Pitch The pitch of a roof is the degree of the inclination upward from horizontal or flat.
Breakpitch - A definite change in the pitch of a roof. Breezeblock - Concrete block perforated in a decorative pattern; often used as screen wall in the 1950s and 1960s.
A dormer window therefore in the proper sense of the word, is a window built off the wallhead, but the term is used to describe any window projecting from the pitch of a roof.
See also: Pitch, Glazing, Fixed, Finish, Bow
 
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