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 or loft spaces, transforming these areas into usable rooms. These windows come in various styles and sizes, often made from materials like wood or PVC. Popular brands, such as Velux, offer energy-efficient options that help maintain indoor temperatures. Roof windows not only enhance the aesthetic appeal of a space but also improve its overall functionality.