How to Build a Portable Composting Toilet (Part 2 of 2) How to Build a Portable Composting Toilet (Part 2 of 2)

Now that you have collected the materials that you need to build a portable composting toilet, it is time to put it all together. Follow the simple steps below to finish building a portable composting toilet. 

Step 1 - Cut the Plywood

Start out by cutting the plywood to the appropriate size. You are essentially going to be building a frame for your plastic bin to sit in, so measure the dimensions of the bin. The dimensions of the structure can be tailored to your needs, but making each piece approximately 2 or 3 feet square should be big enough. You want the structure to be big enough to sit on, but it still needs to be portable.

Next, transfer the dimensions that you choose to the pieces of plywood before you cut them. Place the plywood on your saw and then make a straight cut. 

Step 2 - Start the Frame

Once you have pieces cut to the appropriate size, you need to attach them together to form the frame of the composting toilet. Lie the bottom piece of plywood down on the ground that will act as the base of the toilet. Then place one of the side pieces of the plywood on the side of it going in a vertical fashion. You will then need to drill the wood screws into the side of the piece of plywood. The screw should go all the way through the outside piece of plywood and into the side of the bottom piece. 

Step 3 - Continue the Frame

After you get the first piece of the side on, continue doing this all the way around the base. Once you do this, you should be left with a base piece of plywood with 4 sides attached to it. Attach all of the sides to one another with wood screws as well. Leave the top open for now, and make sure that the plastic bin fits down into the cube that you have created. If it fits, you are free to move on to the next step. If it does not fit, you need to get a different piece of plywood to replace the piece that is the wrong size.

Step 4 - Top Layer

You can then leave the plastic bin inside the toilet frame while you put on the top layer. For the top layer of the toilet, you will need a piece of plywood that can set on top of the frame. Once you cut this piece to the appropriate size, you also need to cut a hole in the middle of the plywood. This will be the opening for the toilet. Once you do this, you need to attach the toilet seat to the top of the plywood. 

Step 5 - Preparations

If you are going to be using the toilet outdoors a lot, you might paint the outside just for some added protection. Then pour some sawdust or wood chips down into the bin so that it will help break down the waste that goes into the toilet. 


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