Exhibit 99.1

Summit Materials Announces Second Quarter 2014 Results

Denver, Colorado (August 6, 2014)—Summit Materials, LLC today announced results for the quarter ended June 28, 2014.

Notable items for the quarter and first half of 2014, as compared to the prior year, include:

Tom Hill, the President and CEO of Summit Materials, stated, “This quarter, we continued to build off of the momentum we had at the start of the year and we were able to achieve a $56.8 million increase in product revenue and a $69.5 million increase in total revenue compared to the second quarter of 2013. Our operating income improved 147% and Adjusted EBITDA increased 70%, while SG&A expenses fell to 11% of net sales, which is a 4% reduction as compared to the second quarter of 2013. Our product pricing increased in many of our markets, most notably in Missouri and Kansas. We continue to focus on growing our materials and products sales and improving margins in our paving and other services. It is encouraging seeing our aggregate backlog 6% greater than it was at this point last year and an 8% increase in our aggregate volumes from organic growth, reflecting an overall increase in market demand. In addition, this quarter we increased our presence in Texas with the acquisition of Troy Vines., Inc, an integrated aggregates and ready-mixed concrete business. We also acquired Buckhorn Materials LLC, an aggregates business serving North and South Carolina. In addition, our January acquisition of Alleyton Resources continues to provide strong results and is being seamlessly integrated with the rest of the company.”

Second Quarter Regional Results

West Region Results – The West Region’s revenue increased 44% due to higher aggregates, ready-mixed concrete and asphalt volumes and improved aggregate pricing. The increase in volumes was driven primarily by the Alleyton and Troy Vines acquisitions, contributing approximately $42.6 million of revenue. Adjusted EBITDA in the West Region increased $23.9 million. This was primarily driven by improved margins and the volume increases, primarily from our acquisitions in Texas.

Central Region Results – The Central Region’s revenue increased 18%, which was primarily through organic growth. Aggregates, ready-mixed concrete and asphalt volumes improved and the region experienced pricing improvements across the majority of the product lines. Adjusted EBITDA improved $3.7 million primarily due to the revenue growth and realized cost efficiencies.

East Region Results – The East Region’s revenue and Adjusted EBITDA remained relatively consistent.

Liquidity and Capital Resources

Our primary sources of liquidity include cash on-hand, cash provided by our operations and amounts available for borrowing under our credit facilities. As of June 28, 2014, we had $20.8 million in cash and working capital of $128.7 million as compared to cash and working capital of $14.9 million and $85.4 million, respectively, at December 28, 2013. We calculate working capital as current assets less current liabilities, excluding the current portion of long term debt and outstanding borrowings on our revolving credit facility (“Revolver”). As of June 28, 2014, our remaining borrowing capacity on our Revolver was $62.2 million, net of $22.8 million of outstanding letters of credit.

Given the seasonality of our business, we typically experience significant fluctuations in working capital needs and balances throughout the year. Our working capital requirements generally increase during the first half of the year as we build up inventory and focus on repair and maintenance and other set up costs for the upcoming season. Working capital levels then generally decrease toward the end of the year, which is when we generally see significant inflows of cash from the collection of receivables.

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Free cash flow, a non-GAAP measure defined as net cash used for operating activities less net capital expenditures, was $89.2 million and $81.1 million in the six month periods ended June 28, 2014 and June 29, 2013, respectively. We invested $8.7 million more in capital projects and generated $1.1 million less from asset sales in the first half of 2014 compared to 2013.

About Summit Materials, LLC

Summit Materials is a leading U.S. aggregates based construction materials company that supplies aggregates, cement, ready-mixed concrete, and provides paving and other services. We are committed to promoting the success of our businesses by offering a safe place to work and implementing best practices, while striving to exceed our environmental and social responsibilities. Summit Materials was formed in 2008 by its President and CEO Tom W. Hill and a small group of investors, including members of its management team, Blackstone Capital Partners (an affiliate of The Blackstone Group) and Silverhawk Capital Partners. Since then, Summit Materials has completed 31 acquisitions, which are organized into nine operating companies in three distinct geographic regions across the United States.

For more information about Summit Materials, please contact us at info@summit-materials.com.

Conference Call Information

The Company will conduct a conference call at 1:00 p.m. Eastern Time (11:00 a.m. Mountain Time) on Wednesday, August 6, 2014. Interested parties may access this event at https://viavid.webcasts.com/starthere.jsp?ei=1040202.

For those investors without online web access, the conference call may be accessed at:

Non-GAAP Financial Measures

The rules of the Securities and Exchange Commission (the “SEC”) regulate the use in filings with the SEC of “non-GAAP financial measures,” such as Adjusted EBITDA, Pro Forma Adjusted EBITDA and free cash flow, that are derived on the basis of methodologies other than in accordance with GAAP. We have provided Adjusted EBITDA and Pro Forma Adjusted EBITDA because we believe that they provide investors with additional information to measure our performance, evaluate our ability to service our debt and evaluate certain flexibility under our restrictive covenants. Pro Forma Adjusted EBITDA is defined in our senior secured credit facilities and used to measure compliance with covenants, including interest coverage and debt incurrence, and is used to measure our debt incurrence and restricted payment capacity under the indenture governing our senior notes. Our use of the terms Adjusted EBITDA and Pro Forma Adjusted EBITDA may vary from the use of such terms by others and should not be considered as alternatives to net income (loss), operating income (loss), revenue or any other performance measures derived in accordance with GAAP as measures of operating performance or to cash flows as measures of liquidity.

Adjusted EBITDA and Pro Forma Adjusted EBITDA and other non-GAAP measures have important limitations as analytical tools, and you should not consider them in isolation or as substitutes for analysis of our results as reported under GAAP. Some of the limitations of Adjusted EBITDA and Pro Forma Adjusted EBITDA are that these measures do not reflect: (i) changes in, or cash requirements for, our working capital needs; (ii) the significant interest expense or cash requirements necessary to service interest and principal payments on our debt; and (iii) any cash requirements for the replacement cost of assets being depreciated or amortized. Because of these limitations, we rely primarily on our GAAP results and use Adjusted EBITDA and Pro Forma Adjusted EBITDA only supplementally.

We define free cash flow as net cash provided by (used for) operating activities less purchases of property, plant and equipment. It is a metric used by our senior management to assess the performance of our segments.

Adjusted EBITDA, Pro Forma Adjusted EBITDA and free cash flow reflect an additional way of viewing aspects of our business that, when viewed with our GAAP results and the accompanying reconciliations to GAAP financial measures included in the tables attached to this press release, may provide a more complete understanding of factors and trends affecting our business. However, non-GAAP financial measures should not be construed as being more important than other comparable GAAP financial measures and

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should be considered in conjunction with the GAAP measures. In addition, non-GAAP financial measures are not standardized; therefore, it may not be possible to compare such financial measures with other companies’ non-GAAP financial measures having the same or similar names. We strongly encourage investors to review our consolidated financial statements in their entirety and not rely on any single financial measure.

Reconciliations of net income (loss) to Adjusted EBITDA and cash flows used for operations to free cash flow for the three and six months ended June 28, 2014 and of net income (loss) to Pro Forma Adjusted EBITDA for the twelve months ended June 28, 2014 and December 28, 2013 are included in the tables attached to this press release.

Cautionary Statement Regarding Forward-Looking Statements

This press release contains “forward-looking statements” within the meaning of the federal securities laws, which involve risks and uncertainties. Forward-looking statements include all statements that do not relate solely to historical or current facts, and you can identify forward-looking statements because they contain words such as “believes,” “expects,” “may,” “will,” “should,” “seeks,” “intends,” “trends,” “plans,” “estimates,” “projects” or “anticipates” or similar expressions that concern our strategy, plans, expectations or intentions. Any and all statements made relating to our estimated and projected earnings, margins, costs, expenditures, cash flows, sales volumes and financial results are forward-looking statements. These forward-looking statements are subject to risks and uncertainties that may change at any time, and, therefore, our actual results may differ materially from those expected. We derive many of our forward-looking statements from our operating budgets and forecasts, which are based upon many detailed assumptions. While we believe that our assumptions are reasonable, it is very difficult to predict the impact of known factors, and, of course, it is impossible to anticipate all factors that could affect our actual results.

In light of the significant uncertainties inherent in the forward-looking statements included herein, the inclusion of such information should not be regarded as a representation by us or any other person that the results or conditions described in such statements or our objectives and plans will be achieved. Important factors could affect our results and could cause results to differ materially from those expressed in our forward-looking statements, including but not limited to the factors discussed in the section entitled “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 28, 2013, filed with the SEC as such factors may be updated from time to time in our periodic filings with the SEC.

All subsequent written and oral forward-looking statements attributable to us, or persons acting on our behalf, are expressly qualified in their entirety by these cautionary statements.

We undertake no obligation to publicly update or revise any forward-looking statement as a result of new information, future events or otherwise, except as otherwise required by law.

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SUMMIT MATERIALS, LLC AND SUBSIDIARIES

Consolidated Balance Sheets

($ in thousands)

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SUMMIT MATERIALS, LLC AND SUBSIDIARIES

Unaudited Consolidated Statements of Operations

($ in thousands)

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SUMMIT MATERIALS, LLC AND SUBSIDIARIES

Unaudited Consolidated Statements of Cash Flows

($ in thousands)

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SUMMIT MATERIALS, LLC AND SUBSIDIARIES

Unaudited Financial Highlights

($ in thousands)

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SUMMIT MATERIALS, LLC AND SUBSIDIARIES

Unaudited Reconciliations of Non-GAAP Financial Measures

($ in thousands)

The tables below reconcile our net income (loss) to Adjusted EBITDA and present Adjusted EBITDA by segment for the three and six month periods ended June 28, 2014 and June 29, 2013.

The following table reconciles net cash used for operating activities to free cash flow for the three and six month periods ended June 28, 2014 and June 29, 2013.

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SUMMIT MATERIALS, LLC AND SUBSIDIARIES

Unaudited Reconciliations of Non-GAAP Financial Measures

($ in thousands)

The following table presents a reconciliation of net income (loss) to Pro Forma Adjusted EBITDA for the twelve months ended June 28, 2014 and December 28, 2013.

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SUMMIT MATERIALS, LLC AND SUBSIDIARIES

Unaudited Credit Statistics

($ in millions)

The following is a summary of our credit statistics as of and for the twelve months ended June 28, 2014 and December 28, 2013:

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