Use rigid foam insulation, which will provide a thermal break and not trap any moisture. Make sure you Tuck Tape every seam, and spray-foam all corners and joints to create a seal and a perfect thermal break.
In the two-hour special Mike's Ultimate Garage, Mike Holmes has envisioned his state-of-the-art man cave for years, but he's finally ready to make it a reality. How will things go when he turns the jobsite over to Mike, Jr.
Michael Holmes explains the benefits of permitted development rights for homeowners, and Lucy Searle takes us on a tour of a refurbished home with a contemporary rear extension which did not require planning permission