Harvey from Fearnbeg on the West Coast of Scotland shares his twin-chamber compost toilet creation — fitted with one of our standard urine separators and surrounded by some of the most beautiful landscape in the UK.
"Hi there, just letting you know that I have fitted the doodah in the compost loo!
We live in a village that's empty most of the year, Fearnbeg on the West Coast of Scotland, and it's brill. Getting timber this week to build a new composting shed thing! All the best and cheers."
— Harvey Dougherty, Fearnbeg
Twin-chamber compost toilets
Twin-chamber systems are a smart upgrade for permanent compost toilets — you alternate between two chambers so one composts undisturbed while the other fills. Particularly useful in remote off-grid locations like Harvey's, where transporting compost off-site isn't trivial.
The principle is the same as any compost toilet: a urine separator does the smell-prevention heavy lifting, the solids stay dry under sawdust, and the chambers do the slow composting work. See our full build guide for the basics, then add the second chamber.