said by Jack_in_VA:Any houses built from about 1960 on are garbage compared to those prior to that. Even though they were not as energy efficient as electricity, fuel oil and gas was a cheap commodity so it didn't matter then. The construction and materials were far superior to later construction.
Faults from houses in those days are manageable. Over the years they needed to be renovated anyways, so chances to upgrade the insulation in the walls and the furnace equipment HAD to be changed anyway to today's 90%-95% efficiency.
In my 1964 house, I was able to "energy efficiently" put my attic insulation higher than code (I'm at R55) and basement (R27).
I was able to properly seal most of the duct work and also notice that is hasn't shown any signs of corrosion.
What you can't change during routine renovations are the "bones" of the house (Foundation, structural beams, brick siding, etc).
I love my 1964 house. I can see the bones of it while I'm redoing the basement and insulating my attic. They look just like new. In 46 years, the electrical panel still shows no sign of rust.
If in 46 years there has been no structural problems due to construction defects, then there will never be problems like that.