Lafarge North America Inc.’s board has appointed a special committee to review the proposed tender offer by majority shareholder Lafarge SA. The committee members are unaffiliated with Lafarge SA, which has offered US$75 a share for the 46.8 per cent of Lafarge North America it doesn’t already own. In a press release Wednesday, the construction-materials supplier said the committee will review and consider the proposal and will make a recommendation to stockholders. The offer represents a 17 per cent premium over the unit’s closing share price Friday. Lafarge North America shares rose 13 cents, or 0.1 per cent, to US$82.01 in recent New York Stock Exchange composite trading.