The first reason is to allow more sunlight to enter. However, adding dormers can make this apartment feel more open and full of light if you have a bedroom or a garret on your highest floor.
A dormer is a window that is usually set up vertically on a sloping roof. Dormers have their own roof, which can be flat, arched, hipped, pointed, or ornate. Dormer windows can be erected on the ceiling or wall and come in a number of shapes and sizes.
