The following companies are subsidiares of Gibraltar Industries: Air Vent, Air Vent Inc., Alabama Metal Industries Corporation, American Wilcon Plastics Inc., Apeks LLC, Appleton Supply Co. Inc., Appleton Supply Company Inc., Architectural Mailboxes, Architectural Mailboxes LLC, Construction Metals Inc., Covert Operations Inc., D.S. Brown, D.S. Brown Company, D.S.B. Holding Corp., Delta Separations, Dramex Corporation, Florence Corp., Florence Corporation, Florence Corporation of Kansas, Gibraltar Industries Holding Company (UK) Limited, Gibraltar Steel Corporation of New York, Harbor, Hi-Temp, Home Impressions Inc., Hughes, K&W Metal Fabricators Inc., Milcor Inc., Nexus Corp, Noll Manufacturing Company, Noll/Norwesco LLC, Pacific Award Metals Inc., Pacific Awards Metals Inc., Package Concierge, Package Concierge Inc., Pennsylvania Industrial Heat Treating Inc., Portals Plus Incorporated, Prospiant Inc., RBI Solar Inc., RBI Solar KK, Renown Specialties Company Ltd., Renusol America Inc., Renusol Gmbh, Rough Brothers, Rough Brothers Greenhouse Manufacturing (Shanghai) Co. Ltd, Rough Brothers Holding Co. Inc., Rough Brothers Manufacturing Inc., SCM Metal Products Inc., Solar Group, Solar Group Inc., SolarBOS, SolarBOS Inc., Sorst Streckmetall GmbH, Southeastern Metals Manufacturing Company, Southeastern Metals Manufacturing Company Inc., Sunfig Corpotation, TerraSmart LLC, TerraSmart LLC, The Expanded Metal Company Limited, Thermo Energy Solutions Inc., Thermo Energy Systems, United Steel Products Company, and Wm. R. Hubbell Steel Company.