I got a builder to do all the external work on our loft conversion. I've just about finished the bedroom (insulation, walls, plaster, floorboards) and I'm moving onto the small shower room. I need to get the soil pipe through the dormer wall - it is already been tiled on the outside. The only product I can find looks like it should have gone in and been tiles around. Does anyone know of a decent way of doing this without ripping the tiles off and redoing it...