Defining a new condensation boundary for low-cost houses in South Africa


Computer simulations were used to establish the boundary of the geographical area of South Africa in which the climatic conditions are such that condensation may form on the internal roofs and walls of low-cost housing during the winter. Computer software, NewQUICK, developed for the passive design of buildings, was used to model a typical low-cost house with a floor area of 30 sq m, a corrugated iron roof, a concrete floor, and walls of 140 mm brickwork. By using known climatic conditions, it was possible to predict the probability of condensation in any given area, so establishing the regions which were likely to have problems. This eliminated the inconsistencies which would arise in trying to establish the problem areas by site visits, where the data would be confused by issues such as: quality of construction, state of repair, numbers of occupants, times of cooking and washing, etc.  33 refs.

Primary author(s): Mathews E H;Taylor P B;Kleingeld M;Geyser M F

Source: Build.Environ.

             Vol.38, No.12, 2003, p.1475-1484          




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