Dormer
A dormer is a structural element of a building that protrudes from the plane of a sloping roof surface. Dormers are used, either in original construction or as later additions, to create usable space in the roof of a building by adding headroom and usually also by enabling addition of windows.
Often conflated with the term "dormer", a dormer window is a window set into the dormer. Like skylights, dormer windows are a source of light and ventilation for top floors, but unlike skylights (which are flush with the roof surface) they also increase the amount of headroom in the room and allow for more usable space.
A blind dormer or false dormer is a dormer that can only be seen from the outside of the house: it is roofed off on the inside, and does not provide any extra space or light. These are often used to make the house appear more impressive.
A dormer is often one of the primary elements of a loft conversion.
Types
The main types of dormer are:
Popularity
Ireland
During the Irish property bubble the popularity of dormers in Ireland soared immensely; they were often fitted to new multi-storey residential homes as well as in smaller houses such as those found in ghost estates. Retrofitting of dormers however remained uncommon.
Disadvantages
Improperly constructed dormers are prone to leaks and give rise to expensive repairs.
See also
References
Retrieved from : http://en.wikipedia.org/wiki/Dormer
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