Investor Presentation

Full-Year 2017 Price & Volume Analysis Y/Y Growth In Organic Materials Volumes Average Selling Price, Excluding Acquisitions (y/y % change) Aggregates -5.5% 4.8% -0.1% Sales Volume, Excluding Acquisitions (y/y % change) Aggregates 3.4% Cement Cement Ready-Mix Concrete 5.8% -3.4% -2.3% 3.3% Asphalt -13.0% 10.9% 2016 11 Average Selling Price, Including Acquisitions (y/y % change) 11.8% Aggregates 7.2% 15.6% 2017 Sales Volume, Including Acquisitions (y/y % change) Aggregates 1.2% Cement 37.0% 8.1% Cement 7.5% 12.2% Ready-Mix Concrete 22.4% 3.5% Asphalt 20.7% SUMMIT Materials

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