What’s the difference? Always used hardie backer.What’s the difference between 1/4” and 1/2”?Also, under the removed tiles on the ground, is some sort of thin plywood (which is on top of 3/4” plywood). Do I have to remove it or can I apply the hardie backer right on top? Mortar between wood and hardie backer?https://ibb.co/dLg4Yy8 via /r/DIY https://ift.tt/2JEdRg3
