 |
 |
| The tub itself must sit on a single solid surface. Concrete! The reasons for this are stability and settling. Over time, everything settles slightly but if a concrete pad settles it will remain flat. If a tub is set in gravel, or on slabs or pavers, it is possible for just one corner to settle putting undue stress on a single area of the hot tub spa, causing possible structural damage or cracks in the shell or surface. This would not be covered under warranty by the Manufacturer. Depending on ground conditions, topsoil is usually removed to the depth of a spade to reach undisturbed substrata such as clay or chalk. A layer of hard-core or similar material then needs to be compacted to a depth of 100-150mm. On top of this, a concrete slab is formed to suit the size of the spa - normally 3" larger all the way round is ideal. The thickness of the slab can vary, but is typically between 100 & 150mm and sometimes lightly reinforced. If in doubt, consult a local expert. Remember, the average filled hot tub spa weight can from 1500 lbs (680 Kilos) to around 5000 lbs (2300 Kilos). |