Best way to connect bathroom fan's rigid vent ducts?
I'm putting in a new bathroom fan, and since the previous owner didn't have it properly vented, am going to run a long span of rigid 4" metal duct to the outside. Is metal tape enough to join the sections of duct, or should I use sheet metal screws as well?
I know with rigid dryer vent, they recommend not using screws because they would catch lint on the inside, but that shouldn't be a problem on a fan vent. On the other hand, if taping the joints is enough to hold the duct sections together, no need to use screws too.