How do dormers work




















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Max bedrooms Studio 1 2 3 4 5 6 7 No max. Find properties. Include new homes. Include properties under offer and contracts exchanged. Long let. Like cosmetic cupolas that sit without function atop a roof, the false dormer is a growing trend, especially in new commercial real estate. In an attempt to mimic a certain hometown colonial style of architecture, dormer units are attached to the roof without breaking through the roof.

False dormers may be out of proportion—either too large or too small—and look unnatural. The artificiality of planned communities like Celebration, Florida is due, in part, to this type of fake architectural detail.

The word "dormer" comes from the same root as the word "dormitory," both coming from the Latin word dormitorium, which means "a place for sleeping. Original dormers may have been built into an older large home to accommodate live-in domestic workers. Besides extra sleeping quarters, the additional interior space created by a dormer took a different turn with the invention of indoor plumbing. Bathrooms require headspace for standing, and a dormer allows this height to be added above a toilet, sink, or bathtub.

This allows an attic space to have a bathroom for a primary suite or as an additional bathroom for the house. Many real estate associations, including the National Association of Home Builders, have classified the term "Master Bedroom" or "Master Suite" as discriminatory. The amount of light and ventilation afforded by a dormer is a function of the imagination. The windows can match the other windows of the house, or you may make the dormer window fancier, such as with colored glass or a non-traditional shape.

The windows may be fixed or they can be designed to open to allow for ventilation. Dormers were especially popular in the s Cape Cod style home designs of America's midcentury building boom. There is nothing fancy with these additions—simple gable roof dormers functioned to add light, air, space, and symmetry to the American home. A gable roof is formed by two sloping sections meeting at the top ridge, forming a triangular shape for the top of window wall of the dormer. The walls of the dormer that extend downward from the gable roof are vertical.

After the gable roof dormer, probably the second most popular roof shape is the shed dormer. Often taking a pitch similar to the roof of the house, the shed dormer can accommodate small or large windows in a narrow or elongated width.

Shed dormers are very common in Craftsman style homes and bungalows. Perhaps the most common type of shed dormer is the one extending nearly the full width of a house. In the front or back, this type of shed dormer extends interior space without adding to the footprint of the building.

It has been very popular since the s to the present. An extension of the shed roof dormer is the flat roof dormer. In this modern building in Germany, you can see that dormers are hardly an old-fashioned idea. Postmodern architects often take traditional architectural details and turn them on their heads. The hipped roof dormer is slightly less popular than gable and shed dormers, but it's more elegant. It often mimics the hipped roof of the house itself. A hipped roof has four sloping sides that come together in a peak, rather than a gable which has just two sloping sides.

For centuries, the playful British have incorporated small arched windows into their cottage architecture. As these windows enable more light than space to enter interiors, eyebrow windows are often considered more of a window than a dormer. The glazed slits can become very narrow and visually seductive. Dormers are common features of Second Empire style homes. The French architect had invented what became known as the Mansard roof, a popular roof style.

The windows breaking through the Mansard roof are some of the earliest examples of dormer windows. Even a more modern building with a Mansard roof likely will have dormers—sometimes both wall dormers through the cornice and roof dormers.

The elegant and regal Biltmore Estate in Asheville, North Carolina exemplifies the 19th-century Mansard roof dormer on a Chateauesque style large home. Most dormers are roof dormer windows—that is, the structure's roof surrounds the dormer as if it were a skylight.

Accounting for snow loads in certain climates, constructing roof dormers is relatively straightforward in both original design and renovations. Lucarnes—tall, narrow roofed projections—were often found on the tall spires of Gothic Cathedrals. They were designed to promote fresh airflow through the tops of the spires, which could get quite hot during summer months. The style of a dormer window is defined by the style of the roof above the window.

A house with a gable roof can have a gambrel dormer, a shed dormer, or another style, depending on architectural preference. The type of roofing material on a dormer window typically matches the roofing material on the main roof. If the main roof has asphalt shingles, for example, the roof over the dormer window likely will as well. Dormer windows are desirable not just for bringing in natural light but also for their exterior aesthetic appeal.

Sheathing the plywood that covers the framing studs is attached to the outside dormer walls and over the rafters of the main roof at the same time. The next step is the installation of a vapor barrier wrap over the sheathing on the vertical walls of the dormer.



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