Help CenterA VELUX roof window is a specific skylight designed for an installation that's within reach. The roof window's sash can pivot to clean the exterior pane of the glass from inside. Additionally, some larger roof window models meet building code requirements for egress (emergency escape).
Often, roof windows are installed in attics that are used as living spaces. Skylights, on the other hand, are usually installed in "out-of-reach" applications.