What base do I need to provide for a swimspa?

You will need to provide a concrete base 150 mm thick with reinforcing mesh (rebar).

Under no circumstances can a swim spa or hot tub be installed onto decking.

If you are planning an in-ground or partially in-ground installation, you will need to leave 600 mm (approx 2 feet) on all sides of the swimspa for future maintenance access.