Exhibit 31.3
I, Michael D. Lockhart, certify that:
| 1) | I have reviewed this Amendment No. 1 on Form 10-K/A of Armstrong World Industries, Inc.; and |
| 2) | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
Date:October 13, 2003
/s/ Michael D. Lockhart |
Michael D. Lockhart |
| Chief Executive Officer |