DIscovered new problem that the kitchen never had venting for the stove, so some dry rot has started see last photo. Smells sort of sweet the rot, any idea what to treat it with ? beside air and the dehumidifier. I guess paint. Problem is compounded because owner put 2" foam board on the kneewalls and osb and dry wall. So the foam creates a vapour barrier and with the roof insulated heat and humidity get tapped in the kneewall top corner and no where to go, which has now created the rot in post in photo3. This hatchways create great air flow but a bit strange don't you think? I've cut one hole on each side should create enough air flow, but i'm tempted to cut a couple more....?