Red Birch and Yellow Birch wood flooring are from the same tree. The yellow is the sapwood (outer portion of the log), and the red comes from the heartwood (the center of the log). Red Birch carries a premium since the log yields much less of it than the yellow. The Character grade allows for some yellow and some knots, but it’s mostly red and it’s protected with a semi-gloss finish. This grade is generated and accumulated from broader production and is only available occasionally. This is a solid prefinished wood floor milled with micro-bevels and a smooth surface. It’s suitable for above grade installations, and can be nailed, or glued with the appropriate mastic. The finish has a limited 25-year residential warranty. The supply is limited at this price.