We are gonna have to agree to disagree on this one. I have built them with mortar, as you suggest. I didn’t recommend to the homeowner to do so and tried to talk the out of it. I have also built them like this as dry stack. Haven’t gotten any call backs for any of them. These problems we are talking about aren’t gonna show up till the next homeowner buys this place anyways. Not saying I’m want to do things wrong, I just don’t think these things are as bad as building a wall that’s gonna get water in it.