Our view
Building the tub is within reach of a capable DIYer. Building the stove is far less so: it is the part where safety and efficiency are decided. The safest compromise: a kit, or a home-made tub with a shop-bought stove.
The three approaches
| Approach | Difficulty | Main risk |
|---|---|---|
| Timber stave tub you build yourself | High | Watertightness |
| Reused tank (agricultural tank, trough) + cladding | Medium | Material not designed for hot water or for food-safe use |
| Kit to assemble | Low to medium | Quality of assembly |
Safety points
- Materials: use only materials designed for hot water and skin contact.
- Stove: no hot parts within reach of bathers, a tall enough flue, clearance from flammable materials.
- Base: the load often exceeds 1.5 tonnes once filled.
- Electrics: no makeshift installations near water.
The main steps
- Decide on the size and water volume.
- Prepare a level, load-bearing base.
- Build or install the tub, then test it for leaks with cold water.
- Install the stove and flue following the stove manufacturer’s instructions.
- Add the benches, cladding and lid.
What does it really cost?
The budget depends enormously on the reclaimed materials you have to hand. Do not forget the stove, often the biggest single item, stainless steel fixings, insulation and the lid. Then compare with entry-level models and kits, which come with a warranty and are ready to use.
Frequently asked questions
Can I build a hot tub stove myself?
It is technically possible for an experienced welder, but it is the riskiest part: a badly designed stove can burn through, leak or warp. A stove sold for this purpose is strongly recommended.
Is a home-made hot tub really cheaper?
The materials can cost less than a new model, especially with reclaimed materials. But once you add the stove, fixings, insulation, the time spent and the risk of mistakes, the gap with a kit or an entry-level model often narrows.