I have a client that has this white substance on the north side of the home. It is a brick veneer home. We have had a few major downpours. They are concerned about mold. I am not a mold specialist and had no mold training. (geuss I should get some).
Anyway, the white substance is at the base of the wall and the ground is covered by rock which more than likely has a plastic weed barrier beneath it. I am guessing that water ponds in this area when the rain comes down real hard. I am just wondering what else it could be i.e. salt or mineral deposits or efforfecence? I do not believe thare is anything on the inside, but when I inspected this home in mid August there was none of this on the brick veneer. Anyway, look at the picture and if anyone has an idea please comment. Thank you in advance