Exhibit 99.1

Armstrong World Industries Reports Second Quarter 2012 Results

Highlights for the Second Quarter of 2012

LANCASTER, Pa., July 30, 2012 —Armstrong World Industries, Inc. (NYSE: AWI), a global leader in the design and manufacture of floors, ceilings, and cabinets, today reported second quarter 2012 results.

Second Quarter Results

Consolidated net sales decreased approximately $39 million, or 5%, compared to the prior year period. Excluding approximately $17 million of unfavorable foreign exchange impact for the quarter, sales declined approximately 3% compared to the prior year period. On a consolidated level, improvements in price and mix were unable to offset broad volume declines in all businesses and geographies.

Operating income and net income both increased in spite of the margin impact of lower volumes, primarily due to cost reduction actions taken under our cost savings program, which resulted in lower manufacturing costs and core SG&A expenses when compared to the same period last year. Input cost inflation increased $2 million versus the second quarter of 2011.

“In spite of a soft sales environment in the second quarter, we were able to deliver adjusted EBITDA of $110 million, an improvement of 1% over the prior year and within our guidance range,” said Matt Espe, CEO. “We continue to see volumes down across our businesses as global markets continue to struggle, with Europe in particular, experiencing sharp volume declines in the second quarter. We will continue to responsibly manage our cost structure and adapt to the continued challenging market conditions. As a result we are increasing our cost savings target by another $15 million, bringing the total program goal to $200 million.”

Additional (non-GAAP) Financial Metrics*

In spite of sales declining 3% on a constant foreign exchange basis, adjusted operating income and EBITDA improved by 3% and 1%, respectively, in the second quarter of 2012 when compared to the prior year period. The improvement was driven by reductions in manufacturing costs, coupled with the impact of better pricing and reductions in SG&A expenses, which were partially offset by increased input costs. Adjusted net income and earnings per share also benefited from a reduction in the expected tax rate from 42% to 40%. The reduction in free cash flow was primarily due to a smaller decrease in working capital than in the second quarter of 2011 and higher capital expenditures, which were only partially offset by higher earnings and lower restructuring payments than in the prior year.

Second Quarter Segment Highlights

Building Products

Net sales declined on unfavorable foreign exchange impact of approximately $9 million. Excluding foreign exchange, sales for the second quarter of 2012 were roughly flat when compared to the prior year as continued volume declines were offset by better price and mix. Operating income declined as favorable pricing and higher earnings from the WAVE joint venture were unable to offset volume declines, environmental charges, severances associated with European headcount reductions and increased manufacturing costs associated with the start up of our Millwood, WV plant. Results for the second quarter of 2012 were also negatively impacted by approximately $4 million of charges associated with the closure of our Mobile, AL facility.

Resilient Flooring

Net sales declined as improvements in mix and price were unable to offset significant volume declines, particularly in Europe, and unfavorable foreign exchange impact of approximately $8 million. Sales for the second quarter of 2012 were also negatively impacted by inventory reductions at one of our “Big Box” customers. Operating income improved for the second quarter as volume declines and inflationary headwinds were more than offset by reductions in manufacturing costs and SG&A expenses and favorable price and mix. Operating income in the second quarter of 2011 included $5.9 million of severance and restructuring related costs in Europe.

Wood Flooring

Net sales decreased in the second quarter as volume, price and mix were all unfavorable when compared to the prior year, driven primarily by inventory reductions at one of our “Big Box” customers. Operating income increased in the second quarter of 2012 as reduced manufacturing costs more than offset the margin impact of lower sales and unfavorable mix and price.

Cabinets

Net sales decreased in the second quarter as improvements in mix were unable to offset volume declines. Operating income decreased in the second quarter as improvements in mix were unable to offset the margin impact of lower volumes and increases in raw material costs.

Corporate

Unallocated corporate expense of $11.6 million increased from $9.9 million in the prior year primarily due to a $3.5 million lower pension credit.

Year to Date Results

Excluding approximately $20 million unfavorable impact from foreign exchange rates, net sales decreased as volume declines were only partially offset by price and mix gains.

The decline in adjusted EBITDA and operating income was driven by the margin impact of lower sales, increased raw material costs, a lower pension credit, environmental charges related to several U.S ceilings plants, costs associated with the end of the lockout at the Marietta, PA ceilings plant and charges associated with the start up of our Millwood, WV plant, which were only partially offset by improved pricing and reductions in manufacturing costs and SG&A expenses. In the first six months of 2012 as reported operating income was also negatively impacted by approximately $19 million of charges associated with the closure of the Mobile, AL building products facility.

The reduction in free cash flow was primarily attributable to higher capital expenditures and less improvement in working capital when compared to the prior year, which were only partially offset by increased cash earnings and higher dividends from the WAVE joint venture.

Market Outlook and 2012 Guidance

Management’s macroeconomic outlook for 2012 has declined from the end of the first quarter. “We now expect our residential and commercial remodel opportunity to be lower as the domestic economic recovery decelerates and Eurozone economic conditions continue to worsen,” said Tom Mangas, Senior Vice President and CFO.

Management is lowering full year sales and EBITDA guidance and now expects sales to be in the $2.75 to $2.85 billion range and adjusted EBITDA to be in the $400 to $430 million range. 2012 adjusted EPS is expected to be $2.40 to $2.70 per diluted share and free cash flow is anticipated to be between $30 and $70 million. The Company identified savings opportunities in excess of the previously announced $185 million initiative. “We now expect to save approximately $200 million, with savings in 2012 now expected to be approximately $50 million, up from $35 million incorporated in our previous guidance,” said Mangas.

For the third quarter of 2012, sales are expected to be between $740 and $780 million and adjusted EBITDA to be in the range of $120 to $140 million. Additional forward looking non-GAAP metrics are available on our web site at http://www.armstrong.com/ under the Investor Relations tab.

Earnings Webcast

Management will host a live Internet broadcast beginning at 1:00 p.m. Eastern time today during which second quarter and year to date results will be discussed. This event will be broadcast live on the Company’s Web site. To access the call and accompanying slide presentation, go to www.armstrong.com. and click “For Investors”. The replay of this event will also be available on the Company’s Web site for up to one year after the date of the call.

Uncertainties Affecting Forward-Looking Statements

Disclosures in this release, including without limitation, those relating to future financial results guidance, and in our other public documents and comments contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Those statements provide our future expectations or forecasts and can be identified by our use of words such as “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “believe,” “outlook,” and other words or phrases of similar meaning in connection with any discussion of future operating or financial performance. Forward-looking statements, by their nature, address matters that are uncertain and involve risks because they relate to events and depend on circumstances that may or may not occur in the future. As a result, our actual results may differ materially from our expected results and from those expressed in our forward-looking statements. A more detailed discussion of the risks and uncertainties that could cause our actual results to differ materially from those projected, anticipated or implied is included in the “Risk Factors” and “Management’s Discussion and Analysis” sections of our reports on Forms 10-K and 10-Q filed with the U.S. Securities and Exchange Commission (“SEC”). Forward- looking statements speak only as of the date they are made. We undertake no obligation to update any forward-looking statements beyond what is required under applicable securities law.

About Armstrong and Additional Information

More details on the Company’s financial performance can be found in its quarterly report on Form 10-Q for the quarter ended June 30, 2012 that will be filed with the SEC today.

Armstrong World Industries, Inc. is a global leader in the design and manufacture of floors, ceilings and cabinets. In 2011, Armstrong’s consolidated net sales totaled approximately $2.9 billion. As of June 30, 2012, Armstrong operated 33 plants in eight countries and had approximately 9,300 employees worldwide. For more information, visit http://www.armstrong.com/.

As Reported Financial Highlights

FINANCIAL HIGHLIGHTS

Armstrong World Industries, Inc. and Subsidiaries

(amounts in millions, except for per-share amounts)

(Unaudited)

SEGMENT RESULTS

Armstrong World Industries, Inc. and Subsidiaries

(amounts in millions)

(Unaudited)

Selected Balance Sheet Information

(amounts in millions)

Selected Cash Flow Information

(amounts in millions)

(Unaudited)

Supplemental Reconciliations of GAAP to non-GAAP Results (unaudited)

(Amounts in millions, except per share data)

To supplement its consolidated financial statements presented in accordance with accounting principles generally accepted in the United States (GAAP), the Company provides additional measures of performance adjusted to exclude the impact of foreign exchange, restructuring charges and related costs, impairments, and certain other gains and losses. The Company uses these adjusted performance measures in managing the business, including communications with its Board of Directors and employees, and believes that they provide users of this financial information with meaningful comparisons of operating performance between current results and results in prior periods. The Company believes that these non-GAAP financial measures are appropriate to enhance understanding of its past performance, as well as prospects for its future performance. A reconciliation of these adjustments to the most directly comparable GAAP measures is included in this release and on the Company’s website. These non-GAAP measures should not be considered in isolation or as a substitute for the most comparable GAAP measures. Non-GAAP financial measures utilized by the Company may not be comparable to non-GAAP financial measures used by other companies.

CONSOLIDATED

BUILDING PRODUCTS

RESILIENT FLOORING

WOOD FLOORING

CABINETS

UNALLOCATED CORPORATE

CONSOLIDATED

CASH FLOW