Walls are not damp to my knowledge. Walls are just old with a render coat and what seems to be rolled on and left plaster coat.
They are external facing walls which is why I thought rendering would be better
I'm really stuck on a project and finding the right information. I have gone back to brick on a number of walls inside the house where previous render was blown and looking to add a backing layer before skimming walls.
My question is how to properly prepare the bricks before rendering and...