When you design a house, you can’t leave behind the window design ideas. Windows are not only for decorative elements for a house, but also useful parts of house that enables air changing in a house. Don’t you know that window design comes in many ideas and styles? Some of the window designs are single hung, double hung, sliding windows, picture windows, arch windows, casement windows, awning windows, bay and bow windows and skylight windows. You can choose one which you prefer and suit to your needs.