Premium Quality Sauna Boats

The Prince

This small sauna boat is perfect for families and small groups up to 6 people. Go into the sauna straight from the front, and out from the back.

The Knight

A small floating sauna for up to 6 people with enough space to walk around the sauna cabin. Plus, you can have a great view from the large side window.

The Constantine

Double-decker medium-sized sauna boat that fits 12 people in total. The cabin features a six-person sauna room and a spacious lounge area.

The Grand Emperor

Double-decker sauna boat that fits 18 people in total and 12 in the sauna. Big floor-to-ceiling windows and much more.

Custom Boats

We make bigger sauna boats and lounge boats as well. Get something even more lavish for bigger crews. Perfect for rentals
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Jump to section:

  1. What is a sauna boat?
  2. About our sauna boats
  3. Durability
  4. How we construct the sauna boats
  5. CE marking for sauna boats
  6. Safety on sauna boats
  7. Worldwide delivery
  8. After-care and maintenance
  9. Aesthetic design
  10. Posh naming convention
  11. Why should I buy a sauna boat?
  12. What if I don't like saunas?

What is a Sauna Boat?

A sauna boat is a type of mobile sauna constructed on top of a platform that floats on water. The floating devices are usually made of durable plastic or non-corrosive metal (mostly aluminium). The floats can either be tubular or rectangular in shape, depending on the application. Sauna boats are most common to the countries with old sauna traditions, like Finland, Estonia and Russia and many others in the Northern part of Europe. In recent decades, more and more sauna boats have been built all over the world.

About our Sauna Boats

A floating platform can have virtually anything on top of it - a tent or a small cabin, a restaurant or even a house to accommodate a big family. Since we love to take our sauna boat out for a spin in any weather, we thought that sharing the experience would be a grand idea, so we began designing and building several different floating saunas. The selection you see here is far from complete - we are constantly upgrading our product line.

The type of sauna on our sauna boats is usually a Finnish sauna, which features hot temperatures around 80–90 °C (176–194 °F) and whisks made of birch (in Finnish: "vihta"). Water is thrown on the hot stones on top of a special stove. As the water evaporates, it creates moisture and heat ("löyly"). We provide sauna boats with both wooden and electric stoves.


The sauna floats on very durable plastic pontoons which are completely airtight and backed with quality certificates. That means no water can penetrate the pontoons. The only way a pontoon can have a leak, is when met with a sharp rock at high speed. Even if one of the pontoons should get damaged, we have made sure that the sauna boat will not sink and you can safely return to the marina.

Even the smallest sauna boats have a buoyancy of up to several metric tons, to handle the weight of the construction and the sauna itself, and everyone on board within the permitted limits. The smaller sauna boats carry up to six people and the bigger ones, up to 18. There are even sauna boats that can comfortably fit over ten people in the sauna alone. These are perfect for hospitality businesses that would like to expand their range or for sauna boat rental companies that we have met quite a few of already.

Anything that leaves our production facility is carefully built to last for years. How many years exactly, depends on the weather conditions in your area, how well the boat is maintained, and whether it is lifted out of the water at sub-zero temperatures. Should you opt for a bigger sauna boat with a second deck, we can provide a cover for tucking it in for the winter.

How we construct the Sauna Boats

All sauna boats we build follow strict construction standards. There is a reason why we call our products premium. Main features of all our designs include: 

  • Durable polyethylene pontoon floats
  • Corrosion resistant steel connector beams
  • Impregnated and oiled deck boards
  • Double or Triple-glazed windows
  • Lockable doors (exterior)
  • Premium, waxed sauna furniture
  • Premium quality interior walls
  • Painted exterior walls
  • Insulation between wall layers
  • Composite, insulated flooring in the cabin 

The saunas float on very durable plastic pontoons which are completely airtight and backed with quality certificates. That means no water can penetrate the pontoons. We pick the pontoons we use on any floating construction based on where the boat will be used and how much load it needs to carry. For example, the pontoons we use in colder climates vary significantly from pontoons used in hotter climates. 

When the weather drops below freezing temperature, the biggest aspect to consider is (drift) ice. This means we need to use floats that are able to withstand the grind. In hotter climates, it’s the sun-rays and the high UV-index that could potentially damage the pontoons over many years. In any case, we come prepared to keep your sauna afloat during its whole lifetime. When maintained correctly, we estimate our sauna boats to last 10+ years.

Why do we use insulation between wall layers? Mainly, because it’s good both for the environment and your wallet. With insulated walls you do not have to heat up the whole boat, just the sauna room. This helps reduce the carbon footprint and keep costs low, irrespective of whether you use electricity, wood or even gas (available in some applications). Additionally, when you need to renovate the interior in the future, you have the option to do that. The cross-section for our standard wall is as below:

  1. Premium quality, light interior made of aspen or alder
  2. Lath providing ventilation for the interior wall
  3. Wall main structure made of laminated veneer
  4. High-performance insulation with a polyisocyanurate (PIR) core (thermal conductivity of 0.022 W/mK)
  5. Lath providing ventilation for the exterior wall
  6. Exterior Cladding made of spruce or pine

CE marking for Sauna Boats

We include a CE certificate with every floating sauna we construct, as per our license No.: MES000120, issued by the Estonian Ministry of Economic Affairs and Communications, and supervised by the Estonian Maritime Administration.

The CE (Conformité Européenne) for small crafts is required for all recreational boats being sold in the European Economic Area (EEA), including all countries in the European Union, Iceland, Norway, Lichtenstein and Turkey. If you live outside of EEA, please make sure that a CE marking constitutes a valid proof of safety in your country. In case it does not, let us know and we shall find out what we need to do in order to comply with your local standards.

Our construction processes follow numerous ISO standards so that the floating saunas we build are safe to use. The main directive that governs our design and construction process is Directive 2013/53/EU of the European Parliament and of the Council. 

Other standards we comply with when building our sauna boats or rafts:

  • Hull construction and scantlings: EN ISO 12215-3:2002
  • Fire Protection: EN ISO 9094:2017
  • Maximum load capacity: EN ISO 14946:2001/AC:2005
  • Stability and buoyancy: ISO 12217-1 & ISO 12217-3 

Issuing a CE marking is a standard process for our standard boats, so it does not take extra time. 

If you have a custom floating sauna in mind, please keep in mind that issuing a CE marking takes us about a week after construction, due to the need for testing the floatability and stability of the boat.

Safety on Sauna Boats

Safety on the sauna boats we produce is of paramount importance. Your boat, by default, will be equipped with the following:
  • Lifebuoy
  • Fire extinguisher(s)
  • First aid kit(s)
  • Safety railings with wooden handrails
  • A guard around the sauna stove
  • Other miscellaneous safety items like ladders and handles
  • Marine cleats in all directions for docking
Some time ago we wrote a more detailed overview of how we approach safety on our sauna boats.

Worldwide Delivery

We are geared towards offering a full service from first contact with us to having a splendid time on your boat.

Depending on where you live, we can deliver the sauna boat either fully assembled and ready to use, or in modules. We prefer to ship it fully assembled, but on some occasions it makes sense to transport the boat in modules. In that case, we could come over and finish the assembly ourselves or if you are feeling extremely handy, you are welcome to do it yourself. You will probably need some help from a couple of friends, and power tools. We will provide the basic instructions and information on how to assemble your sauna boat. 

Please note, however, that in case of self-assembly, we are not able to provide the CE marking due to not being able to verify the compliance of the assembly and implement the final test of the craft. 

Should you live outside the EEA, we will make sure the used materials will comply with your local standards. That includes thermo-treating the wood, etc. 

After-care and maintenance

Standard maintenance instructions are delivered with every sauna boat. The works should take about four to six hours at the start of each season. The instructions slightly vary depending on the climate, model of the boat and your optional extras. If you are up for it yourself, standard maintenance of the sauna boat is not that expensive. 

These mostly include re-oiling the deck (once a year), re-waxing the sauna benches (normally every other year) and repainting the exterior walls (every five years). Should you need an engine as well, this certainly needs a little bit of care by a certified service professional as per the engine’s user manual, which we supply with the engine.

Aesthetic Design

We strive for Nordic, minimalist and aesthetic design in our sauna boats. Since there is no extra space on a floating sauna, we give our best to use all of the available area and be most practical about it. Especially when it's not a stationary sauna boat.

As a standard solution, we offer natural finishes that can be modified to your liking. Should the sauna cabin be navy blue? No worries. What about a door that locks from the outside? We'll make it happen. You need a second or a third deck on top of the sauna? If it still floats afterwards, we've got you covered.
Since the sauna boat is exposed to different weather conditions, we pay special attention to the difference in temperatures and humidity between the outside and the cabin(s). The walls inside the sauna are built in a way that would allow excess moisture to escape. The door frames withstand humidity, the windows are carefully selected and optimally placed, considering that the water would not condensate too much on the surface.

Posh Naming Convention

We are not saying that Sauna Boat Blank JS, Sauna Raft Timothy or Floating Sauna 3000 MEGACRUISER do not sound okay, and by all means, we are no experts. We are just not the fans of "okay" in anything we do. Since naming our company Emperor Rafts, it seemed that our products deserve some nobility as well. The bigger the boat, the higher the rank. By designing bigger sauna boats and platforms every week for our clients, we get a chance to perfect the new sauna boats in detail and come up with other, "standard" products, build them, get them certified, and list them here with other royal members of our family.

Why should I buy a sauna boat?

A sauna boat, also known as a "sauna raft", "floating sauna", "boat sauna" or "raft sauna", is not just a wooden construction floating on water. The experience of using or owning one is somewhat difficult to explain, much like describing snow to a person who has never seen it. Nevertheless, we'll give it a try.

In comparison with yachts and speedboats, a floating sauna certainly loses in speed, but in fact, the lack of speed might not be such a bad thing. Nowadays, we might sometimes feel the need to meditate, listen to tranquil music or take a nap to invigorate our body and mind. Having a sauna on water might just do the same trick and help you slow down for a while. Whereas jumping into the water after a hot sauna does a much more invigorating magic with the body. All of this for a fraction of the cost of a speedboat.

The function of cost versus the amount of friends you can take on board is exponential for a yacht and much more linear for a sauna boat. In other words, upgrading to a bigger sauna boat is cheaper than getting a new yacht. Organising a trip with a small company or having a birthday party does not have to be expensive. To sum up the maths part, the degree of fun is relative.

Suppose you like fishing with your friends. Bring all your gear and most of the friends on the sauna boat, sail to your favourite spot and reel the fish in! The sauna boat gives everybody enough room to move around or cast a gill-net. When the fish are already biting and you seem to have no containers left to hold the fish in, it's time to heat up the sauna, maybe the BBQ grill as well, and relax with your comrades. Feeling refreshed when arriving ashore is guaranteed.

If you have trouble deciding, see our post about what you should know when deciding to buy a sauna boat.

What if I don't like saunas?

Not to worry. Our custom platforms can carry all sorts of payload up to several tons, which means we can build all types of structures on them. They can be used as an outside sitting area for riverside restaurants or as cargo transporters, like a car across the river or a lake. You could make it a lightweight shipping boat with a cosy couch on it. If you are up for living on water, we can even build you a small cabin on the platform. The possibilities are virtually endless.

Feel free to contact us if you have an idea that's not listed here or if you have any questions about what we do.