Exhibit 24

Quanex Building Products Corporation

Power of Attorney


The undersigned hereby constitutes and appoints Brent L. Korb, Jairaj
Chetnani, Kevin P. Delaney and Paul B. Cornett his true and lawful
attorneys-in-fact and agents, with full power of substitution and
re-substitution, for him and in his name, place and stead, in any
and all capacities, to complete and sign all Form 3s, Form 4s and
Form 5s relating to equity securities of Quanex Building Products
Corporation and to file the same, with all exhibits thereto or
documents in connection therewith, with the Securities and Exchange
Commission, the New York Stock Exchange and Quanex Building Products
Corporation, granting to said attorney-in-fact and agent, full power
and authority to do and perform each and every act and thing requisite
and necessary to be done in and about the premises, as fully to
all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorney-in-fact and agent,
or substitute or substitutes, may lawfully do or cause to be done
by virtue hereof.



Executed this 8th day of OCtober, 2009



/s/ Joseph J. Ross

Joseph J. Ross