The most important thing to remember when you replace your windows its to make sure to take exact measurements and to customize the new window pane to the exact size. The installation must be done on the same day of the demolition. You never want to keep your house without window for more than the couple hours of the installation. Carolyn B. had leaks through three of her windows and we changed them to new Vinyl windows with a high insolation factor courtesy of Milgard. A brand with great warranty.