Inventories

12 Months Ended

Dec. 31, 2024

Inventory Disclosure [Abstract]

Inventories

4.INVENTORIES

Inventories at LIFO value consist of the following as of December 31 (in thousands):

	2024			2023
Finished goods	$	183,670		$	88,840
Raw materials		73,281			51,688
Total FIFO (first-in, first-out) inventories		256,951			140,528
Reserve to adjust inventories to LIFO value		(49,669	)		(33,439	)
Total LIFO inventories	$	207,282		$	107,089

Inventory related to Trex Residential composite decking and railing products is stated at the lower of LIFO cost or market. The Company periodically reviews its inventory for slow moving or obsolete items and writes down the related products to estimated market. During the year ended December 31, 2024 the Company adjusted reserves for estimated slow moving products or obsolescence. These reserves are not material.

Under the LIFO method, reductions in inventory cause a portion of the Company’s cost of sales to be based on historical costs rather than current year costs. There was no inventory reduction in 2024. During the year ended December 31, 2023, the Company had a liquidation of inventories produced in the prior year ended December 31, 2022. As a result, a portion of the Company’s cost of sales in 2023 was based on prior year costs rather than on current year costs. However, the prior year cost of inventory closely approximated the current year cost of inventory and the resulting effect of the liquidation of inventories on the Company’s cost of sales was immaterial in the year ended December 31, 2023.