458. Liability for want of skill.

The relationship between the architect or engineer and his client is primarily contractual. Thus, the duties to be performed by the architect or engineer will principally depend upon the express or implied terms of the contract in question. However, it is clear that professionals generally owe a parallel duty and undertake a concurrent liability in tort1. Moreover, certain duties are customarily performed by competent experienced architects and engineers2.

The test of whether the architect or engineer is in breach of his duty is whether he did or did not exercise the skill and care to be expected of an ordinary