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I think a lot more info needs to be obtained before a good fix can be recommended. An 1 1/2" hi-r value sheating (DOW is excellent) possibly would be a good remedy for retaining heat. What you really need is a good thermal break between you and the outside. The higher the density the better the r value, also the higher the price. Concrete block on the other hand is great for heat/ cold conduction. You need to break that continuity. On a block wall I question how much value a house wrap would give you. This product is mainly used for air infiltration problems.
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