What is a Dormer? A framed window unit projecting through the sloping plane of a roof. A dormer on a roof is a framed window unit projecting through the sloping plane of a roof.
![GBAD Full Color.png]](https://help.gibraltarbuildingproducts.com/hs-fs/hubfs/GBAD%20Full%20Color.png?height=40&name=GBAD%20Full%20Color.png){kind=small}