Building a composting toilet yourself

Besides entirely pre-assembled chemical and dry or urine-diverting toilets, you also have several options of building a composting toilet yourself. The DIY construction of a urine-diverting toilet has several advantages as you are more flexible with regard to customisation and on-site set-up. Building a composting toilet yourself is thus a great option not only for passionate DIY enthusiasts. Here, you’ll find out why it can make sense to make your own composting toilet, which options you have for this and which materials you’ll need.

Composting toilets are gaining increasing popularity, be it with campers, garden owners or even in households with a distinct awareness of sustainable lifestyles. The autonomous functionality of a composting toilet offers numerous advantages, like the unlimited mobility of the composting toilet, the saving of previous water resources, the absence of aggressive chemicals and an environmentally friendly disposal during which the excretions can be returned to the natural nutrient cycle via composting.

The composting or bio toilet is thus a suitable alternative to a chemical toilet which is currently still the most common solution for toilets in locations without access to a water connection, but which also poses a massive problem for our environment. For this reason, changing to a composting toilet is truly worthwhile as its usage is easier as well as more hygienic than a chemical toilet and as it has the environmentally friendly features mentioned above.

There are different variations of composting toilets on the German market, many of which are already assembled and consist of plastic that has been welded together. Customers have no option for customisation as most pre-assembled dry toilets don’t allow for further components to be added and removed again. Furthermore, the space issue often becomes a problem as the lack of flexibility offers no opportunities to make the composting toilet smaller or adjust it to match smaller spaces such as caravans or a Tiny House.

As the toilet doesn’t get delivered fully assembled, the transport of the individual components to more remote locations, such as a large garden, is equally more convenient. When you assemble It yourself, the toilet can be set-up directly on-site. If you’re a fan of DIY, you might also prefer to build your own composting toilet from natural materials yourself.

For the building of your own composting toilet, there are two options that we would like to introduce in this article. While you can get all the individual component yourself and cut them as needed, you can also get pre-assembled kits for composting toilets.

Building a composting toilet yourself – option 1

When considering building a composting toilet, most people’s first thought is to purchase all necessary elements individually and to then assemble these.

To do this, you’ll need the following components, among others:

  • Wood plates
  • Suitable tools (saw, drill, etc.) as well as relevant accessories (screws, dowels, hinges, etc.)
  • Toilet seat
  • Exhaust pipe and ventilator
  • Containers for liquids and solids
  • Litter and inlays

Subsequently, the following steps are required to build the composting toilet:

  1. Prepare, measure and cut the wood plates
    (Determine the dimensions depending on personal preference)
  2. Sew a hole into the upper wood plate for the separation insert, if necessary
  3. Screw the wood plates together
    (Important: Integrate a wooden flap into the toilet to be able to remove the containers for liquids and solids through it.)
  4. Attach toilet seat and, if necessary, separation insert
  5. Create an exhaust duct from the toilet into the open
    (Thanks to the separation system which separates the urine from solid excretions, no unpleasant odours develop, but an exhaust duct is still advisable if the room cannot be ventilated too well.)
  6. Place the containers for solids and liquids into the wooden box and equip the container for solids with an inlay

In order to build a composting toilet completely by yourself, a fair amount of preparing and planning is required. The components have to be purchased and cut individually and primarily, their proportions have to match one another. On top of this, certain manual skills are required to build a visually appealing, solid and functioning composting toilet.

Building a composting toilet yourself with an assembly kit – option 2

The other and considerably more comfortable option are therefore pre-assembled kits for urine-diverting toilets. These already contain all necessary, coordinated elements including accessories and assembly instructions that are easy to follow. What’s more, at TROBOLO® you can find two different sets – the TROBOLO® TeraBlœm as a urine-diverting toilet for interior areas and the TROBOLO® KersaBœm as a composting toilet for exterior areas. A further advantage of the pre-assembled kit: the complete sets are delivered directly to your home where you can immediately start with the set-up.

TROBOLO® Terablœm – building a composting toilet for indoor spaces yourself

The TROBOLO® TeraBlœm is ideally suited for interior areas thanks to its compact size. This dry toilet is versatile in its use and can act as both a second toilet within the house or as a hygienic toilet solution in the arbour, allotment or as a mobile toilet in the caravan. What’s more, the set-up of this composting toilet is explained step by step in the enclosed instructions and can be done within a short amount of time. Additional tools are also not required to build this urine-diverting toilet as the Allen key provided will suffice for all steps.

The pre-assembled set for the urine-diverting toilet consists of:

  • Assembly kit (cut, pre-drilled, hinges already applied)
  • Incl. complete set of accessories (screws, nuts, dowels)
  • Allen key
  • Toilet seat
  • Container for solids
  • Container for liquids
  • Assembly instructions
  • Label

The construction of the urine-diverting toilet can be done by following a few steps:

  1. Attach the small parts to the assembly kit as described in the instructions. The assembled kit has to stand upright in a stable position.
  2. Attach the separator to the wooden box with the help of the already attached hinges.
  3. Attach the toilet seat to the kit..
  4. Place the containers for solids and liquids in the TROBOLO®.

This is how you get a high-quality, solid and self-constructed composting toilet for interior areas with minimum effort.

You can find the complete instructions for the TeraBlœm here

The garden toilet that you can build yourself – TROBOLO® KersaBœm

Should you lack interior space for a waterless toilet, however, you can also build a garden toilet yourself. That’s why the TROBOLO® Kersabœm for exterior areas can be delivered to you as pre-assembled kit so that you can start with the set-up of the composting toilet immediately upon receipt of the product. This TROBOLO®, too, is completely autonomous and thus independent of any water or electricity source.

The Selbstversorger Familie show an example of how quickly and easily the TROBOLO® urine-diverting toilet for exterior areas can be built:

This is how you’ll build the composting toilet yourself

The set-up of the TROBOLO® KersaBœm should ideally take place on a dry day as the assembly kit should be coated with paint for weatherproof protection. It’s also important that the KersaBœm stands on the ground evenly. To do this, the best location can be determined with the help of a spirit level.

In the set for the garden toilet, the following parts are included:

  • Assembly kit (cut, pre-drilled, hinges already applied)
  • Incl. complete set of accessories (screws, nuts, dowels)
  • Toilet seat and separator
  • Container for solids
  • Container for liquids
  • Litter and inlays
  • Exhaust duct
  • Assembly instructions
  • Label

The composting toilet can be set up by on person, but it’s even more easily done with two people. The set-up takes about 45 minutes and no additional tools are required.

Proceed as follows:

  1. Assemble toilet house using the screws
  2. Attach daylight roof
  3. Fit the composting toilet into the casing
  4. Screw on the toilet seat
  5. Attach the shelf in the top left of the toilet house
  6. Place the containers for solids and liquids underneath the toilet seat
  7. Mount the door
  8. Attach the exhaust duct

You can find the complete set-up instructions for the KersaBœm here.

Note: in order to prevent changes to the wood due to weather conditions, we recommend you subsequently coat the exterior with wood protection paint.

Building a composting toilet yourself

So if you want to avoid buying a pre-assembled composting toilet and would rather take some DIY action yourself, you have a number of options to build your own urine-diverting toilet. Whilst all individual components can be bought separately and adjusted, choosing a composting toilet assembly kit is a convenient, practical and high-quality alternative. Composting toilets as assembly kits for individual construction enable a quick and uncomplicated set-up at the desired location, deliver the right components in the correct dimensions and still offer flexibility and the joy of DIY. What’s more, thanks to the well thought out construction of the TROBOLO® TeraBlœm, no tools are needed apart from the Allen key included in the scope of delivery. The TROBOLO® KersaBœm can be set up entirely without any tools.

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If so, you can request our information material for your desired product non-bindingly and free of charge.



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