Cut the aluminum the same size as the frame. I set our's up so that when I install the window it also overlaps the siding. Lots of sealer between the window and the frame, easier to wipe excess than add later. Replace anything rotted now. Greg After all my worrying I took another look at the window...

Greg - I'm planning on pulling off the 2 full sheets of siding and two smaller pieces the manufacturer cut above and below the window entirely so shouldn't have to cut the ears. It seems that's one of the only benefits to this vertical siding is all the screws are exposed so easy on and off. Actuall...

As to the rot since it got under the bottom plate and to the plywood subfloor (color me shocked I have plywood not OSB) my plan is to trim the bottom plate flush with the next studs past the rot which also happens to be about 1/2 inch from both edges of that sheet of plywood. Replace the whole sheet...

I have a mid 90's Fleetwood with vertical (corrugated?) aluminum siding. I'm replacing a window and surrounding framing since it was rotten down to where the studs touched the bottom plate. I purchased a vinyl window from Lowe's it's listed as new construction and remodel. It has a nailing fin. The ...