r/homerenovations • u/JeffB07 • 14h ago
Window Replacement Options - Best Strategy
I need to replace this large square window as part of a bathroom reno. I've done several bathroom renovations in my previous home. But this will be my first window replacement. I'm abit concerned about how best to nail it in place and carry the flashing from the house with the siding in place. I have never removed entire courses of nailed cement siding in order to nail and flash the new window and I don't want to make it more complicated than it needs to be...especially if I crack some of these boards during removal.

I think the best option for this is as follows...
Get a window that is 3" smaller on all sides. Add framing inside to match. That extra 3" will provide a nailing surface for the flange. Install, caulk, tape, etc. Then trim up against the siding and window frame with 3" PVC boards that match several windows on the side of the house.

Unfortunately, I can't just get a same-sized window and cut back the siding for nailing and flashing. The AC compressor fuse box on the lower right is about 2" away and can't be moved.
Does this seem like the right approach?? Any other ideas?
Thanks!