Home renovation commences with a structure that may have endured decades, often concealing issues stemming from the passage of time, weathering, aging materials, and other factors. Renovators must grasp and implement building science principles in every project they embark upon. Developed as a complementary guide to the Builders’ Manual, this inaugural edition of the Canadian Home Builders’ Association Renovators’ Manual delves into the application of building science for renovations across a diverse range of scenarios.