How do I pay the manufacturer?

It is important to know how important the right financial arrangement is, which you will agree with your manufacturer. It is recommended that the payment be made gradually and in accordance with the progress of the work. It is in your best interest to sign a well-worded private contract and to be present during the installation of the frames.
This document should explicitly state all the terms of the agreement and in particular should provide for a penalty clause due to delay.

In no case will the amount be reimbursed if they arise, deviations in the quality and specifications of the ordered products and materials, as well as inability to repair any defects.