Venting range hood out roof
I'm in the process of installing a range hood in our kitchen. It used to have what I think is called a gravity vent (aka a hole in the ceiling). All I have left is to install the duct work in the attic.
When we had the roof re-done this past summer, I had the roofers install an extra T-top in the vicinity of where the range hood would be coming through. The only problem I have now is that there isn't any sort of duct sticking through the roof to connect the 6" duct to.
There is what looks like a piece of window screen covering the opening and keeping out bugs/animals. Should I remove the screen and somehow attach the duct to the underside of the t-top with caulk or something else? There is a damper at the hood itself, if I remove the screen at the roof, do I need to worry about critters?