POWER OF ATTORNEY
For SEC Section 16 Reporting and Related Matters

      I hereby constitute and appoint each of Mark A. Hershey, Christopher S.
Parisi and Stephen F. McNamara as my true and lawful attorneys-in-fact and
agents, and grant each of them, acting alone, full power to act on my behalf and
in my name, place and stead, in any and all capacities for the purposes of
signing on my behalf, any Form ID, Form 3, Form 4 or Form 5 required to be filed
by me pursuant to Section 16 of the Securities and Exchange Act of 1934, as
amended, and any Form 144 required to be filed by me under the Securities Act of
1933, as amended, and Rule 144 promulgated thereunder including, without
limitation, the power to sign any and all amendments to such forms, if any, and
to file such forms with the Securities and Exchange Commission, and to do and
perform each and every act and thing requisite or necessary to be done in
connection with such forms, as fully and to all intents and purposes as I might
or could do in person. The authority under this Power of Attorney shall continue
until I am no longer required to file Form ID, Form 3, Form 4, Form 5 and Form
144 with regard to my ownership of or transactions in securities of Armstrong
World Industries, Inc., unless earlier revoked in writing.

      I acknowledge that the above-named attorneys-in-fact are not assuming any
of my responsibilities to comply with Rule 144 of the Securities Act of 1933,
Section 16 of the Securities and Exchange Act of 1934, or any other securities
laws.

      IN WITNESS WHEREOF, I have signed my name this 22nd day of June, 2012.





      						/s/James J. Gaffney