In the rear of my home, there is a patio area that was constructed when the home was built, and sits on a concrete pad with a foundation below.I had exterior ceramic tiles installes on top of the concrete to form a nice patio area. Adjacent to this is a flagstome patio area that surrounds my pool, and butts against the ceramic tile area. Although there is wire mesh etc. below the slab that the flagstone sits on, there is no foundation below, and presumably moves as the ground thaws. The problem is that the flagstone area is moving, and the ceramic area is not. I wonder what I can place between the flagstone and ceramic that would be flexible so that when the flagstone area moves with a thaw, it can do so freely, and not affect the ceramic area?
Answer:
The best you're going to do here is to introduce an expansion joint. That means you can cut out a stip of the moving portion and fill it with decorative gravel or some such and just let it keep moving because you'll not be able to seamlessly marry the footed deck to the one that shifts with the season.
