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MALLICK, F. H.; Ali, Z. F. Comfort in high density housing: the case of corrugated iron walls and roofs. In: CONFERENCE ON PASSIVE AND LOW ENERGY ARCHITECTURE, 20., 2003, Santiago do Chile. Anais... Santiago do Chile, 2003.
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Abstract

Scattered all over urban areas in Bangladesh are dense informal settlements, where middle to lower middle-income population live. The houses are densely packed and usually low rise, mainly because investments are low and does not allow for multilevel buildings. Materials used are inexpensive, corrugated iron (CI) sheets for roofing and walls or at best masonry walls. Given the climate of Bangladesh corrugated iron is not a thermally suitable building material because of its high conductivity. In the long hot summer months these houses are like heat collectors and thus uncomfortable. The use of a bamboo ceiling helps. Because diurnal ranges are low, about 5º C for about 6 month of the year, indoors are not cool even at nightRead these notes carefully all the way through and follow them as precisely as possible. The paper is part of an extended research project aimed at examining ways of improving thermal condition in CI sheet construction. It examines occupancy conditions in some such houses with CI sheet as the main building material. Temperature data from these houses are compared to suggest differences in thermal conditions because of the way CI sheet is used. Some modifications were made to parts of the CI sheet components of one of the houses with locally available inexpensive materials, such as bamboo mat and coir (fibre from dried coconut husk); and measurements were made to see if they yield changes in indoor conditions to justify major retrofitting. Data of surface temperatures suggest that indoor conditions will improve if the entire wall and roof surfaces were treated in the manner of the experiments. This could lead to affordable means of retrofitting these houses so that comfortable occupancy can be achieved.
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