Question about brick

[mcyr (Marcel Cyr, CMI)]

Here is info for you to start.

Why do brick spall?

Thanks, Michael–most informative. I’ve never really wondered why bricks would spall, though I have seen it on many occasions, but now that you have explained it so well, I think I will start wondering–and now I know why. Thanks again. I can pass on this info to others and, boy!! will they think I’m smart!!!

Common Causes Of Spalling Bricks & How To Fix Crumbling Masonry.
Technical Notes - Technical Resources - Brick Industry Association