Hairline cracks in my mortor between Flagstone
First I want to thank you for taking the time to review this question. Thank you!
I'm finishing up a flagstone project here in Tucson, Arizona. I've laid down flagstone on top of concrete. So I have a great base - also, it's set on the rather hard ground here in Tucson. I'm using premixed mortar to fill the grout lines. I've bought the 'Profinish Quikrete' at Home Depot. I'm having some issues with hairline cracks that will run along the edge of some of the flagstone. I've been spraying a mist of water in the cracks before I up the mortar in. BTW - I have mixed the mortar to a pudding/pancake batter consistancy.
Wondering if I should add something else (some additive) that will help it "not" to crack.
Lastly - temps have been in the 50-60 degree range and 40's at night.
Thanks in advance for any assist you can offer on this.