Adding a ventilation fan to the bathroom is a great idea and worth while addition to your bathroom remodeling project. But all that air has to go somewhere. The most obvious exit for all that air is out the roof – just run a venting hose or tube through the roofing and the problem is solved.
But what if your roof is still in good shape. You wouldn’t want to start cutting holes in a perfectly good roof just to vent a bathroom fan. Well, there are some options, and of course there are local codes to get in the way of those options. See how one homeowner dealt with the problem of venting the bathroom fan.