I have an older patio, 15' x 18', that is made from old solid bricks. It looks like it was set in sand and has been fine for years. Had to run a skid steer across it to remove a tree that had to be cut down and it left some depressions.
I am planning to pull it all up and put them back tighter(there is about a 3/8" joint now) and add maybe 125 more brick.
I talked to a few different masons and was told just tamp the base well, then set them in sand again. But 2 different guys said mix portland cement with the sand(dry) before setting the bricks.
Any advantage(or dis-advantage) to using a cement/sand mix?