A Dormer is a framed space with one or more windows that juts out of a sloped roof.  The introduction of a dormer in a roof adds space in the sub-roof area (e.g., attic) and a visual component to a plain sloped roof.  

The roofing materials for dormers includes shingles, metal panels, shakes and tile.

The presence of a dormer introduces some dormer geometry complexity address in the calculators below.

Dormers

A dormer is a structural element on a roof that projects vertically from the main plane of the roof, creating additional space and usually incorporating a window. Dormers are often used to add natural light, ventilation, and headroom to attic spaces or upper floors of a building. They can also enhance the architectural character of a building.

Key Features of a Dormer:

• Projection: Dormers extend out from the slope of the roof, providing more usable space inside the building.
• Window: Most dormers include a window, which allows light into the room and can offer views outside.
• Roof Type: The roof of a dormer can vary in style, with common types including gabled, hipped, shed, or flat roofs.

Types of Dormers:

1. Gabled Dormer: Features a pitched roof that forms a triangular gable. This is one of the most common dormer styles.
2. Shed Dormer: Has a flat or slightly sloping roof that slopes down in the same direction as the main roof but at a shallower angle.
3. Hipped Dormer: Has a roof with three sloping planes that meet at the top, similar to a hipped roof.
4. Eyebrow Dormer: Has a low, curved roof that resembles the shape of an eyebrow. It's more decorative and offers less space inside.
5. Flat Roof Dormer: Has a flat roof, offering a more modern and minimalist appearance.

Function and Benefits:

• Extra Space: Dormers add headroom and usable floor space to upper levels, making attics or lofts more functional.
• Natural Light: The windows in dormers bring in natural light, which can brighten up otherwise dark spaces.
• Ventilation: Dormer windows can be opened to allow fresh air into the space.
• Aesthetic Appeal: Dormers can add architectural interest and character to a building, enhancing its curb appeal.