If you ever find yourself using the words:
"While we're at it, we might as well..."
Stop immediately, close yer trap and move on.
We finished that statement with "check into insulation" and thereby were doomed. Come on a journey into remodelling hell. It's been 64 days since a simple installation of RetroFoam insulation went horribly wrong. So far, we lost the kitchen drywall on the exterior walls entirely, paid $1700 for plaster repairs, $1100 for drywall removal, need to pay a stone fabricator and have about $3600 left to pay if the lastest budget holds. It doesn't include whatever else may be wrong in the house but it does include re-installing my kitchen sink.
