Polyurea (PUA) foam, the product of a reaction between polymeric MDI and water, has been developed as a new retrofit insulation material. PUA foam has demonstrated commercially acceptable physical and fire properties. Studies of local temperature build-up around electric circuitry embedded in PUA foam in dicate that heat build-up presents no problem in or around conductors and switch and outlet boxes. A study of fuel consumption in houses retrofitted with PUA foam indicate fuel savings of up to 50 percent due to its insulation proper ties.
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References
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Galbraith, C.J., Cartmell, M.J. and Brown, R.K., "Low Density Foam for Retrofit Insulation," Presented at UFCA Meeting, Orlando, Florida, January 22, 1981.
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U.S. Department of Energy, Field Measurement of Branch Circuit Wire Temperatures, Thomas K. Faison, September 1981 (issued November, 1981).
