Armstrong World Industries, a manufacturing company, completed the acquisition of Turf Design, a Chicago-based commercial interiors design house and maker of custom felt ceiling and wall solutions. Financial terms were not disclosed. "With the increasing demand for acoustical and sustainable interior solutions, expanding our felt offerings has been a top priority. Felt is one of the fastest growing specified products in the architectural specialty product space. Turf is the category leader that architects and designers have come to depend on to bring their creative designs to life. Turf also has a strong profit profile that will be accretive to our architectural specialties segment," Vic Grizzle, AWI CEO.