Abstract
Although urea formaldehyde foam insulation (UFFI) is not a particularly good insulating material, because of its high initial water content and therefore its high volumetric shrinkage and known deterioration with age, it was installed in more than 80 000 Canadian homes before December, 1980, when its use was banned under the Hazardous Products Act. Subsequent studies in the laboratory and in the field have indicated that gases and/or particulales given off by UFFI cause illness in some people. This article discusses the nature of the problem and some of the studies carried out in Canada to improve understanding and develop methods of reducing exposure to the substances given off by the material.
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