Rinker board recommends shareholders accept the higher offer in the absence of a superior proposal

West Palm Beach, United States of America – The directors of Rinker Group Limited (“Rinker”) 2007-04-10 announced that CEMEX S.A.B. de C.V
(“CEMEX”) has agreed to lift its cash takeover offer from US$13.00 to US$15.85 per Rinker ordinary
share. The higher price represents an increase over the original bid price of US$2.85 or 22%, or an
increase of US$2.98 or 23%1, assuming CEMEX had exercised its right to deduct the 13 US cents
interim dividend1 (for the year ending March 2007, or YEM07) from the original offer price.

For American Depositary Receipt holders, the higher offer represents US$79.25 per ADR – US$14.90 or
23%(1) above the initial CEMEX offer.

The higher offer is equivalent to A$19.41(2) per Rinker ordinary share at the current A$-US$ exchange
rate, or A$3.65(1) above the initial offer. It is within the US$15.85 – US$17.74 valuation range of the
Independent Expert’s Report, included in the Target’s Statement distributed to shareholders in November 2006(3).

The increased CEMEX offer represents:

• a 40% premium(2) to the Rinker A$ ordinary share price on 26 October 2006, the day before CEMEX launched their takeover bid;
• a 50% premium to the ordinary share price, calculated in US$, on 26 October 2006(4);
• a 48% premium to the US ADR price on 26 October 2006;
• a multiple of 10.4x EV/EBITDA (based on EBITDA for the 12 months to 31 December 2006)(5), and;
• a 5% premium to the closing share price on 5 April 2007, before the Australian Stock Exchange closed for the Easter break.

In relation to the Rinker YEM07 interim dividend of 16 Australian cents/13 US cents(2) per ordinary
share (80 Australian cents / 65 US cents per ADR(2)), which was paid on 11 December last year,
CEMEX’s initial offer entitled CEMEX to deduct dividends paid during the offer period from the offer
price. However, CEMEX has agreed not to reduce the higher US$15.85 offer by the amount of the
interim dividend.

CEMEX also announced its intention, subject to obtaining any necessary ASIC modifications or
Takeovers Panel approval, to give existing shareholders (for ordinary shares purchased prior to
today’s date), the option of a fixed Australian dollar price of A$19.50 per share, for their first 2,000
ordinary shares.

CEMEX has also agreed to waive all conditions to the bid, except the 90% minimum acceptance
condition. If the required level of acceptances is not reached, the offer will lapse unless this condition
is waived. CEMEX has described the offer as “best and final”, in the absence of a superior proposal.

Any Rinker shareholders who have already accepted the initial CEMEX offer will be eligible for the
increased offer consideration announced today.

Rinker directors concluded unanimously that it is in the best interests of shareholders to recommend –
in the absence of a superior proposal – that shareholders accept the increased CEMEX offer. Rinker
directors intend to accept the higher offer for their own Rinker shares, in the absence of a superior
proposal.

Rinker chairman John Morschel said: “This recommendation has been made after careful consideration
of available alternatives, and was not taken lightly. Over the past five months, Rinker directors and
senior management have reviewed available options, with one objective in mind – to maximise value
for shareholders.”

He said potential alternatives included transactions with industry participants and private equity
investors, as well as a corporate restructure, involving the potential demerger of Rinker’s Australian
subsidiary, trading as Readymix, and the re-domicile of Rinker to the US.

”Despite the temporary downturn in US residential construction, Rinker’s profit result for YEM07 is
expected to be within the guidance previously advised to the market. Whilst Rinker directors remain
confident about the long term prospects of the Rinker business, the impact of the downturn on the
current financial year (YEM08) is difficult to predict,” said Mr Morschel.

“In light of the above, and following evaluation of the available alternatives – including relevant
regulatory, timing and other execution risks – directors concluded that, in the absence of a superior
proposal, the higher CEMEX cash offer represents the best risk-adjusted return for shareholders.
Directors also took into account that if the CEMEX offer was withdrawn, the Rinker share price may
fall,” he said.

“On behalf of the directors, I would like to thank our employees for their exceptional performance in
delivering Rinker’s outstanding results in the four years since the demerger(6). This has seen our A$
share price increase almost 295%, with a total shareholder return of 332% over that period(7), and
created the value that CEMEX has recognised with this takeover bid. I would also like to thank our
shareholders for their loyalty, support and encouragement.”

The CEMEX offer is currently scheduled to close at 7.00pm (Sydney time) on 18 May 2007 and 5.00am
(New York time) on 18 May 2007, following a further extension announced today.

Full details of CEMEX’s higher offer will be set out in a fourth Supplementary Bidder’s Statement,
expected to be mailed to shareholders shortly. The Rinker board’s recommendation in relation to the
higher offer will be issued in a Supplementary Target’s Statement, which will also be mailed to
shareholders. Shareholders are encouraged to read both of these documents and, if they consider it
appropriate, seek professional advice before deciding how to respond to CEMEX’s higher offer.

If they have any questions, Rinker shareholders should call the Rinker Shareholder Information Line(8) during normal working hours on 1800 285 948 (toll-free in Australia), +61 2 9207 3855 (outside Australia) or 1 866 454 3170 (toll-free in the US).

A copy of the Bid Agreement between CEMEX and Rinker will be separately filed with the ASX.

Notes

or the negative thereof or comparable terminology. Such forward-looking statements are not guarantees of
future results or performance and involve risks, uncertainties and other factors, including: the general economic
and business conditions in the United States and Australia; trends and business conditions in the building and
construction industries; the timing and amount of federal, state and local funding for infrastructure; competition
from other suppliers in the industries in which Rinker operates; changes in Rinker’s strategies and plans
regarding its ongoing business strategy, acquisitions, dispositions and business development; Rinker’s ability to
efficiently integrate past and future acquisitions; compliance with, and potential changes to, governmental
regulations related to the environment, employee safety and welfare and other matters related to Rinker;
changes in interest rates, weather and other natural phenomena, energy costs, pension costs; healthcare costs;
outcomes of legal hearings such as the Lake Belt challenge and other risks and uncertainties identified in our
filings with the Australian Stock Exchange and the SEC. Rinker can give no assurances that actual results would
not differ materially from any forward-looking statements contained in this communication, particularly in light of
the many risks and uncertainties regarding the Offer. None of Rinker, Rinker’s officers, any persons named in
the Target’s Statement with their consent or any person involved in the preparation of the Target’s Statement
makes any representation or warranty (express or implied) as to the accuracy or likelihood of fulfilment of any
forward-looking statement, or any events or results expressed or implied in any forward-looking statement,
except to the extent required by law. You are cautioned not to place undue reliance on any forward-looking
information.