Prime function - Walls.

Monday, January 3, 2011

The prime function of an external wall is to provide shelter against wind, rain and the daily and seasonal variations of outside temperature normal to its location, for reasonable indoor comfort. The basic function of shelter may be served by crude systems of interlaced branches of trees covered with dried mud, the more permanent protection of a brick wall or a screen of sheets of glass fixed to or hung from a structural frame.

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