When it comes to dormer windows the gable dormer and shed dormer both bring in much needed light and air inside the house. Deciding which of the two to use in your home will depend on where and how you will be using them.
A shed dormer can provide more head room and attic space than a gable dormer. On the other hand, the gable dormer allows more light and air enter the home than the shed dormer. If you want to increase the space in your attic, install a shed dormer but if you want more light to enter your home, go for a gable dormer instead.
Shed dormers can be placed all the way to the edge of the building with their weight supported by the walls. This type of dormer is usually seen in big concrete buildings. On the other hand, gable dormers are usually installed on angled roofs with their weight supported by the roof rafters. This type of dormer is usually seen in country homes.