Exhibit 32.3

CERTIFICATION OF THE CHIEF FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION
1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of International Aluminum Corporation (the “Company”) on Form 10-Q for the period ending December 31, 2004, as filed with the Securities and Exchange Commission (the “Report”), I, Mitchell K. Fogelman, the Senior Vice President-Finance and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: February 10, 2005	/s/ MITCHELL K. FOGELMAN
	Mitchell K. Fogelman
	Senior Vice President - Finance
	and Chief Financial Officer

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