All work required to be completed by the Contractor in accordance with this Clause 25 in order to remedy any Defects or damage consequent to any such Defects (to the extent, in the case of damage, that the costs are not recovered under any insurances) shall be carried out at the risk and cost of the Contractor, other than where arising as a result of normal wear and tear or the Owner's failure to the extent that the Works have been the subject of improper operation or maintenance