Outer layers of cardboard have a (slightly) water resisting coating, that protects the inner crinkly layer. Tearing the cardboard to reveal the crinkly layer greatly speeds up decomposition, avoiding gradual waterlogging.
Thanks!
@JWestland started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Outer layers of cardboard have a (slightly) water resisting coating, that protects the inner crinkly layer.
Tearing the cardboard to reveal the crinkly layer greatly speeds up decomposition, avoiding gradual waterlogging.