HDF Engineered Strand Woven Bamboo Flooring offered in a "Drop in Click" style joint and stylish finish. This flooring features a Janka rating of 4,000, more than three and a half times harder than Red Oak. The durable 11 layer polyurethane/aluminum oxide finish offers a high scratch resistance while maintaining a beautiful appearance. The higher stability and unique construction of Strand Woven Bamboo allows for glue down or floating installation over multiple subfloors on, below, or above grade. An existing home should have a consistent room temperature of 65°F - 75°F and relative humidity (RH) of 40% - 55%. Continual deviation from these conditions will affect the dimensions of flooring (see installation guide for more details).