Ultimate Clad casements). The installer is making aluminum sill pans onsite. They are installed in the RO with upturned sides. The window is set directly on top of the sill pan. The back edge is up turned (to prevent water from potentially running back towards the inside of the house). We are in a cold climate (Chicago) and now am wondering mid install if the aluminum is going to cause problems with condensation. The back lip of the pan touches the botton of the interior wood of the window (it will be covered by the interior window trim). I googled lots tonight and see many articles about people making metal sill pans on site, but nothing addressing if this could make me regret this approach.