A window is a vented barrier provided in a wall opening to admit light and air into the structure and also to give outside view. Windows also increases the beauty appearance of the building. There are so many types of windows are available based on their positions, materials, and functioning. Windows are classified as Fixed windows, Sliding windows, Pivoted windows, Double-hung windows, Louvered windows, Casement windows, Metal windows, Sash windows, Corner windows, Bay windows, Dormer windows, Clerestory windows, Lantern windows, Gable windows, Ventilators, and Skylights.