A point often overlooked is that since it s winter the water freezes on the cold nails.
Frozen condensation in attic.
The tips of the nails are supposed to penetrate through the wood on your roof.
Moisture forming on the glass window panes or other flat surfaces.
Traces where water has trickled down the walls.
Noticeable musky damp odor.
The warm moist air trapped inside of your home is coming into contact with the cold wooden surfaces in your attic forming large damaging water droplets.
If there is a condensate trap insulate it or just remove it since it probably just runs outside from an attic space.
A tool like this shoots nails through shingles.
The air in the attic has water in it and it condenses on the cold metal.
Condensation forms on the outside of the glass where the cold glass is coming into contact with the warm humid air.
Recognize the signs of stress when too much snow and ice has accumulated on your roof or when you have too much condensation in your attic.
The same thing may be happening on the inside of your attic.
Well just like any drain line the water should exit the drain and there should be no concern about freezing.