Janka Hardness and Stability

Luis Herrera here. I’ve been looking at the relationship between Janka ratings and actual board movement in outdoor installs. We often lean on hardness to judge durability, but a higher rating doesn't necessarily predict how a species handles moisture cycling compared to something like teak. When you’re planning a project, it's worth checking the specific volumetric shrinkage coefficients rather than just the hardness numbers. It’s a bit of a trade-off, and I’m curious if anyone prioritizes stability over absolute hardness when choosing materials for high-exposure environments.