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WARRANTY LIABILITY (Tables)
6 Months Ended
Mar. 31, 2025
Product Warranties Disclosures [Abstract]  
Schedule of Changes in Warranty Liability, Included in Accrued Liabilities
Changes in Griffon’s warranty liability, included in Accrued liabilities, for the three and six months ended March 31, 2025 and 2024 were as follows:
 Three Months Ended March 31,Six Months Ended March 31,
 2025202420252024
Balance, beginning of period$13,123 $15,461 $13,050 $20,781 
Warranties issued and changes in estimated pre-existing warranties5,119 9,104 10,321 10,044 
Actual warranty costs incurred(5,989)(9,662)(11,118)(15,922)
Balance, end of period$12,253 $14,903 $12,253 $14,903