Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Armstrong World Industries, Inc.:

We consent to the use of our reports dated February 26, 2018, with respect to the consolidated balance sheets of Armstrong World Industries, Inc. and subsidiaries as of December 31, 2017 and 2016, and the related consolidated statements of earnings and comprehensive income, equity, and cash flows for each of the years in the three-year period ended December 31, 2017, and the related notes and financial statement schedule of valuation and qualifying reserves (collectively, the “consolidated financial statements”), and the effectiveness of internal control over financial reporting as of December 31, 2017, incorporated herein by reference and to the reference to our firm under the heading “Experts” in the prospectus.

/s/ KPMG LLP

Philadelphia, Pennsylvania

April 30, 2018