Hardness test results +
Janka ball ratings

Teragren tests all of its products with a U.S. independent laboratory. Hardness in bamboo flooring is determined by many factors. Teragren specifies the Moso species of bamboo (Teragren Optimum 5.5™ Moso bamboo) harvested at maturity between 5-1⁄2 to 6 years to ensure consistent hardness ratings and clarity of color.

The following chart illustrates the varying degrees of hardness in other hardwoods as well as Teragren bamboo. The Janka Ball test measures the force required to embed a 0.444" steel ball to half its diameter in wood. Accepted industry wide, this test reflects a particular species' ability to withstand denting and wear. It is also a good indicator of its ease or difficulty to nail.

Hardwood speciesJanka Ball Rating
Avg.
Brazilian walnut3680
Brazilian teak3540
Brazilian rosewood3000
Brazilian cherry (Jatoba)2820
Teragren Synergy bamboo2426
Caribbean rosewood2300
Santos mahogany2200
Asian rosewood2170
Merbau1925
Teragren Signature Naturals and Signature Colors prefinished bamboo1921
Teragren Signature Naturals site-finished bamboo1822
Hickory1820
Pecan1820
Teragren Studio bamboo with all-bamboo core1569
Brazilian maple1500
North American maple1450
Teragren Studio bamboo1416
White oak1360
White ash1320
Teragren Craftsman bamboo1307
Beech1300
Red oak1260
Yellow birch1260
True teak1155
North American walnut1010
North American cherry950
Honduran mahogany800
Douglas fir650