Hartley Interlock

Does good work provided that no problems are encountered. If a problem does occur that involves materials that are required, due to 'unforeseen circumstances' or a matter that he has erroneously overlooked, he will expect you to pay for and pick up the material for him in order to complete the job – and then will only do so at HIS convenience weeks later. Insist that he does his own material shopping and pickup. Do not pay him in full until the job is done properly and to your satisfaction.