There is an evergreen ivy growing through my fence. We think it has it's roots on the neighbours side, but very low down it comes through the fence and then goes back again. It covers the top of the fence and creeps its way onto the conservatory roof and tries to get in at every point. It can't. Having failed on the conservatory it has now made its way onto the garage roof, where it has found success squeezing in between layers of felt at a weak point and now lets water in, causing a running leak trickling through the ceiling everytime it rains. Obviously when one of us can get on the roof we will cut off the offending tenticle and patch up the felt with a view to a full reroof next year - but my main question is this. Can I cut the plant at the 'trunk' part where it comes through my fence? It has never really been a problem, but out of nowhere it has gone mad and is growing like a thing possessed, we are constantly cutting off tenticles keen on getting in through the roof, just this one escaped out notice under the guttering, and has found a way in. FYI - It is our fence, not the neighbours.