Exhibit 99.6 Appendix 3Y Change of Director’s Interest Notice

Rule 3.19A.2

Appendix 3Y

Change of Director’s Interest Notice

Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX’s property and may be made public.

Introduced 30/09/01 Amended 01/01/11

Name of entity			James Hardie Industries plc
ARBN			097 829 895

We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act.

Name of Director			Suzanne B. Rowland
Date of last notice			20 June 2025

+ See chapter 19 for defined terms.

Appendix 3Y Page 1    01/01/2011

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Appendix 3Y Change of Director’s Interest Notice

Part 1 - Change of director’s relevant interests in securities

In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust

Note: In the case of a company, interests which come within paragraph (i) of the definition of “notifiable interest of a director” should be disclosed in this part.

Direct or indirect interest			Indirect
Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest.			The registered holder of the indirect interest is Cede & Co., who hold the shares on behalf of Ms. Rowland, as beneficial owner.
Date of change			4 September 2025
No. of securities held prior to change			•Direct interest in 4,376 ordinary shares as registered holder. •Indirect interest in 5,000 ordinary shares. The registered holder is Cede & Co. and they are held for the beneficial owner, Suzanne B. Rowland.
Class			Ordinary shares.
Number acquired			770 ordinary shares
Number disposed			Nil
Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation			US$14,995.75
No. of securities held after change			Current relevant interest is: •Direct interest in 4,367 ordinary shares as registered holder •Indirect interest in 5,770 ordinary shares. The registered holder is Cede & Co. and they are held for the beneficial owner, Suzanne B. Rowland.
Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back			On-market purchase

+ See chapter 19 for defined terms.

Appendix 3Y Page 2    01/01/2011

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Appendix 3Y Change of Director’s Interest Notice

Part 2 – Change of director’s interests in contracts

Note: In the case of a company, interests which come within paragraph (ii) of the definition of “notifiable interest of a director” should be disclosed in this part.

Detail of contract			Not applicable
Nature of interest			Not applicable
Name of registered holder (if issued securities)			Not applicable
Date of change			Not applicable
No. and class of securities to which interest related prior to change Note: Details are only required for a contract in relation to which the interest has changed			Not applicable
Interest acquired			Not applicable
Interest disposed			Not applicable
Value/Consideration Note: If consideration is non-cash, provide details and an estimated valuation			Not applicable
Interest after change			Not applicable

Part 3 – +Closed period

Were the interests in the securities or contracts detailed above traded during a +closed period where prior written clearance was required?			No
If so, was prior-written clearance provided to allow the trade to proceed during this period?			Not applicable
If prior written clearance was provided, on what date was this provided?			Not applicable

+ See chapter 19 for defined terms.

Appendix 3Y Page 3    01/01/2011