Hacker announced an increase from 66 to 86 Underwriters Laboratories listings for its line sold under the brand names of Firm-Fill Gypsum Concretes and Gyp-Span Radiant ...

Hacker Industries Inc. announced an increase from 66 to 86 Underwriters Laboratories listings for its line of floor underlayments sold under the brand names of Firm-Fill Gypsum Concretes and Gyp-Span Radiant. These 82 UL listings detail floor ceiling assemblies utilizing a Hacker floor underlayment as a component to achieve a 1-, 2-, 3- and 4-hour fire rating.