POWER OF ATTORNEY

     Know all by these presents, that the undersigned hereby makes, constitutes
and appoints Michael P. O'Donnell and Ted Orban, and each of them singly, as the
undersigned's true and lawful attorneys-in-fact with full power and authority as
hereinafter described to:

     1.   execute for and on behalf of the undersigned, in the undersigned's
          capacity as an officer and/or director of XERIUM TECHNOLOGIES, INC.
          (the "Company"), Forms 3, 4 and 5 in accordance with Section 16(a) of
          the Securities Exchange Act of 1934, as amended (the "Act"), and the
          rules thereunder;

     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 and timely file such form with the United States
          Securities and Exchange Commission and any stock exchange or similar
          authority, including, but not limited to, executing a Form ID for and
          on behalf of the undersigned and filing such Form ID with the United
          States Securities and Exchange Commission; 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-fact's discretion.

     The undersigned hereby grants to each attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or 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 the acts such attorney-in-fact 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 each of the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, is not assuming any of the undersigned's responsibilities to comply
with Section 16 of the Act.

     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 each
of the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 8th day of December, 2008.

                                     By: /s/ Joan Badrinas Ardevol
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                             Print Name: Joan Badrinas Ardevol