Investor Presentaiton

Creating a World Leading Joint Venture Asia - Australasia Middle East Buldomething great BORAL BORAL® Mike Kane CEO & Managing Director 17 October 2013 USG Cautionary Statements 1/2x4'-12 Light Ultralight 1/2x2 UltraLight Brand UltraLight CK UltraLight ROCK and UltraL EETROCK and SHEETROCK Brand USH SHEETROCK US USG SHEETRO THIS DINE CLUE USG Jim Metcalf Chairman, President & CEO This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 related to management's expectations about future conditions. Actual business, market or other conditions may differ materially from management's expectations and, accordingly, may affect our sales and profitability or other results and liquidity. Actual results may differ materially due to various other factors, including: economic conditions, such as the levels of new home and other construction activity, employment levels, the availability of mortgage, construction and other financing, mortgage and other interest rates, housing affordability and supply, the levels of foreclosures and home resales, currency exchange rates and consumer confidence; capital markets conditions and the availability of borrowings under our credit agreement or other financings; our substantial indebtedness and our ability to incur substantial additional indebtedness; competitive conditions, such as price, service and product competition; shortages in raw materials; changes in raw material and energy costs; volatility in the assumptions used to determine the funded status of our pension plans; the loss of one or more major customers and our customers' ability to meet their financial obligations to us; capacity utilization rates for us and the industry; our ability to expand into new geographic markets and the stability of such markets; our ability to successfully enter into and operate the joint venture with Boral Limited, including risks that our joint venture partner, Boral Limited, may not fulfill its obligations as an investor or may take actions that are inconsistent with our objectives; our ability to protect our intellectual property and other proprietary rights; changes in laws or regulations, including environmental and safety regulations; the satisfactory performance of certain business functions by third party service providers; our ability to achieve anticipated savings from cost reduction programs; the outcome in contested litigation matters; the effects of acts of terrorism or war upon domestic and international economies and financial markets; and acts of God. We assume no obligation to update any forward-looking information contained in this presentation. Additional information concerning these and other factors may be found in our filings with the Securities and Exchange Commission, including the "Risk Factors" in our most recent Annual Report on Form 10-K. BORAL® USG 2

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