I have just purchased a home located in Toronto Ontario. It was built in around 1952, and is constructed with a cinderblock foundation topped with a peculiar type of "frame/siding". The outside walls are actually formed concrete slabs, about 15" in width, and about 8 feet in height. Has anyone heard of such a system?? There are about 20% of the homes in the area with the same construction type. Does this type of construction have limitations for applying siding in the future? Currently, I cannot find out if the walls are insulated. The interior has very few electrical outlets, and I cannot verify the existence of any insulation. What gives???? Very much appreciated.