Keeping your pipe seams at the top will prevent moisture leakage in the house. Small sheet metal screws are acceptable with bath vent pipe, but the aluminum tape works fine without them.

It's also a bad idea to use an existing roof vent for bathroom exhaust. You'll partially block the vent with the duct pipe, reducing the flow of cooling air through your attic. Moreover ...

【Anti-corrosion Material】This roof vent cap is crafted from high-quality iron, featuring a black coating on its surface. This effectively isolates the vent from the external natural ...