70s era house aluminum siding aluminum framed, dbl pane w/single horizontal slider is existing window.
I will buy a custom sized, flange-less vinyl window to reinstall.
My question is how to remove the existing window frame without mucking up the alum siding. I am down to the exposed 2x4 framing on the interior side, on the exterior, the J-channel is *tight* against the window frame. I can get down to the bare frame easily, the sliding pane lifts right out, the fixed pane comes out by removing a couple of sheet metal screws.
I could probably use my Sawzall to cut the frame out, leaving the existing flange, but that would most likely make a mess out of the J-channel.
I know this has to have been done a gazillion times, how do I do it?