Exhibit 99.1 11 June 2019 James Hardie Industries plc The Manager Europa House 2nd Floor, Company Announcements Office Harcourt Centre Australian Securities Exchange Limited Harcourt Street, Dublin 2, D02 WR20, Ireland 20 Bridge Street SYDNEY NSW 2000 T: +353 (0) 1 411 6924 F: +353 (0) 1 479 1128 Dear Sir/Madam Substantial Holding Notice As required under ASX Listing Rule 3.17.3 please see attached a copy of the substantial holding notice received by James Hardie on 10 June 2019. Yours faithfully Natasha Mercer Company Secretary James Hardie Industries plc is a limited liability company incorporated in Ireland with its registered office at Europa House 2nd Floor, Harcourt Centre, Harcourt Street, Dublin 2, D02 WR20, Ireland. Directors: Michael Hammes (Chairman, USA), Brian Anderson (USA), Russell Chenu (Australia), Andrea Gisle Joosen (Sweden), David Harrison (USA), Persio Lisboa (USA), Alison Littley (United Kingdom), Anne Lloyd (USA), Rada Rodriguez (Sweden), Rudy van der Meer (Netherlands). Chief Executive Officer and Director: Jack Truong (USA) Company number: 485719 ARBN: 097 829 895