Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside.
Exhaust fan venting into attic.
Installing a vent hood on the roof.
As warm moist air moves through a fans vent system in the attic the duct often become cooler especially in the winter thus condensate may form and drip back down through the fan itself.
Start in the attic and drill a hole through the roof in the desired vent location.
No you cannot vent your bathroom exhaust fan into the attic.
The correct way to vent a bathroom fan through an attic is to terminate the vent either to the roof or to the gable wall.
Apply asphalt roof.
Attic ventilation fans help cool air your attic by pushing out the stifling hot air from inside the attic and bringing in cool air from outside.
Either way the vent will have to go directly to the outside and installed with a vent hood cover.
Venting a bathroom exhaust fan into your attic is never a good idea here are three better options.
You should never exhaust the bathroom fan directly into the attic.
2 moisture droplets dripping from the exhaust fan or ducting.
Vent exhaust fans through a roof hood roof vent hood details.
Condensate may also be dripping off the exterior surface of the vent duct in attic or crawl space.