It took two (and a half) of us two days to complete this project. We used only untreated wood knowing that it won't last more than a few years but we didn't want treated wood to leach into our compost that will be used in our organic gardens. Here is what our finished product looks like!
My nontechnical side can't tell you the size of boards my husband used for each part. If you are interested in that info just comment me and I'll get it for you! We put together the backside first in our garage and carried it over to the back of the house where it was to stay. From this stage we began to add the interior sides that divides the chambers.
The interior walls have slats for air circulation but are not moveable. Only the fronts are removeable on our compost bins. To create the slots in the front panels, we used 2x4's to "sandwich" the slats in place (didn't I tell you I was a technical writer). To keep an even amount of space in between each slat, we used exterior screws drilled into the bottom of each slat. We left them sticking out 2 inches.
This is our finished product with the fourth bin's front slats off. As you can tell, my children think it's a new playground!
And we couldn't have finished this project with out our little man, who is our half I had mentioned previously!