Metal expansion joints allow expansion and contraction movements in floors and are are essential when laying floors which are regularly subject to expansion/movement. They are especially suitable for large surface areas, along the movement joints in the concrete slab to absorb expansion and/or contraction movements and deaden vibrations.Expansion joints in aluminium create elastic joints during the laying of ceramic tiled floors which are subject to foot and vehicle traffic whereas stainless steel expansions joints create elastic joints during the laying of ceramic floors which are subject to intense foot and vehicle traffic.