Stone facing attachment on ICF wall
What is the best way to affix natural stone to an ICF wall? We have designed a walk-out basement home with ICF on the lower level and are planning to to use granite ruble stone from the property to face the walls over the above grade ICF portion. The detail drawings from this site show an air space behind the facing, but that detail was for a stick wall. If we were to use an air void behind the wall how would we anchor it given the significant weight and irregular shape of the stones?