4 1 edgar.txt FORM 4 - AUGUST 24, 2001 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP ( ) Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instructions 1(b). 1. Name and Address of Reporting Person McMahan, Michael L. 3817 Merriman Drive Plano, TX 75074 USA 2. Issuer Name and Ticker or Trading Symbol Elcor Corporation ELK 3. IRS or Social Security Number of Reporting Person (Voluntary) 4. Statement for Month/Year August 24, 2001 5. If Amendment, Date of Original (Month/Year) 6. Relationship of Reporting Person(s) to Issuer (Check all applicable) (X) Director ( ) 10% Owner ( ) Officer (give title below) ( ) Other (specify below) Director 7. Individual or Joint/Group Filing (Check Applicable Line) (X) Form filed by One Reporting Person ( ) Form filed by More than One Reporting Person

Explanation of Responses: SIGNATURE OF REPORTING PERSON /s/ Michael L. McMahan DATE September 10, 2001

MCMAHAN MICHAEL L 4