Roof covering of the top of a building serving to protect against rain snow sunlight wind and extremes of temperature.
Roof architecture definition.
They were usually set at a slope or pitch so that rainfall could drain off.
Definition of roof span.
Unit rise is a is a snonym for slope or roof slope.
Roof dormers as architectural features are described separately at roof dormer types photo guide readers should see architecture building component id for illustrations of building architectural types shown below are provided courtesy of carson dunlop associates.
Roof terminology is also not rigidly defined.
The vertical change in height per unit of horizontal distance or run.
The characteristics of a roof are dependent upon the purpose of the building that it covers the available roofing materials and the local traditions of construction and wider concepts of architectural design and practic.
A roof is the top covering of a building including all materials and constructions necessary to support it on the walls of the building or on uprights providing protection against rain snow sunlight extremes of temperature and wind.
For example a 3 12 roof has a unit rise of 3 of height increase or rise per 12 of horizontal run or distance.
They can be arched or domed.
A single flat sheet or a complex arrangement of slopes gables and hips.
Roof shapes vary from almost flat to steeply pitched.
Normally a roof span is the same as the building width between the outer edges of the wall top plates.
Roof shapes differ greatly from region to region.
The earliest roofs constructed by man were probably thatched roofs that were made of straw leaves branches or reeds.
The main factors which influence the shape of roofs are the climate and the materials available for roof structure and the outer covering.
Readers should see the additional photo and drawing guides to building architectural styles in the links listed at page top or.
Or truncated to mini.
Roof covering of the top of a building serving to protect against rain snow sunlight wind and extremes of temperature.
Roofs have been constructed in a wide variety of forms flat pitched vaulted domed or in combinations as dictated by technical economic or aesthetic considerations.