Double-Decker Drum Composter

How To Build A Double-Decker Drum Composter

Making compost is a great way to reduce your household waste and improve your soil quality at the same time.

Double-Decker Drum Composter
Double-Decker Drum Composter

This double-decker drum composter is a sturdy, rodent- and rot free container for all your compost. And it allows you to easily turn your compost which helps it breakdown faster.

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  • 3 pcs – Pressure treated 8′ long 4×4 Timber
  • 1 pc – Pressure treated 8′ long 1×4 Timber
  • 4 Stakes
  • 2 pcs – 5′ long Galvanized Poles
  • 2 55 gallon Drums
  • Galvanized Lag Bolts
  • Corner and Flat Braces
  • Drawer Handles
  • Hinges
  • Barrel Locks
  • Nuts and Washers
  • Exterior Screws
  • Cement



Double-Decker Drum Composter

The frame consists of 3 pressure treated 4×4’s and 1 pressure treated 1×4, all eight feet long. One 4×4 was cut exactly in half and the 1×4 was cut into quarters – they were to become the 2 beams and 4 stakes.

Double-Decker Drum Composter

I drilled pilot holes through the posts and into the beam and held them together with galvanized lag bolts. Each of the corners where the beam meets the post got corner braces and the top got flat braces. The braces are meant for extra support, since the barrels may become heavy. The space between the top beam and the bottom beam was 3 feet.

Double-Decker Drum Composter

I used a 2-inch hole saw to cut holes into the sides of the posts so they can hold the poles later on.

Then, I used some exterior screws to fasten the stakes to the bottom of the posts. The entire frame gets cemented into the ground later and the 4 stakes offer additional support to the frame.

At the bottom of the posts and stakes, I drilled some screws partially into the wood to hold them into the cement better.

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