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 30/9/2001.

Name of entity   James Hardie Industries N.V.

ARBN   097 829 895 Incorporated in The Netherlands. The liability of members is limited.

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   Mr Donald G McGauchie
     
Date of last notice   22 November 2005

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   Direct Interest
     
Nature of indirect interest
(including registered holder)
Note: Provide details of the circumstances giving rise to the relevant interest.		  
     
Date of change   24 March 2006
     
No. of securities held prior to change   3,000 CUFS held by: DG, EC & RE McGauchie as trustees of McGauchie superannuation fund.

3,569 CUFS held by DG McGauchie of which 758 CUFS are subject to voluntary escrow until 22 November 2007 and 1,068 CUFS are subject to voluntary escrow until 4 December 2006.
     
Class   CUFS
     
Number acquired   3,000 CUFS
     
Number disposed   Nil
     
Value/Consideration
Note: If consideration is non-cash, provide details and estimated valuation		   A$9.30 per CUFS.

 

+ See chapter 19 for defined terms.

     
11/3/2002   Appendix 3Y Page 1

 

Appendix 3Y
Change of Director's Interest Notice

     
No. of securities held after change   6,000 CUFS held by: DG, EC & RE McGauchie as trustees of McGauchie superannuation fund.

3,569 CUFS held by DG McGauchie of which 758 CUFS are subject to voluntary escrow until 22 November 2007 and 1,068 CUFS are subject to voluntary escrow until 4 December 2006.
     
Nature of change
Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back		   Market purchase.

Part 2 — Change of director’s interests in contracts

NIL

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

 

+    See chapter 19 for defined terms.

     
11/3/2002   Appendix 3Y Page 2