Laboratory and field storageability tests were conducted on six coated fabrics to determine their capabilities for storage in the Temperate Zone over a period of three years. In the laboratory, the tensile strengths and elongation properties of the membranes were determined before and after the storage period. In the field, rolls of membranes were placed in racks and exposed to prevailing weather conditions with no protection from rain or sun. Inspections were made of the materials at periodic intervals and photographs were taken to show important developments. Measurements of temperature, precipitation, and relative humidity were recorded throughout the storage period.nResults of the storageability tests indicated the following:na. Cotton fabrics coated with a minimum of 8 oz per sq. yd of neoprene or nonmigrating vinyl plastic on each side withstood open storage satisfactorily for three years.nb. Vinyl coatings incorporating migrating plasticizers were unsuitable for prolonged open storage.nc. Cardboard cores were not suitable for prolonged open storage.nd. Membranes treated with dry-back reclaimed rubber adhesive were not satisfactory for open storage.
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