Exhibit 99.1

10 May 2010		James Hardie Industries SE ARBN 097 829 895 Incorporated in The Netherlands with a corporate seat in Amsterdam The liability of members is limited Dutch Registration Number: 34106455
The Manager Company Announcements Office Australian Securities Exchange Limited 20 Bridge Street SYDNEY NSW 2000		Level 3, 22 Pitt Street Sydney NSW 2000 Australia Telephone (02) 8274 5239 Fax (02) 8274 5218 GPO Box 3935 Sydney NSW 2001 Australia

Dear Sir/Madam

James Hardie will conduct a management briefing on its 4^th Quarter and Full-Year FY10 Results on Thursday, 27 May 2010.

Analyst, Investor, and Media briefing:

A physical briefing for analysts, investors, and media will be held at the Museum of Sydney, corner of Bridge and Phillip Street, Sydney. For those who are unable to attend the physical briefing a teleconference and video webcast will be available. Details are:

Time:		10.30am (AEST)
Dial-in:		+61 2 8524 6650
Code for conference call: 73230133
URL: http://www.ir.jameshardie.com.au/jh/results_fy_2010.jsp

Yours faithfully

Sean O’Sullivan
Vice President — Investor and Media Relations