All hot tubs require a firm, level base which is capable of supporting the weight of the hot tub, the water and the bathers with no movement. Dura Deck Tile Resist is a decorative covering for existing hardstanding areas and could work well as a surround for an area with a hot tub because the individual tiles are easily removable to ensure accessibility for pump maintenance etc. However, they will not support the weight of a hot tub being placed on top, so you’ll need to make sure that what is underneath the tub itself is a structural sturdy, flat surface such as a concrete slab that will be able to hold a lot of weight without collapsing. If in doubt, you should consult your hot tub retailer for detailed load calculations for when the tub is filled and at full capacity, or employ the services of a qualified structural engineer.