Boral urged its shareholders to reject Seven Group's (ASX:SVW) off-market takeover bid for all shares it does not own in Boral.

The independent expert maintained that Seven Group's offer remains "not fair and not reasonable," despite a slight adjustment to their valuation of Boral related to potential capital expenditure for Boral's Deer Park quarry.

Boral's bid response committee also advised shareholders to reject the offer, underlining Boral's business performance and outlook for delivering sustainable value to shareholders.

The committee emphasised that accepting the offer would hinder minority shareholders from fully participating in Boral's potential future appreciation as an independent entity.