Uninsulated mass buildings could tolerate wetting because of their high drying potential. We had lots of time to get around to fix stuff. But not any more. We are insulating them - and insulating them with not just a little insulation but a lot. And when we do that and don't get the water control right we get ugliness. Yes, we are seeing more and more freeze-thaw. And now you know why. There is no such thing as a free thermodynamic lunch. There are consequences for reducing energy flow.