Acquisitions - Schedule of Fair Value of Assets and Liabilities Assumed (Detail) - USD ($) $ in Thousands			3 Months Ended
	Oct. 25, 2021	Feb. 01, 2021	Jul. 02, 2022	Jan. 01, 2022	Jan. 02, 2021
Business Acquisition [Line Items]
Goodwill			$ 372,652	$ 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
Total assets acquired		141,903
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		103,344
Redeemable non-controlling interest		(28,464)
Net assets acquired, net of redeemable non-controlling interest		74,880
Goodwill		27,084
Fair value of consideration transferred		101,964
Cash		94,356
PGTI common stock		6,108
Contingent consideration		1,500
Fair value of consideration transferred		101,964
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
Total assets acquired		143,350
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		104,462
Redeemable non-controlling interest		(34,084)
Net assets acquired, net of redeemable non-controlling interest		70,378
Goodwill		30,051
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
Total assets acquired		(1,447)
Accounts payable		(116)
Accrued and other liabilities, including customer deposits		(604)
Operating lease liability		1,049
Total liabilities assumed		329
Net assets acquired		(1,118)
Redeemable non-controlling interest		5,620
Net assets acquired, net of redeemable non-controlling interest		4,502
Goodwill		(2,967)
Fair value of consideration transferred		1,535
Cash		35
Contingent consideration		1,500
Fair value of consideration transferred		$ 1,535
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
Total assets acquired	125,581
Accounts payable	(4,582)
Accrued and other liabilities	(7,993)
Operating lease liability	(3,464)
Total liabilities assumed	(16,039)
Net assets acquired	109,542
Goodwill	12,150		12,200
Fair value of consideration transferred	121,692
Cash	114,982		$ 800
Contingent consideration	6,710
Fair value of consideration transferred	121,692
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
Total assets acquired	131,139
Accounts payable	(5,175)
Accrued and other liabilities	(7,993)
Operating lease liability	(3,450)
Total liabilities assumed	(16,618)
Net assets acquired	114,521
Goodwill	5,596
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)
Total assets acquired	(5,558)
Accounts payable	593
Operating lease liability	(14)
Total liabilities assumed	579
Net assets acquired	(4,979)
Goodwill	6,554
Fair value of consideration transferred	1,575
Cash	786
Contingent consideration	789
Fair value of consideration transferred	$ 1,575