Why are both exterior and interior walls constructed of concrete block in my home?
My house was also built around this time, and I have concrete walls under the tiny bed of sheetrock and paint. Back then materials as such were not as expensive and there was more of the material source, thus they used those source materials. As the country grew in numbers (people) certain materials became expensive and may have taken too long to set, so they went with the cheap route of using wood, thus making building a house much faster as well with putting little to no heart in the work. I'm proud to have a house built by a Masonry and for me I find it much safer, having a fireplace and all that could start a house fire if not properly cleaned/maintained. The above statements are merely more of an observation/my thoughts. Here is a link that might interest you. Why Concrete?