My house has vinyl siding. If I want to hang something on an exterior wall, can I just attach it with screws drilled through the siding? Or do I need to do anything to prevent water from seeping in around the screws?
The siding needs to remain free to expand and contract. So cutting at least a slot , then hanging something through that would work, but would be unsightly, and would leak water through the hole. So I think that finding some kind of gasket or trim piece (such as is found where your vents protrude through siding) and trimming with J-channel all around it would look better and would be less prone to leaks.