The decision jeopardises a string of other international deals involving the sale of parts of the combined business.
The letter says that the Holcim board challenges the financial terms and governance structure of the proposed merger of equals.
Lafarge’s board said that it remains committed to the project that it intends to see implemented. It has indicated that it is willing to explore the possibility of a revision of the parity, in line with recent market conditions, but that it would not accept any other modification of the terms of the existing agreements.
Got a story? Email news@theconstructionindex.co.uk