Bruce Tanner wrote:

wrote in message
news:c9bc8ce2b54805fe2bd42fc36504406d@localhost...

Do I need to replace the spalled bricks? Or can I repatch them?

You could hack out the mortar around the bricks, turn the brick
round and re-mortar - that way you won't have to find matching
bricks

I've heard of this trick before, but given that the affected bricks are
evidently susceptible to spalling, isn't it wasted effort to re-use the
same bricks? Just wondering.

David