Question

How do you identify defective materials

Answer 1

It can help you friend (ʘᴗʘ✿)

Answer 2

Answer:

The Guidelines from government...

This guide is concerned with defects that a contractor would be required to remedy if notified within one year of completing the building work. It supports new consumer protection measures that came into law in January 2015.

The guide can help align expectations of the end product, as it covers design choices and chosen materials, finishes and costs. You can also refer to it at the beginning of a project to ensure everyone has the same expectations, and include it as part of a contract

I hope u will understand...