Barnhart Specialty Contracting - Gypsum Concrete Floor Underlayments, Gypcrete, Radiant Heating gypcrete, gyp-crete, gypsum, concrete, gypsum concrete, barnhart, specialty, contracting, cementitious, floor, toppings, cementitious floor topping, Hacker, industries, Hacker Industries, firm-fill, cast, underlayment, cast underlayment, fireproofing, sound proofing, sound control, hydronic heat, radiant heat, radiant floor heat, fill, leveling, restoration, Gyp-Span, Tru-Screed, ornamental, plaster, ornamental plaster, venetian, venetian plaster, EIFS remediation, IIC, impact isolation classification, STC, sound transmission classification, contractor, kansas, missouri, ks, mo, topeka, kansas city, ron barnhart Barnhart Specialty Contracting is an expertly-trained Licensed Applicator for Hacker Industries Firm-Fill gypsum and cementitious floor underlayments.