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The results of a field experiment in which 85 Ghanaian hardwood timbers were tested against damage by subterranean termites in the presence of micro-organisms are presented. Some of the timbers have very high natural resistance against biodegradation while others are destroyed easily. Between these extremes other timbers are ranked as resistant or moderately resistant. A list of the nonresistant timbers which can be treated easily with chemical preservatives is given. It is recommended that, for interior constructional work, more reliance be placed on good constructional methods than on the natural resistance of the timber to be used.
timber, natural resistance, durability, tropical hardwoods, termite damage, constructional timber, building materials
Research officer and head of Termite Research Section, Building and Road Research Institute, Kumasi,
Senior lecturer, University of York,