[Merl Pritts]

I live in a cement block house from the mid 50's. There is 12" of insulation in the attic. Interior walls are studded, plasterboard then full plaster. Exterior walls are furred and aluminum siding. Walls get warm in summer and transfer inside and opposite in winter. I want to remove aluminum siding and furring, install 1 1/2" rigid insulation, house wrap, furring then insulated vinyl siding. Is all this going to be worth the time and cost of keeping the house cooler in summer and warmer in winter? Should I just take off the aluminum siding and replace with vinyl? Windows were replaced last year with dual glazed, argon gas filled, E glass. That sure helped this winter. Thanks for any feedback.