311. Excuses for non-performance not amounting to frustration.

Liability in contract is strict and an unforeseen event short of frustration will not normally excuse a failure to perform a contract. Where the contractor's costs greatly increased because of inflation but the contract did not enable all the increase to be recovered, there was no frustration1. In the absence of an express provision entitling the contractor to an extension of time, bad weather will not excuse late completion2. Again, in the absence of an express provision, a strike causing a failure to complete by a fixed day is immaterial