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� <br /> ' <br /> .� <br /> 2 1 M/�NUFAC"I'URERS, continued <br /> B. Hacker Industries: "Firm Fill" 2000 psi � <br /> 2.2 MATERIALS <br /> A. Underlayment: Gypsum based mix. '� <br /> B. Water: Potable and not detrimental to underlayment mix materia(s. <br /> C. Primer: Manufacturer's recommended type. <br /> D. Joint and Crack Filler: Latex based. � <br /> 2.3 MIXINU <br /> A. Site mix materials in accordance with manufacturer's instructions � <br /> B. Mix to self-leveling consistency. <br /> PART 3 EXECUTION � <br /> 3.1 EXAMINATION <br /> A. Section 01100 - General Requirements: Verification of existing conditions prior to � <br /> beginning work <br /> B. Verify that substrate surfaces are clean, dry, unfrozen, do not contain petroleum bi- <br /> products, or other compounds detrimental to underlayment material bond to � <br /> sub strate. � <br /> 3.2 PREPARATION � <br /> A. Remove substrate surface irregularities. Fill voids and deck joints with filler. <br /> Finish smooth. � <br /> B. Vacuum clean surfaces. <br /> C. Prime substrate in accordance with manufacturer's instructions. Allow to dry. <br /> D. Close floor openings. � <br /> 3.3 APPLICATION <br /> A Install underlayment in accordance with manufacturer's instructions. �� <br /> B. Place to thickness indicated. <br /> C. Place after partition installation. <br /> 3.4 CURING � <br /> A. Air cure in accordance with manufacturer's instructions. ' <br /> 3.5 PROTECTION OF FINISHED WORK � <br /> A. Section 01700 - Contract Closeout: Protecting installed work. <br /> B. Do not permit traffic over unprotected floor underlayment surf'aces. � <br /> END OF SECTION , <br /> Division 3 -Section 03505 � <br /> Pagc 2 of 2 ' <br /> r <br />