Need advice/options on flat metal roof.
My house has an add-on in the back. I think it was some sort of pre-fab thing, it has thin metal exterior and a metal roof. We had the interior walls redone and re-insulated, and new vinyl windows put in , but it's still way colder in winter and hotter in summer. I just had a new a/c and furnace installed and they ran a vent into that room. But even with the interior door and window to it left open it's 10 degrees colder than the rest of the house. (and that's with a space heater in there) So I'm thinking it must be that the roof has poor insulation.
I didn't know you could get pvc or foam put on these roofs (are they the same thing?). Seems like it would fix the insulation problem. The room is 13 feet by 17 feet. I live in Fort Worth, TX and would appreciate any recommendations.
Here are some pics: