EXHIBIT 21

SUBSIDIARIES

The following is a list of the subsidiaries of Gibraltar Industries, Inc. as of December 31, 2015. The names of indirectly owned subsidiaries are indented under the names of their respective parent corporations:

Gibraltar Steel Corporation of New York		New York
	Southeastern Metals Manufacturing Company, Inc.	Florida
	Pacific Awards Metals, Inc.	California
	Construction Metals, LLC	California
	Noll/Norwesco, LLC	Delaware
	Air Vent Inc.	Delaware
AMICO Holding Company, Inc.		Delaware
	Alabama Metal Industries Corporation	Delaware
	Diamond Perforated Metals, Inc.	California
	Sea Safe, Inc.	Louisiana
	AMICO Canada, Inc.	Canada
Gibraltar Industries (UK) Limited		United Kingdom
	The Expanded Metal Company Limited	United Kingdom
Gibraltar Industries Germany GmbH		Germany
	Sorst Streckmetall GmbH	Germany
Solar Group, Inc.		Delaware
Appleton Supply Company, Inc.		Delaware
Florence Corporation		Illinois
	Florence Corporation of Kansas	Kansas
D.S.B. Holding Corp.		Delaware
The D.S. Brown Company		Ohio
Seismic Energy Products, Inc.		Delaware
Gibraltar Industries Holding Company (UK)		United Kingdom
Rough Brothers Holding Co., Inc.		Ohio
	Delta T Solutions, Inc.	California
	RBI Solar, Inc.	Ohio
	RBI International, LLC	Ohio
	RBI Solar Brazil LTDA	Brazil
	RBI Solar KK	Japan
	Renusol Gmbh	Germany
	Renusol America, Inc.	Delaware
	Rough Brothers Manufacturing, Inc.	Ohio
	Rough Brothers Asia LLC	Ohio
	Rough Brothers Greenhouse Manufacturing (Shanghai) Co., Ltd	China
	Rough Brothers, Inc.	Ohio
	Rough Brothers Construction, Inc.	Ohio