The first thing you have to know is how a pontoon boat works, which is simply a raft attached to some kind of floats that keep the raft afloat in the water. Now that you know how they work, all you have to do is find the right materials to make your own. These materials can probably be found all around your own home and you might be surprised at what a little effort can afford you.
The first and most important pontoon boat part that you are going to need is the floats. These can be made of anything that is sealed and airtight such as barrels or even large pipes that can be attached to the second most important piece of the pontoon, and that is the deck. The deck can be made of plastic, plywood, or even a thin sheet metal. It really is only limited to your imagination as to what kinds of materials you can use, and how big or small you want your pontoon boat to be.
Once you have your materials, the third aspect of building your very own pontoon boat is the motor. You can readily find small outboard motors online or even at boating shops. These motors do not have to be very big and are easily mounted to your pontoon deck. Once you have all of these things mounted and put together, you can enjoy your lazy summer days floating along in the water with your friends and family. You can also build some kind of small cabin, or even just put some lawn chairs and a small canopy to give yourself some shade from the sun.