The Janka hardness test is determined by a controlled test, performed to measure the force necessary to embed a .444 inch (11.28mm) steel ball to half its diameter in wood. The resulting data is expressed in pounds-force, or lbf. This industry standard assessment is designed to gauge the various wood species hardness, determine its suitability as flooring, and illustrate it’s tolerance to normal wear, tear and dents.
The higher the number on the scale, the harder the wood.
All wood species below Red Oak on the Janka scale are expected to dent or wear more easily, but offer warmth and charm as they age.
Extremely dense and exotic woods, however, are reputed for being exceptionally hard. While these species may offer benefits in high-traffic homes and offices, they can be challenging to install and require temperature controlled environments.