Any insulated siding should suffice. Vinyl siding with a backer board or insulation should make the room usable.
Hardie Siding is effective as well as it is more durable but is more expensive.
Make su ... read more
Dan, Both Hardie Plank and a 3/4" and 1.5" insulating foam board are good options. There is also the choice of using Insulated Siding that is a custom contoured foam backer. It fits to the specificati ... read more