Hopefully, this has given you some things to think about when it comes to your plaster walls. It’s already there! It’s always “greener” and cheaper to retain existing elements.Plaster increases the historical authenticity and therefore resale value of a historic home.
Then when the GIs returned home from WWII, the baby (and housing) boom hit America, and there was a huge demand for quick, affordable housing. Not to mention, it required a skilled plasterer to make sure the plaster was properly applied and the wall was smooth and level. The work took a long time and was very labor intensive. The walls of any pre-war house are most likely wood lath like in this picture covered with 3 coats of plaster.