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FIRM-FILL Gypsum Concretes and GYP-SPAN Radiant, supplied by Hacker Industries, Inc., address the entire spectrum of floor underlayment specifications. From single-family, multi-family, commercial and radiant heating, to sound control needs, there is a Hacker Floor Underlayment (HFU) designed to meet any job requirement.


With a billion square feet installed nationwide, a HFU is the cost-effective solution for sound control and fire-resistant ratings. Over wood or concrete substrates, a HFU provides a smooth, hard, crack-resistant surface ready for finished floor coverings.

Keeping abreast of the latest technologies in gypsum floor underlayments, Hacker Industries, Inc. has introduced many new products over the past year including FIRM-FILL 3310, the Dry Floor System and TRUE-SCREED Cementitious Underlayment.

All Hacker Floor Underlayments are installed by trained, Licensed Applicators who adhere to Hacker Industries stringent quality control procedures.