Builder's Use of Inferior Materials Constitutes Breach of Contract

A builder contracted to construct a building with materials specified in the contract; however, the builder used cheaper, inferior materials without the owner's consent, resulting in structural defects that necessitated demolition and reconstruction. The court ruled that the builder's use of non-conforming materials constituted a breach of contract, justifying the owner's demand for rescission of the contract and full compensation for the damages incurred, including the costs of demolition and reconstruction, as the agreed-upon work was not performed.