Naturally Occuring Wood Colour Variations Allowed, From Light To Dark Brown. The Product Includes Large Sound And Black Knots. Knots May Vary In Size And Numbers.
Black Silver Is A 1-Strip Ash, Black Stain With Silver Metallic In The Pores.
There is more to subfloor preparation than these points so always check with your fitter, the manufacturer or us for further help.
Here are some useful installation guides that go into more depth: