Yeah the bricks are laid on their edges, don't think it was ever an internal wall though. There are a couple of piers in the loft and the joints run parallel to the wall
I have just found out the side wall to my house is only half a brick thick. I am aware this isn't great for insulation. Is it possible to build up the wall on the outside to make it a solid nine inch wall or cavity wall rather than making loads of mess inside the property?
