Andrew Pae
Hi Alicia, I would suggest a Roofer as the ducting will require connecting to an external outlet, preferably a roof tile vent. Roofers generally have the access equipment and knowledge of the correct vent tile to match existing tiles. If you use your bathroom and the extractor fan cuts in, it is just sending the warm and moisture into the roof space, which in the colder weather will cause a build up of condensation. hope this helps. Andrew.
