What base does a hot tub need?

A hot tub is one of the heaviest things you’ll ever put in your garden. Getting the base right before delivery day saves a lot of trouble later, so here’s what it needs and what to check.

Why the base matters

Water weighs about a kilo per litre. Many family-size hot tubs hold somewhere between 1,000 and 2,000 litres, so once it’s filled and people are sitting in it, a hot tub can weigh well over a tonne, spread over a small area.

If the ground under it sinks, even slightly, the shell can twist. That can lead to cracks, leaks and doors on the cabinet that no longer fit. The fix is almost always the same: a base that is flat, level and solid.

The usual answer: a concrete base

A properly laid concrete slab is the most reliable base for a hot tub. It doesn’t move, it drains well and it lasts.

We build concrete jacuzzi bases ourselves, so if you’re buying a hot tub from us we can prepare the base before delivery. One team handles the base, the delivery and the set-up.

If you already have a patio or paving, it may be suitable, but it depends on how it was laid. Ask us and we’ll take a look.

Roof terraces and decking

A hot tub on a roof terrace, balcony or raised decking needs extra care, because the structure has to carry the full weight. In these cases, ask a structural engineer to confirm it can take the load before you buy. We’d rather tell you that now than after delivery.

Electrics

A hot tub needs its own electricity supply, protected by an RCD, and installed by a qualified electrician. Plan where the cable will run and where the hot tub’s control panel will sit. We can tell you exactly what the model you choose needs.

Getting it in

Before delivery day, measure the route from the road to where the hot tub will sit:

• Gates and gaps. A hot tub is usually carried on its side, so the narrowest gate, gap or corridor along the way matters most.
• Steps and slopes. Note any steps, tight turns or steep paths.
• Overhead. Low branches, balconies and cables can get in the way.

Send us the measurements, or photos of the route, and we’ll check it works before anything is booked. Occasionally a hot tub has to be lifted in, and it’s much better to know that early.

Before delivery day

• The base is finished, level and has had time to set.
• The electric supply is in place or booked.
• The route is clear and measured.

Not sure if your space will work? Ring the shop or send us a few photos, and we’ll tell you what’s needed.