I am currently building a 2-storey extension to my cottage. I am using reclaimed hand-made bricks. So far only a small pillar of brickwork has been built. However now it has stood a couple of weeks the brickwork has got white-stuff on it - now I have seen this white marking on new-builds and always thought it was the salt being drawn out of the bricks. I thought it was something to do with modern bricks so was surprised to see it on my reclaimed brickwork. Does anyone know if it could be something to do with the lime used in the mix or is it salt and most importantly will it go over time?
Many thanks
Many thanks