I have a walkout basement where one side is an exposed concrete wall. I would like to insulate this wall and was wondering if anyone has any ideas. Is there any kind of product out there like 1/2" insulated siding board, or am I stuck with styro foam insulation and regular siding over that. I was told they don't sell the wood siding I have on the rest of the house, I think it's called T1-11, so I can't match it? Maybe there is some kind of insulating stucco? Thanks.