That will be a very nice large workshop when insulated and finished. Your wifes main problem will probably be in trying to get you out of it!! I have an insulated sectional panel up and over door which is absolutely brilliant, although it does restrict headroom in the doorway area. These doors are very strong (40mm foam sandwiched by ally sheets) and seal very well. I am sure it will all work out well for you. Good luck.G.