I live in a 50 yr old house. There is no insulation in the exterior walls---r-12 in the attic --rockwool
the window screens are covered with visqueen and they fit very tight in the frames, and sitting in my bedroom I can still feel a breeze in here
the windows are double hung single pane but with the screens sealed I cant imagine that much air would travle through them or the walls ....so where is it comming from
do the walls leak that much ? am I feeling the cold air overtaking the warm air?