Exhibit 99.1

Armstrong World Industries Reports First Quarter 2012 Results

Key Highlights

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

First Quarter Results

Consolidated net sales decreased as improved pricing and favorable product mix were unable to offset volume declines. Volumes declined across all businesses and geographies, particularly in Europe.

The decline in operating income was driven by lower volumes and input cost inflation, a lower pension credit, and lower earnings from the WAVE joint venture, which were only partially offset by favorable price and reduced SG&A expense. Input cost inflation increased by approximately $7 million versus first quarter 2011, driven by an array of items. First quarter 2012 operating income was also impacted by approximately $15 million of accelerated depreciation and impairment charges associated with the closure of the previously idled Mobile, AL Building Products facility. Net income increased primarily due to lower income tax expense when compared to the prior year.

“First quarter sales came in slightly below our expectations due primarily to weaker demand in North American commercial markets late in the quarter and temporary service issues in our Wood business,” said Matt Espe, President and CEO. “Despite soft sales we delivered adjusted EBITDA of $82 million, which was in the middle of our guidance range. End-market demand recovery remains spotty and inconsistent in some markets, especially Europe. We do, however, continue to feel good about our opportunity in residential markets, especially for residential renovation activity as improving consumer confidence drives demand in the second half of 2012.”

(Non-GAAP) Financial Metrics*

Declines in adjusted operating income and EBITDA were driven by lower volumes and input cost inflation, a lower pension credit, and lower earnings from WAVE, which were only partially offset by favorable price and reduced manufacturing and SG&A expense. Adjusted net income and earnings per share also benefited from a reduction in the expected rate from 42% to 40%. The reduction in free cash flow was primarily due to increases in capital expenditures partially offset by higher after tax cash earnings.

Significant Q1 2012 actions

First Quarter Segment Highlights

Building Products

Net sales decreased as favorable pricing and mix only partially offset volume declines in all geographies. Operating income decreased as the first quarter of 2012 was impacted by approximately $15 million of accelerated depreciation and impairment charges associated with the closure of the previously idled Mobile, AL facility and approximately $4 million of previously announced costs associated with the end of the lockout at the Marietta, PA plant. Price improvements and reductions in SG&A expenses were unable to offset lower volumes, lower earnings from WAVE, and the costs described above.

Resilient Flooring

Net sales decreased as favorable mix was unable to offset volume declines across all geographies.

Operating income increased as reduced manufacturing costs and SG&A expenses more than offset the impact of lower volumes and raw material inflation. The 2011 operating loss included approximately $8.2 million of charges in the European Resilient flooring business related to severance and restructuring related activities.

Wood Flooring

Net sales decreased as volumes, price and mix were unfavorable compared to the prior year. Lower sales to Big Box customers were only partially offset by higher sales to independent retail customers. Shipments were negatively impacted as orders outpaced production capacity. To address the shipment backlog, we are adding back additional crewing and staffing at three plants. If not for capacity constraints, sales year on year would have improved. Operating income decreased primarily due to the margin impact of lower volumes.

Cabinets

Net sales decreased as mix improvements only partially offset volume declines. Operating loss increased as higher input costs and lower volumes were only partially offset by favorable mix.

Corporate

Unallocated corporate expense of $13.8 million in the first quarter of 2012 increased from $10.8 million in the prior year primarily due to a $3.5 million lower pension credit.

Market Outlook and Guidance

“We are reaffirming our full year sales guidance of $2.9 to $3.0 billion, and now expect to be at the lower end of that range,” said Tom Mangas, Senior Vice President and CFO. “We are also reaffirming our EBITDA guidance of $420 to $460 million, which we expect to achieve even if sales are at the lower end of our full year guidance. Second quarter sales and EBITDA are expected to be in the range of $740 to $780 million and $105 to $125 million, respectively.”

Additional forward looking non-GAAP metrics are available in the earnings call and investor presentations available on the web site at http://www.armstrong.com/ under the Investor Relations tab.

Earnings Webcast

Management will conduct a discussion for shareholders during a live Internet broadcast beginning at 1:00 p.m. Eastern time today. 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 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. 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 recent reports on Forms 10-K and 10-Q filed with the U.S. Securities and Exchange Commission (“SEC”). As a result, our actual results may differ materially from our expected results and from those expressed in our forward-looking statements. 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 performance can be found in its quarterly report on Form 10-Q for the quarter ended March 31, 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 March 31, 2012, Armstrong operated 32 plants in eight countries and had approximately 9,100 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 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.