Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

CD&R Investment Associates X, Ltd.

2. Date of Event Requiring Statement (MM/DD/YYYY) 11/16/2018

3. Issuer Name and Ticker or Trading Symbol

NCI BUILDING SYSTEMS INC [NCS]

(Last) (First) (Middle)

C/O CLAYTON, DUBILIER & RICE, LLC, 375 PARK AVENUE, 18TH FLOOR

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director ___ X ___ 10% Owner
_____ Officer (give title below) _____ Other (specify below)

(Street)

NEW YORK, NY 10152

(City) (State) (Zip)

5. If Amendment, Date Original Filed (MM/DD/YYYY)

6. Individual or Joint/Group Filing (Check Applicable Line)

___ Form filed by One Reporting Person
_ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock, $0.01 par value	39128929 ⁽¹⁾	I	By affiliate ⁽²⁾

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)

Explanation of Responses:
(1)	39,128,929 shares of common stock, par value $0.01 per share (the "Common Shares"), of the Issuer were issued to CD&R Pisces Holdings, L.P. ("CD&R Holdings") on November 16, 2018 in a single issuance by the Issuer upon consummation of a merger transaction pursuant to which Ply Gem Parent, LLC ("Ply Gem") merged with and into the Issuer, with the Issuer continuing its existence as a corporation organized under the laws of the State of Delaware.
(2)	CD&R Investment Associates X, Ltd. ("CD&R Holdings GP"), as the general partner of CD&R Holdings, may be deemed to beneficially own the Common Shares of which CD&R Holdings has beneficial ownership as shown in Table 1 of this Form 3. CD&R Holdings GP expressly disclaims beneficial ownership of such Common Shares. Investment and voting decisions with respect to the Common Shares held by CD&R Holdings or CD&R Holdings GP are made by an investment committee comprised of more than ten investment professionals of Clayton, Dubilier & Rice, LLC (the "Investment Committee"). All members of the Investment Committee also expressly disclaim beneficial ownership of the Common Shares of which CD&R Holdings has beneficial ownership as shown in Table 1 of this Form 3.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
CD&R Investment Associates X, Ltd. C/O CLAYTON, DUBILIER & RICE, LLC 375 PARK AVENUE, 18TH FLOOR NEW YORK, NY 10152		X
CD&R Pisces Holdings, L.P. C/O CLAYTON, DUBILIER & RICE, LLC 375 PARK AVENUE, 18TH FLOOR NEW YORK, NY 10152		X

Signatures
CD&R Investment Associates X, Ltd.: By: /s/ Theresa A. Gore, Vice President, Treasurer and Assistant Secretary		11/26/2018
^** Signature of Reporting Person		Date
CD&R Pisces Holdings, L.P.: By: CD&R Investment Associates X, Ltd., its general partner; By: /s/ Theresa A. Gore, Vice President, Treasurer and Assistant Secretary		11/26/2018
^** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.