Is Slate Paving Slippery?

Slate paving will generally have a natural riven surface which help with slip resistance making it less slippery. Slate is less porous than most natural stones, which does help greatly with maintenance as dirt will tend to sit more on the surface, but this also makes it more important to keep your slate paving well maintained to ensure you reduce any algae build-up which can be slippery if left unchecked.