Reportable Segment and Geographical Information - Adjusted Segment EBITDA (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]
Total net sales	$ 1,442,788	$ 1,431,356	$ 4,046,027	$ 3,941,345
Total 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)
Foreign exchange gain (loss)	(3,135)	782	605	(6,004)
Bargain purchase gain	47,840	0	47,840	0
Other income, net	892	994	2,362	4,550
Loss before income taxes	(431,972)	(517,063)	(642,774)	(659,047)
Siding & Accessories
Segment Reporting Information [Line Items]
Total net sales	331,343	349,907	894,750	960,299
Operating Segments
Segment Reporting Information [Line Items]
Total net sales	1,444,179	1,433,000	4,050,202	3,945,702
Total 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]
Total net sales	644,647	674,568	1,868,192	1,877,707
Total 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]
Total net sales	332,412	351,381	898,245	964,197
Total 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]
Total net sales	467,120	407,051	1,283,765	1,103,798
Total reportable segment adjusted EBITDA	54,594	17,943	172,658	128,741
Depreciation and amortization	(35,288)	(30,941)	(104,415)	(84,089)
Intersegment sales
Segment Reporting Information [Line Items]
Total net sales	(1,391)	(1,644)	(4,175)	(4,357)
Corporate and Other
Segment Reporting Information [Line Items]
Corporate and Other	(46,245)	(54,050)	(135,401)	(171,359)
Depreciation and amortization	$ (1,318)	$ (1,031)	$ (3,937)	$ (2,521)