Reportable Segment and Geographical Information - Schedule of Disaggregated Expenses by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024
Segment Reporting Information [Line Items]
Net sales	$ 1,442,788	$ 1,431,356	$ 4,046,027	$ 3,941,345
Reportable segment adjusted EBITDA	177,279	178,408	516,852	551,385
Impairment of goodwill and intangible assets	(372,323)	(415,491)	(372,323)	(415,491)
Depreciation and amortization	(112,287)	(103,586)	(339,190)	(296,441)
Interest expense	(123,993)	(124,120)	(363,519)	(325,687)
Bargain purchase gain	47,840	0	47,840	0
Foreign exchange loss	(3,135)	782	605	(6,004)
Other income, net	892	994	2,362	4,550
Loss before income taxes	(431,972)	(517,063)	(642,774)	(659,047)
Windows & Doors
Segment Reporting Information [Line Items]
Net sales	644,325	674,398	1,867,512	1,877,248
Siding & Accessories
Segment Reporting Information [Line Items]
Net sales	331,343	349,907	894,750	960,299
Metal Solutions
Segment Reporting Information [Line Items]
Net sales	467,120	407,051	1,283,765	1,103,798
Intersegment sales
Segment Reporting Information [Line Items]
Net sales	1,391	1,644	4,175	4,357
Intersegment sales | Windows & Doors
Segment Reporting Information [Line Items]
Net sales	322	170	680	459
Intersegment sales | Siding & Accessories
Segment Reporting Information [Line Items]
Net sales	1,069	1,474	3,495	3,898
Intersegment sales | Metal Solutions
Segment Reporting Information [Line Items]
Net sales	0	0	0	0
Operating Segments
Segment Reporting Information [Line Items]
Net sales	1,444,179	1,433,000	4,050,202	3,945,702
Segment cost of sales	(1,116,636)	(1,106,038)	(3,073,257)	(2,984,316)
Segment selling, general and administrative expenses	(150,264)	(148,554)	(460,093)	(410,001)
Reportable segment adjusted EBITDA	177,279	178,408	516,852	551,385
Depreciation and amortization	(110,969)	(102,555)	(335,253)	(293,920)
Operating Segments | Windows & Doors
Segment Reporting Information [Line Items]
Net sales	644,647	674,568	1,868,192	1,877,707
Segment cost of sales	(532,173)	(527,784)	(1,506,463)	(1,471,180)
Segment selling, general and administrative expenses	(62,246)	(63,740)	(189,214)	(178,979)
Reportable segment adjusted EBITDA	50,228	83,044	172,515	227,548
Depreciation and amortization	(50,107)	(47,829)	(154,305)	(134,093)
Operating Segments | Siding & Accessories
Segment Reporting Information [Line Items]
Net sales	332,412	351,381	898,245	964,197
Segment cost of sales	(235,033)	(246,825)	(647,560)	(685,037)
Segment selling, general and administrative expenses	(24,922)	(27,135)	(79,006)	(84,064)
Reportable segment adjusted EBITDA	72,457	77,421	171,679	195,096
Depreciation and amortization	(25,574)	(23,785)	(76,533)	(75,738)
Operating Segments | Metal Solutions
Segment Reporting Information [Line Items]
Net sales	467,120	407,051	1,283,765	1,103,798
Segment cost of sales	(349,430)	(331,429)	(919,234)	(828,099)
Segment selling, general and administrative expenses	(63,096)	(57,679)	(191,873)	(146,958)
Reportable segment adjusted EBITDA	54,594	17,943	172,658	128,741
Depreciation and amortization	(35,288)	(30,941)	(104,415)	(84,089)
Corporate
Segment Reporting Information [Line Items]
Depreciation and amortization	(1,318)	(1,031)	(3,937)	(2,521)
Corporate and Other	$ (46,245)	$ (54,050)	$ (135,401)	$ (171,359)