Regularly track construction.

Carefully coordinate the estimate with the contractor, from the purchase of building materials to the cost of the work performed. Be sure to write the liability of the parties in the contract in cases of violation of the terms of the contract of one of the parties. Control the quality of building materials, certificates for woody wood purchased. Regularly track construction. Then you do not have to spend strength, money on proof of the dishonesty of the contractor, and the correction of the marriage during construction.