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A practical method is proposed for sampling large-dimension faced rigid foam plastic thermal insulation board in order to obtain a representative number of smaller-dimension test specimens for reproducibly measuring the board's thermal performance properties in conventional heat flow meter equipment. Using a statistical approach, six-specimen traverse sampling is shown to significantly reduce the required number of test specimens without inordinately increasing measurement error risk. Data are also provided which characterize the long-term protective benefits of aluminum foil facers in maintaining good thermal performance capability (aged k-factor).
thermal insulation, insulation board, foam insulation, faced foam board, urethane foam, heat flow meter, thermal conductivity, k, -factor, aged , k, -factor, statistical sampling
Senior research associate, Jim Walter Research Corp., St. Petersburg, Fla.