Roof windows are specially designed openings in a roof that allow natural light and fresh air into a building. They are typically installed at an angle and can be opened for ventilation. Roof windows are commonly used in attics, lofts, and other spaces where traditional vertical windows are not feasible. These windows come in various styles and sizes, often made of glass and framed with materials like wood or PVC. They can enhance the aesthetic appeal of a room while also improving energy efficiency by reducing the need for artificial lighting. Roof windows are also known as skylights when they are fixed and do not open.