Posted: 05/03/2017 at 13:39
I agree with Bob. I have Boston Ivy, which isn't an ivy, it's a smaller cousin of Virginia Creeper (think that was mentioned). I also have a grapevine. The grapevine looks totally dead at the moment, but I know it isn't. The leaves are late to come out. Too late to prune now, the sap is rising.
So, if it is an ornamental grapevine, I would be inclined to leave and see what happens. Be grateful it isn't a Boston Ivy, I have to get a man in to stop it growing on the roof, I don't like heights.