Nah, sorry. So far I’ve only been living in houses made from stone and concrete, I have no experience with improving insulation in framed buildings. Someone else, maybe. Sound like just adding insulation isn’t a great idea though as that will push the dew point into the wall. You’d have to separate the insulation layer from the humid air inside at the same time, otherwise you’d just get the water in the insulation and therefore wet insulation and mold.