Originally Posted by tthomass
The drywall guys put puddy and paint over top of the gray cement board. Problem is mortar doesn't stick to that smooth surface so we had to do what is called a scratch coat around the edge. You take a 1/8" thick metal mesh, nail/screw/anchor it into the wall and apply a thin layer of mortar, allow it to dry and now you have a surface the mortar will stick to when you apply the stone.
Gotcha, thank you and once again looks really sweet.