Hello to all that answer my question posted here. I put in a pool over the winter and had to do a retaining wall. Its approx. 3 ft. high and cinder block. I wanted to use "real stone" as a veneer style. (the stones are free) I started laying the stones in November the temp were still in the 40's-50's finished around January. I got all of the stones mortared onto the cinderblock wall. My mixture was 2 shovels of sand and one shovel of N type of Mortar. Mixer mixed. This was amount I could use before it started to set. Well we got an ice storm in late Feb. and my top layer started falling off. Understandably water froze behind and popped them loose. But not all of them. So I was removing them and preping the wall to reinstall and more fell off. The temps are in the 60's-70's now. My questions are: 1. Am I not adding something in my mortar mix (sand and N type mortar)?. 2. Was it just too cold if so why are they still falling off and its 70 degrees? I posted some photos of the situation, the numbers on the wall are so I could remount the right stone in the right spots. I'm a homeowner doing it my self. Thanks for the answers and reviewing my problem.
