You mentioned using a vinyl vent hose - The current one is vinyl (white plastic 4" dryer hose)and runs under the fiberglass insulation to an exterior vent - Does this sound okay? Also, given that the bathroom ceiling is wood lath plaster with a newer layer of 1/2" drywall on top, do you see any need to repaint the ceiling with a paint designed to act a vapor barrier? Do I need to try to remove the frost in the attic (using a heater/hairdryer) or should I just let it dissipate on it's own?
Finally, it turns out that at least half of the soffit vents are currently blocked with fiberglass insulation (which I plan to clear)- How will I know when I have adequate ventalation? Should I keep the gable end windows partially open through out the year?
Thanks for all your help.