PARIS, Feb 26 (Reuters) - French construction materials company St Gobain said it had signed a definitive agreement to buy Australian peer CSR Limited in a deal with an enterprise value of A$4.5 billion ($2.95 billion).

St Gobain said it was offering A$9.00 for each share in CSR Ltd, adding the target company's management favoured the deal.

($1 = 1.5263 Australian dollars) (Reporting by Sudip Kar-Gupta, editing by Tassilo Hummel)