POWER OF ATTORNEY
For Executing Forms 3, 4 and 5


	The undersigned hereby constitutes and appoints each of Gina A. Beredo and
Jeffrey S. Wilke, signing singly, the undersigneds true and lawful
attorney-in-fact to:

	(1)	prepare, execute in the undersigneds name and on the undersigneds behalf,
and submit to the U.S. Securities and Exchange Commission (the "SEC") a Form ID,
including amendments thereto, and any other documents necessary or appropriate
to obtain codes and passwords enabling the undersigned to make electronic
filings with the SEC of reports required by Section 16(a) of the Securities
Exchange Act of 1934, as amended, or any rule or regulation of the SEC;

	(2)	prepare, execute for and on behalf of the undersigned, in the undersigneds
capacity as an officer and/or director of Owens Corning (the "Company"), Forms
3, 4 and 5 in accordance with Section 16(a) of the Securities Exchange Act of
1934, as amended, and the rules thereunder, and any other forms or reports the
undersigned may be required to file in connection with the undersigneds
ownership, acquisition, or disposition of securities of the Company;

	(2)	do and perform any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete and execute any such Form 3, 4 or 5 or
other form or report, and timely file such form or report with the United States
Securities and Exchange Commission and any stock exchange or other authority;
and

	(3)	take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorney-in-fact may approve in such
attorney-in-facts discretion.

	The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary and proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-facts substitute or substitutes, shall lawfully do or cause to be
done by virtue of this Power of Attorney and the rights and powers herein
granted.  The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigneds responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934, as amended.

	This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

	IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 3rd day of February, 2022.

/s/John D. Williams
John D. Williams