Can someone explain why any mason would fill control joints with mortar?
Did a commercial inspection of a 20 year old post office…buiding was comprised of a double wythe masonry walls, 12" block and 4" brick veneer.
They tooled the joint to make it appear to be an expansion joint, but it appears to be mortar…doesn’t make any sense to me?
It’s as hard as a rock…could it be a sealant that has just hardened?
Joints occur at every window…about every 20’ or so around the entire building.