I have damage like in the picture. The terrace was previously open but has been furnished. The foundation is insulated with styrofoam, followed by chipboard and flooring. My idea is to prevent frost damage in the substrate. Considering cutting off the tiles along the entire length and casting with cement in the gap along the whole. I don't want to just patch where it's cracked, as it needs to look nice. Probably should be cast with a slight slope outwards, maybe a slanted edge between the cut tiles and the edge they rest on. Any tips?
