OSB Norbord Inc

CUSIP No. 65548P403

(1)Names of reporting persons. I.R.S. Identification Nos. of
above persons (entities only)
       LETKO, BROSSEAU & ASSOCIATES INC.

(2) Check the appropriate box if a member of a group (see instructions)
(a)
(b)

(3) SEC use only

(4) Citizenship or place of organization     CANADA
Number of shares beneficially owned by each reporting person with:

(5)Sole voting power    5,177,944


(6)Shared voting power


(7)Sole dispositive power       5,177,944


(8)Shared dispositive power

(9)Aggregate amount beneficially owned by each reporting person

        5,177,944

(10)Check if the aggregate amount in Row (9) excludes
certain shares (see instructions)

(11)Percent of class represented by amount in Row 9

                6.2%

(12)Type of reporting person (see instructions)

        FI








Item 1.
Item 1(a) Name of issuer: NORBORD INC.

Item 1(b) Address of issuer's principal executive offices:
        1 Toronto Street, Suite 600
        Toronto, ON
        M5C 2W4
        Canada

Item 2.
2(a) Name of person filing:
        Letko, Brosseau & Associates Inc.
2(b) Address or principal business office or,
if none, residence:
        1800 Mc Gill College Av.
        Suite 2510
        Montreal, QC
        H3A 3J6
        Canada

2(c) Citizenship:

         Canada

2(d) Title of class of securities:

        Common Shares

2(e) CUSIP No.: 65548P403


Item 3.

If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b) or (c),
check whether the person filing is a:
a. [ ] Broker or dealer registered under Section 15 of the Act.
b. [ ] Bank as defined in Section 3(a)(6) of the Act.
c. [ ] Insurance company as defined in Section 3(a)(19) of the Act.
d. [ ] Investment company registered under Section 8 of the
Investment Company Act of 1940.
e. [ ] An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);
f. [ ] An employee benefit plan or endowment fund in accordance with
Rule 13d-1(b)(1)(ii)(F);
g. [ ] A parent holding company or control person in accordance with
Rule 13d-1(b)(1)(ii)(G);
h. [ ] A savings associations as defined in Section 3(b) of the
Federal Deposit Insurance Act (12 U.S.C. 1813);
i. [ ] A church plan that is excluded from the definition of an
investment company under section 3(c)(14) of the Investment Company Act of 1940;
j. [x] A non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J);
k. [ ] Group, in accordance with Rule 13d-1(b)(1)(ii)(K).

Item 4. Ownership

Provide the following information regarding the aggregate number
and percentage of the class of securities of the issuer identified in Item 1.
a. Amount beneficially owned: 5,177,944
b. Percent of class: 6.2%
c. Number of shares as to which such person has:
i. Sole power to vote or to direct the vote: 5,177,944
ii. Shared power to vote or to direct the vote
iii. Sole power to dispose or to direct the disposition of: 5,177,944
iv. Shared power to dispose or to direct the disposition of



Item 5.

Ownership of 5 Percent or Less of a Class. If this statement is being
filed to report the fact that as of the date hereof the reporting person
has ceased to be the beneficial owner of more than 5 percent of the class
of securities, check the following [].



Item 6. Ownership of More than 5 Percent on Behalf of Another Person

Clients of Letko, Brosseau & Associates Inc. have the right to receive or
the power to direct the receipt of dividends from, or the proceeds
from sale of, the common shares reported as beneficially owned by
Letko, Brosseau & Associates Inc.
No clients of Letko, Brosseau & Associates Inc. beneficially owns
more than five percent of Issuer's Common Shares.



Item 7. Identification and Classification of the Subsidiary Which
Acquired the Security
Being Reported on by the Parent Holding Company or Control Person.

Not Applicable



Item 8. Identification and Classification of Members of the Group

Not Applicable



Item 9. Notice of Dissolution of Group

Not Applicable



Item 10. Certification
By signing below I certify that, to the best of my knowledge and belief,
the securities referred to above were acquired and are held in the ordinary
course of business, were not acquired and are not held for the purpose of
or with the effect of changing or influencing the control of
the issuer of the securities and were not acquired and are not held
in connection with or as a participant in any transaction having
that purpose or effect.





Signature

After reasonable inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this statement is true,
complete and correct.


Dated : February 4, 2019



Signature  Isabelle Godin

Name/Title:     Isabelle Godin
       Chief Financial Officer and Chief Compliance Officer