See the Wallbarn rail substructure system for laying porcelain tile floors. Improve the lateral stability by linking pedestals together and reducing movement of the surface. Telescopically adjustable height pedestals support the structure, the profiled aluminium rail holds the frame together and top headpieces can be slid along the rail to give the ceramic tiles proper support in the correct position. Surface drainage is improved, the rainwater drains between and beneath the tiles. Slip hazards and trip hazards are avoided. Tiled decks are constructed quickly and easily without the need for mortars or slurry and without mechanical fixings. A superior and very durable finish is achieved.