Investor Presentation

Price and Volume Analysis Broad-Based Y/Y Recovery In Organic Sales Volumes Average Selling Price, Excluding Acquisitions (y/y % change) 6.7% Aggregates -1.7% Sales Volume, Excluding Acquisitions (y/y % change) Aggregates 6.1% -9.7% Cement Cement Ready-Mix Concrete 9.2% 7.1% -5.4% 3.0% Asphalt 3.6% -19.2% 2Q16 7 Average Selling Price, Including Acquisitions (y/y % change) 9.5% Aggregates 16.6% 10.9% 2Q17 -0.5% Sales Volume, Including Acquisitions (y/y % change) Aggregates Cement 114.7% 10.7% 8.3% Cement Ready-Mix Concrete 29.8% 9.4% 2.9% Asphalt 15.3% 1.1% SUMMIT Materials

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