POWER OF ATTORNEY

Know all by these presents that the undersigned hereby constitutes and
appoints each of Robert F. Mehmel, Brian G. Harris, and Seth L. Kaplan,
signing individually,the undersigned's true and lawful
attorney-in-fact to:

(1) prepare and execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer and/or director of Griffon
Corporation (the 'Company'), (a) a Form ID (Uniform Application for
Access Codes to file on EDGAR), (b) Forms 3, 4, and 5 in accordance
with Section 16(a) of the Securities Exchange Act of 1934 and the
rules thereunder, (c) Forms 144 in accordance with Rule 144 of the
Securities Act of 1933, and (d) any other forms or reports the
undersigned may be required to file, each in connection with the
undersigned's ownership, acquisition, or disposition of securities of
the Company; and

(2) file (or cause to be filed) such forms or reports with the United States Securities and
Exchange Commission and any stock exchange or similar authority.

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, 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 or substitution or revocation, hereby ratifying and confirming
all that such attorney-in-fact, or such attorney-in-fact's 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.

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 either revoked in writing by the undersigned or, as to
each attorney-in-fact, until such time as such attorney-in-fact ceases to
be an employee of Griffon Corporation or one of its affiliates.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 21st day of August 2018.


/s/ Samanta H. Stewart

Signature

Name: Samanta H. Stewart