What is the total height of the mat and thinset below a 1/2″ thick stone floor?
We recommend using a 3/8 inch x 1/4 inch trowel to apply the thinset over the mat and by the time you have finished, you will be approximately 1/4 inch over the backerboard which is usually 1/4 to 1/2 inch thick. For perimeter areas where there is no SunTouch mat, you will simply apply a slightly thicker layer of thinset.
