A 1130 litre Resort size (largest) Softub spa weighs just 70kgs, including the HydroMate and lid. You can place your Softub spa on nearly any deck. Check with your builder; most new decks can easily support a Softub spa and a few of your friends. The Sportster (1-2 pers) weighs just 51 kgs, and the Legend (3-4 pers) 63 kgs.