POWER OF ATTORNEY

      Know all by these presents, that the undersigned hereby constitutes and
      appoints each of Austin K. So and Alan M. Kidd of Armstrong World
      Industries, Inc. or any of them signing singly, and with full power of
      substitution, the undersigned?s true and lawful attorney-in-fact to:

      1. prepare, execute in the undersigned's name and on the undersigned's
         behalf, and submit to the U.S. Securities and Exchange Commission (the
         "SEC") a Form ID, including amendments thereto, and any other
         documents necessary or appropriate to obtain codes and passwords
         enabling the undersigned to make electronic filings with the SEC of
         reports required by Section 16(a) of the Securities Exchange Act of
         1934 or any rule or regulation of the SEC;

      2. take any other action of any type whatsoever in connection with the
         foregoing which, in the opinion of such attorney-in-fact, may be of
         benefit to, in the best interest of, or legally required by, the
         undersigned, it being understood that the documents executed by such
         attorney-in-fact on behalf of the undersigned pursuant to this Power
         of Attorney shall be in such form and shall contain such terms and
         conditions as such attorney-in-fact may approve in such attorney-in-
         fact's discretion.

      The undersigned hereby grants to each such attorney-in-fact full power
      and authority to do and perform any and every act and thing whatsoever
      requisite, necessary, or proper to be done in the exercise of any of the
      rights and powers herein granted, as fully to all intents and purposes
      as the undersigned might or could do if personally present, with full
      power of substitution or revocation, hereby ratifying and confirming all
      that such attorney-in-fact, or such attorney-in-fact's substitute or
      substitutes, shall lawfully do or cause to be done by virtue of this
      power of attorney and the rights and powers herein granted. The
      undersigned acknowledges that the foregoing attorneys-in-fact, in serving
      in such capacity at the request of the undersigned, are not assuming any
      of the undersigned's responsibilities to comply with Section 16 of the
      Securities Exchange Act of 1934.

      This Power of Attorney shall remain in full force and effect unless
      revoked by the undersigned in a signed writing delivered to the foregoing
      attorneys-in-fact.

      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
      be executed as of this 22nd day of February 2023.






/s/ Monica M. Maheshwari
Name: