pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/i0095-3679-21-1-3 Articles Roof Coatings for Reducing Warehouse Condensation Potential1 John S. Smith Jr. 2 Agricultural Engineer, USDA, ARS, National Peanut Research Laboratory, Dawson, Georgia 31742

1Mention of a trademark or proprietary product does not constitute a guarantee or warranty of the product by the U.S. Department of Agriculture and does not imply its approval to the exclusion of other products that may also be available.

 1 1994 21 1 9 11 29 1 1994 American Peanut Research and Education Society 1994 American Peanut Research and Education Society Abstract

White ceramic roof coatings were found to be significantly better than galvanized sheet metal in reducing the solar heat gain on roof panels like those used for the roof of a farmers stock peanut warehouse. However, the ceramic coatings were not better than a white acrylic latex paint in reducing solar heat gain. After four years of testing, there was no apparent difference in the durability of the ceramic coatings or paint. The ceramic coatings were reputed to have good thermal insulating properties, but these were not apparent in the study. The maximum mean two-hour temperature during the study occurred on September 14, 1991 with the galvanized control panel reaching a high of 69.3 C. The ceramic coated and painted panels due to their solar radiation reflective properties were approximately 19 C cooler than the galvanized control and approximately 14 C warmer than ambient temperature.

 Key Words Reflectance; , roof coatings; , solar radiation; , insulation; , painted surface; , peanut warehouse; , storage