Masstores (Pty) Ltd engaged Murray & Roberts Construction (Pty) Ltd under a standard JBCC building contract to effect alterations and additions to an existing Makro warehouse at Strubens Valley, Roodepoort. During construction, employees of a subcontractor were cutting the roof of the existing structure with an angle grinder when a fire broke out, destroying the warehouse and its contents. Masstores sued Murray & Roberts for breach of contract, alleging negligent and grossly negligent failures to comply with laws and safety regulations and to ensure safe execution of the works, and claimed damages of approximately R169 million. Murray & Roberts raised an exception to the particulars of claim, relying on clause 9.2.7 of the contract, which indemnified the contractor against physical loss or damage to an existing structure and its contents in respect of which the agreement was for alteration or addition.