Description : When having windows installed, is it foolish to do have them do it without the flange? They are offereing lifetime warranty on the installation.
Last Answer : A properly installed and flashed flange may help protect against water damage in the future. If It were my home, I would make my decision based on my time horizon for living there. If I didn't see myself ... some reason, I would include the flange. If you will be gone in five years, don't bother.