This document summarizes a webinar about building defects and how to determine liability. It discusses the key parties responsible for defects, including builders, subcontractors and designers. It outlines important factors to consider such as when the defect became apparent, warranty periods, and jurisdictional bodies to handle claims. Case studies are presented where expert determination of the defect source helped achieve resolution with the responsible party rectifying defects in a timely manner without excessive legal costs. Managing risks through standards, contracts and expert guidance is advised.