WARRANTY LIABILITY (Tables)

9 Months Ended

Jun. 30, 2020

Product Warranties Disclosures [Abstract]

Summary of Changes in Warranty Liability, Included in Accrued Liabilities

Changes in Griffon’s warranty liability, included in Accrued liabilities, were as follows:

	Three Months Ended June 30,						Nine Months Ended June 30,
	2020			2019			2020			2019
Balance, beginning of period	$	7,789		$	8,011		$	7,894		$	8,174
Warranties issued and changes in estimated pre-existing warranties	5,773			3,780			14,000			12,541
Actual warranty costs incurred	(3,661		)	(4,063		)	(11,993		)	(12,987		)
Balance, end of period	$	9,901		$	7,728		$	9,901		$	7,728