The principle
Separation and siting are everything. Solids and urine kept apart, every unit at least 10–15 m from any water source, vent stacks that actually draw. Volunteer induction before first use, always.
Materials
- Dry-laid/mortared stone
- gravel floor
- drainage channel
- timber privacy screen
- rubble base
Tools
- See E-fast-build-design-catalogue.md §7
Reclaimed from
Slate/granite offcuts + old roof tiles + timber rails + copper/lead guttering