We've got some damp into the upstairs bedroom and I looked about it looks like we've some crack/damage to the parapet wall you can see in the top part of picture which I think might be contributing. What do you think is the best way to repair this? Could you just fill the crack with render and maybe render the top line of bricks or do you need to rebuild it again. I don't really want to put flashing tape over it as it will look like a bodge job as you can see it from street level.