Window Replacement & More in Cedar Rapids & Marion, IAIf you are building a new home or looking to upgrade your existing home, IDEAL Window & Door Supply offers a variety of door, window and siding options. Older windows and doors aren't as cost effective as newer styles because they weren't built to keep your home heating and cooling inside. New windows and doors will not only improve the look of your home, but will help to keep your heating and cooling bills down. If you are located in the Cedar Rapids/Marion, Iowa are and an Alliant Energy customer, our products will qualify you for their rebate program! Money back in your pocket.