I did have it on the side of my house, I cut the stem where it came out of the ground and was advised to leave as long as possible. I did try to pull it off straight away but found it was pulling the mortar out of the wall. I just left it and it lost all of its strength/grip. One year later it nearly just fell off.
Andy
I do the same. I cut off most of the volume for neatness, but the tiny feet will die, dry, shrivel and weather away. This is also less work and means you do not have to use a ladder.
BTW cut through all the stems near the ground and leave a clear space that you can see all round the house, as your first step, and immediately dab neat Glyphosate on all the freshly cut stems, with a small paintbrush, to kill them. If any still live, do it again after a month. Weedkiller on the leaves is ineffective because they are waxy and not absorbent.
If you leave any of the stems alive, it will continue to grow and you will have to do it again. Tidying up the dead stuff is just for appearance and there is no hurry.