I have a new home with vinyl siding. The contractor did not put anything between the vinyl siding and the chip board. I noticed a water spot on my ceiling and when I went into the attic, the outer wall was very wet and the blown in insulation along the outer wall was very wet. What happened? Would tyvek have prevented this? It has been really cold for the last month. Will the insulation dry out? My son and I have allergies and mold and mildew are the worst!!! Please help me. The contractor is coming over tomorrow and I would like to be prepared with questions for him. Someone told me that a house wrap was required under vinyl siding? Please help!!!!!