How do I install cultured stone on the exterior of the home, and what are the steps to mix the morter?

Question

Someone has already started to do the work and the home has been partially stoned. The mesh has already been installed, I am more interested in the steps on how to mix the morter, what do I need to mix with morter, best type of morter to use and how to actually apply the stone to the wall? Thanks for your help!

Answer 1

You want to use a cement mortar, basically portland cement, sand and water. You can buy it by the bag or mix it yourself (I suggest buying by the bag). Since the metal lathe is already in place, your next step is the scratch coat. Mix the mortar in a wheelbarrow with the consistency of a thick milkshake and spread it over the lathe. Let it set up till firm then scratch the surface with the notched edge of the trowel. Let set overnight.
When applying the cultured stone, mix the mortar to the same thick milkshake-like consistency, butter the back of the stone, press firmly into the scratch coat and hold it a few moments, give it a final twist back and forth and remove your hand slowly. If the stone falls, the mortar is too thick, add a little water and try again. After the first few courses, you will see what kind of consistency works best. This is going to be messy, so cover any areas you don't want mortar on, with a tarp. And keep a stiff bristle brush handy to clean off the stones you've already laid (after they have set up sufficiently).

My suggestion is to do a small 5'x5' area first, let everything set up for a day or two, see how it turns out, then decide if you want to continue yourself or hire someone else.

Good luck with your project.