Exhibit No. 15 Armstrong World Industries, Inc. Lancaster, Pennsylvania Gentlemen: RE: Registration Statement Nos. 2-50942; 2-77936; 2-91890; 33-18996; 33-18997; 33-18998; 33-29768; 33-38837; 33-60070; 333-6333 With respect to the subject Registration Statement, we acknowledge our awareness of the incorporation by reference therein of our report dated May 12, 1997, related to our review of interim financial information. Pursuant to Rule 436(c) under the Securities Act, such report is not considered a part of a Registration Statement prepared or certified by an accountant or a report prepared or certified by an accountant within the meaning of Sections 7 and 11 of the Act. Very truly yours, KPMG PEAT MARWICK LLP Philadelphia, Pennsylvania May 12, 1997 24