We are trying to get an extractor fan through our roof. Our builder has said to have a look online and I've found these https://www.leadworx.com/shop/lead-roof ... oof-vents/ or https://www.screwfix.com/p/glidevale-un ... ator/1091t
Has anyone used either before. How do you attached the ventilation pipe to the bottom of them?
Cheers
Dan
