Acquisitions - Schedule of Fair Value of Assets and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Oct. 25, 2021	Feb. 01, 2021	Apr. 02, 2022	Jan. 01, 2022	Jan. 02, 2021
Business Acquisition [Line Items]
Goodwill			$ 370,366	$ 364,598	$ 364,598
ECO [Member]
Business Acquisition [Line Items]
Accounts receivable		$ 4,790
Inventories		7,044
Contract assets, net		4,189
Prepaid expenses and other assets		947
Property and equipment		23,818
Operating lease right-of-use asset		26,815
Intangible assets		74,300
Goodwill		25,584
Total assets acquired		167,487
Accounts payable		(6,925)
Accrued and other liabilities, including customer deposits		(4,819)
Operating lease liability		(26,815)
Total liabilities assumed		(38,559)
Net assets acquired		128,928
Redeemable non-controlling interest		(28,464)
Fair value of consideration transferred		100,464
Cash		94,356
PGTI common stock		6,108
Fair value of consideration transferred		100,464
ECO [Member] | Previously Reported [Member]
Business Acquisition [Line Items]
Accounts receivable		5,031
Inventories		7,728
Contract assets, net		4,312
Prepaid expenses and other assets		1,706
Property and equipment		24,009
Operating lease right-of-use asset		27,864
Intangible assets		72,700
Goodwill		30,051
Total assets acquired		173,401
Accounts payable		(6,809)
Accrued and other liabilities, including customer deposits		(4,215)
Operating lease liability		(27,864)
Total liabilities assumed		(38,888)
Net assets acquired		134,513
Redeemable non-controlling interest		(34,084)
Fair value of consideration transferred		100,429
Cash		94,321
PGTI common stock		6,108
Fair value of consideration transferred		100,429
ECO [Member] | Adjustments to Allocation [Member]
Business Acquisition [Line Items]
Accounts receivable		(241)
Inventories		(684)
Contract assets, net		123
Prepaid expenses and other assets		(759)
Property and equipment		(191)
Operating lease right-of-use asset		(1,049)
Intangible assets		(1,600)
Goodwill		(4,467)
Total assets acquired		(5,914)
Accounts payable		(116)
Accrued and other liabilities, including customer deposits		(604)
Operating lease liability		1,049
Total liabilities assumed		329
Net assets acquired		(5,585)
Redeemable non-controlling interest		5,620
Fair value of consideration transferred		35
Cash		35
Fair value of consideration transferred		$ 35
Anlin Windows & Doors [Member]
Business Acquisition [Line Items]
Accounts receivable	$ 10,803
Inventories	7,306
Contract assets, net	7,027
Prepaid expenses and other assets	672
Property and equipment	24,309
Operating lease right-of-use asset	3,464
Intangible assets	72,000
Goodwill	11,364		$ 11,400
Total assets acquired	136,945
Accounts payable	(4,582)
Accrued and other liabilities	7,993
Operating lease liability	3,464
Total liabilities assumed	(16,039)
Fair value of consideration transferred	120,906
Purchase price	113,500
Cash	114,196
Contingent consideration	6,710
Fair value of consideration transferred	120,906
Anlin Windows & Doors [Member] | Previously Reported [Member]
Business Acquisition [Line Items]
Accounts receivable	10,803
Inventories	7,633
Contract assets, net	7,027
Prepaid expenses and other assets	1,626
Property and equipment	22,800
Operating lease right-of-use asset	3,450
Intangible assets	77,800
Goodwill	5,596
Total assets acquired	136,735
Accounts payable	(5,175)
Accrued and other liabilities	7,993
Operating lease liability	3,450
Total liabilities assumed	(16,618)
Fair value of consideration transferred	120,117
Cash	114,196
Contingent consideration	5,921
Fair value of consideration transferred	120,117
Anlin Windows & Doors [Member] | Adjustments to Allocation [Member]
Business Acquisition [Line Items]
Inventories	(327)
Prepaid expenses and other assets	(954)
Property and equipment	1,509
Operating lease right-of-use asset	14
Intangible assets	(5,800)
Goodwill	5,768
Total assets acquired	210
Accounts payable	(593)
Operating lease liability	14
Total liabilities assumed	(579)
Fair value of consideration transferred	789
Contingent consideration	789
Fair value of consideration transferred	$ 789