WARRANTY LIABILITY (Tables)

9 Months Ended

Jun. 30, 2021

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,
	2021		2020		2021		2020
Balance, beginning of period	$	12,678	$	7,789	$	10,843	$	7,894
Warranties issued and changes in estimated pre-existing warranties	4,806		5,773		16,022		14,000
Actual warranty costs incurred	(4,304)		(3,661)		(13,685)		(11,993)
Balance, end of period	$	13,180	$	9,901	$	13,180	$	9,901