Picked up 3 skids from the trash at the Ringwood and Bayswater stores, broke them down and cut to size with an Ozito Mitre saw.
I had some merbau panels left over from my deck that I used as a base inside the box. The base is held up by some legs I cut and attached to the frame. Banged it all together with some pin head nails and wood glue. The aim was to only use what I had on hand.
I lined it first with weed mat and secondly with plastic liner, both purchased from Bunnings. I fastened it with an Ozito staple gun. I put holes through the liners to allow water to seep.
I'm terrible with mitre cuts and measurements so the topper is a bit out of whack but perfectionism wasn't a requirement.
I will put some spacers under the legs to lift it up to prevent it sucking up rain water.
I'm considering oiling it but I like the natural look. Thoughts?