Wooden Cold Tub 120 PVC

Larger DIY plunge with PVC insert

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Product information

Bigger, deeper, and built by your own hands. The DIY Wooden Cold Tub 120 pairs structural Thermowood with moisture resistant Thermowood at the waterline, a genuinely larger 120cm diameter for proper movement during a session. Self assembly keeps the cost down without cutting corners on the finished build. Built for anyone using cold exposure as a real part of training, not a novelty tried once and forgotten. This Thermowood version includes a PVC insert.

Heat Treated Thermowood

Heat Treated Thermowood

Built for Every Season

Built for Every Season

Everything You Need to Install

Everything You Need to Install

Designed for Fast Heat-Up

Designed for Fast Heat-Up

Specifications

  • Shape: Round
  • Accommodates: 2 People
  • Diameter: 120 cm
  • Max Height: 100 cm
  • Wall Thickness: 42 mm
  • Material: Thermowood
  • Assembly: Self-assembly
  • Insulated: No
  • Design Note: DIY kit; stainless steel hoops

Designed around your ritual

Full Moon Back Window

Full Moon Back Window

Bring the outdoors in. A full circular rear window fills the sauna with natural light and opens up wider scenic views.
Half Moon Back Window

Half Moon Back Window

Privacy meets natural light. A half-moon rear window creates a softer, brighter feel while keeping more enclosed wall space.
Full Glass Front Barrel

Full Glass Front Barrel

Turn every session outward. Full front glazing opens the barrel sauna to natural light and uninterrupted outdoor views.
Full Glass Front Cube

Full Glass Front Cube

Modern design, open views. Full-height front glazing creates a brighter, cleaner space with a sharper architectural finish.
LED Lighting Kits

LED Lighting Kits

Set the perfect mood. Integrated LED lighting creates warmth and atmosphere, transforming the sauna experience day or night
Bluetooth Speakers

Bluetooth Speakers

Soundtrack your downtime. Built-in Bluetooth speakers bring music, podcasts, and guided sessions straight into your sauna.
Quality Accessories

Quality Accessories

Complete the experience properly. Practical finishing touches that improve comfort, convenience, and the overall sauna ritual.
Premium Thermowood

Premium Thermowood

Built to age beautifully. Thermowood offers a richer finish, stronger durability, and better long-term performance.
For serious cold water therapy practitioners, particularly those training regularly or recovering from intense exercise, having genuine capacity, room to properly submerge and move rather than crouch in a tight space, makes a real difference to how effective and how bearable a session feels. The physiological benefits of cold immersion, vessel constriction followed by rebound dilation, improved alertness, and support for exercise recovery, are well established, but a tub that's actually comfortable to use properly tends to get used more consistently than one that feels cramped.

The DIY assembly route specifically suits practitioners who value getting more capability for their budget, putting the savings from self-assembly into a genuinely larger tub rather than a smaller pre-built equivalent. This larger capacity also makes occasional shared use practical, useful for training partners or couples building a joint cold exposure routine together rather than taking turns in a single-person tub.

Building a consistent cold water habit, whatever the specific goal, whether that's athletic recovery, mental discipline, or general wellbeing, depends heavily on the practice being genuinely manageable and pleasant enough to repeat regularly. A larger, more capable tub removes some of the friction that a cramped or undersized installation might create, supporting the kind of long-term consistency that delivers the most noticeable benefits from cold therapy over time.
Delivered as a DIY kit with pre-cut Thermowood staves and stainless steel hoops, with free UK mainland delivery on qualifying orders. This is a more involved build than the pre-formed tubs in the range, closer to traditional cooperage assembly, best planned over a weekend. Needs a solid, level base and clear access. See our Self Assembly Guide for tools and preparation.
This larger DIY-assembled cold tub follows standard Thermowood care principles, with a little extra attention warranted on the stainless steel hoops that hold the construction together. Check the hoops periodically for tightness, since stave-built timber tubs can settle slightly after initial assembly and benefit from a check during the first few months of use, then occasionally thereafter.

Refresh the water regularly depending on usage frequency, since the larger volume in this size will still develop algae and odour if left stagnant for extended periods, particularly in warmer months. Wipe down the interior periodically, focusing on the waterline where residue collects, and check for any signs of leaking at the stave joints.

Externally, the combination of Thermowood means slightly different weathering characteristics across the structure; the Thermowood elements resist weathering naturally while any Thermowood components benefit from a wood treatment every two to three years to match. Keep the base area well drained and free of standing water, the same principle that applies to any outdoor timber structure holding water.
This tub comes with a 5 year warranty for residential use and 2 years for commercial use, covering structural timber and hardware. Valid claims are assessed case by case, and we'll supply replacement parts wherever possible rather than the whole tub.
Production takes 2-4 weeks, plus 1-2 weeks dispatch time for pallet haulage. This tub is delivered flat packed unless otherwise stated. Free UK mainland shipping applies to orders over £500 covering up to one double pallet (2.4m x 1.2m x 2.2m) or two single pallets (1.2m x 1.2m x 2.2m). If your order exceeds this due to length, weight, or quantity, additional pallet charges may apply and are quoted separately based on postcode. Please have a solid base, clear access, and suitable unloading space ready before delivery. Pallet deliveries are kerbside only, and you're responsible for moving goods onto your property.
Health Benefits
Assembly & Installation
Delivered as a DIY kit with pre-cut Thermowood staves and stainless steel hoops, with free UK mainland delivery on qualifying orders. This is a more involved build than the pre-formed tubs in the range, closer to traditional cooperage assembly, best planned over a weekend. Needs a solid, level base and clear access. See our Self Assembly Guide for tools and preparation.
Cleaning & Care
This larger DIY-assembled cold tub follows standard Thermowood care principles, with a little extra attention warranted on the stainless steel hoops that hold the construction together. Check the hoops periodically for tightness, since stave-built timber tubs can settle slightly after initial assembly and benefit from a check during the first few months of use, then occasionally thereafter.

Refresh the water regularly depending on usage frequency, since the larger volume in this size will still develop algae and odour if left stagnant for extended periods, particularly in warmer months. Wipe down the interior periodically, focusing on the waterline where residue collects, and check for any signs of leaking at the stave joints.

Externally, the combination of Thermowood means slightly different weathering characteristics across the structure; the Thermowood elements resist weathering naturally while any Thermowood components benefit from a wood treatment every two to three years to match. Keep the base area well drained and free of standing water, the same principle that applies to any outdoor timber structure holding water.
Warranty
This tub comes with a 5 year warranty for residential use and 2 years for commercial use, covering structural timber and hardware. Valid claims are assessed case by case, and we'll supply replacement parts wherever possible rather than the whole tub.
Delivery
Production takes 2-4 weeks, plus 1-2 weeks dispatch time for pallet haulage. This tub is delivered flat packed unless otherwise stated. Free UK mainland shipping applies to orders over £500 covering up to one double pallet (2.4m x 1.2m x 2.2m) or two single pallets (1.2m x 1.2m x 2.2m). If your order exceeds this due to length, weight, or quantity, additional pallet charges may apply and are quoted separately based on postcode. Please have a solid base, clear access, and suitable unloading space ready before delivery. Pallet deliveries are kerbside only, and you're responsible for moving goods onto your property.

Serious capacity for the hands-on owner

The DIY Wooden Cold Tub 120 is built at a genuinely larger 120 centimetre diameter than the standard round cold tubs in the range, giving more room for movement during a session and a deeper, more substantial feel overall once filled. The build uses a combination of Thermowood, pairing the structural qualities of Thermowood with the moisture resistance of heat treated timber where it matters most around the waterline and base.

As a DIY model, it is supplied for self assembly, which keeps the cost more accessible than a factory finished tub while still delivering a properly built, durable result once assembled correctly. At 120 centimetres across and 100 centimetres deep, there is enough volume for a proper cold plunge session without feeling cramped, useful for anyone using cold exposure as a regular part of a training or recovery routine rather than an occasional novelty tried once and then left to gather leaves in a corner of the garden.

This model suits hands on owners who are comfortable with a self assembly project and want a larger, more capable cold tub without paying for a fully pre built equivalent of the same size. It rewards a bit of weekend effort with a tub that genuinely performs at a scale the smaller, factory finished options cannot quite match, and there is a real satisfaction in stepping into cold water in something you built with your own hands rather than simply ordered and unpacked. This Thermowood version includes a PVC insert.
Free Mainland UK Delivery Weather Resistant Thermowood Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Free Mainland UK Delivery Weather Resistant Thermowood Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Free Mainland UK Delivery Weather Resistant Thermowood Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
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Genuine capacity, assembled by hand

Genuine capacity for serious training recovery, assembled by hand to keep costs down. Thermowood construction with traditional stainless steel hoops, sized for one or two users.

Built for owners who'd rather assemble bigger

Built for hands-on owners who'd rather assemble a bigger tub than buy a smaller pre-built one. This 120cm diameter cold plunge gives real room for serious recovery routines.

Traditional cooperage meets cold therapy

Traditional cooperage-style construction meets modern cold water therapy. Stainless steel hoops, Thermowood materials, and genuine capacity for committed training recovery at home.

Real size without the pre-built price tag

For DIY-minded owners serious about cold therapy, this kit delivers real size without the pre-built price tag. Solid construction, traditional hoops, sized for one or two people.

What our customers say

Don't just take our word for it

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"The Cascina suits the house perfectly. What stood out most was the sturdy frame, neat roof finish and how well the design works with the garden."

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Charlotte

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"The Fiano Glass Doors feel smooth, sturdy and well finished. They keep the space bright and open while adding extra comfort when the weather turns cooler."

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Create your recovery setup

1

Choose the cold tub shape, finish and setup that suits your recovery routine.

2

Place your order and we confirm the details before preparing your tub.

3

Set it up at home and build cold water into your weekly routine.

CREATE MY COLD ROUTINE

Frequently Asked Questions

The kit includes pre-cut Thermowood components held together with stainless steel hoops, a traditional cooperage-style construction method that most competent DIY owners can assemble at home with basic tools.

Yes, this larger format comfortably accommodates two people for a shared session, or gives a single user considerably more room than the standard compact cold plunge formats.

Stainless steel hoops are a traditional, proven method for holding timber stave construction together under water pressure, resistant to corrosion and tried over generations of wooden tub and barrel making.

Yes, assuming correct assembly, the construction method and materials are the same quality as a pre-built equivalent; the difference lies in who does the assembly rather than the finished product's durability.

Basic hand tools are typically sufficient for assembly, following the supplied instructions; no specialist equipment is generally required beyond what most competent DIY owners already have.

5-Year Guarantee

5-Year Guarantee

Built for years of wellness and relaxation

Free UK Mainland Delivery

Free UK Mainland Delivery

Free delivery throughout England, Wales, and Scotland.

Expert Help, When You Need It

Expert Help, When You Need It

Friendly specialist support before and after your purchase. Schedule a virtual appointment.

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