[trekkor]

The pre-mixed mortar has no acrylic. You'll need to add your own.
Most people do not use it at all.

When you 'wash' your grout that is when you use a wet sponge and clean the wet mortar off the adjoining surfaces of the stone.

There will be no buttering of the stones ( jedi hand wave ).
Mark around the stones while they are sitting on the slab before you apply any mortar. Like one of those crime scene body chalk outlines!
Apply your mortar inside you lines.

Do you have your flagstone? Unless one side of it is 'guaged' or flat from the quarry it will be varying in thickness. If not, it is OK to set either side up. ( there is no top or bottom )

Variations of 3/4" to 2" are not uncommon...On the same piece at times!

It's time consuming HARD work. DO NOT RUSH!!

The Makita hand held diamond saw has no place on this job. Save it!
An angle grinder or Skil saw with a dry diamond blade is the way to go.

You'll need a 'rock hammer'. It has two ends.
One end has a square, heavy head for breaking and the other has a long flat blade for chipping or splitting pieces.

Also, let you slab cure out for a couple more weeks before doing anything.


KT