A double hung window, with two sashes that both tilt and move up or down, is the perfect way to maximize space in a room.  Unlike single-hung windows, which can be difficult to operate because only one of their sashes tilts while the other remains fixed at 90 degrees—making rooms feel more open but also less private. As your windows age, they may become drafty and uncomfortable. If this is the case in any part of your house, you should consider window replacement those old windows with new ones! You can contact Real Exteriors directly to coordinate your window installation. They will help you with every step of the process so that your new windows are installed as smoothly and efficiently as possible!