OAK - CLASS I

• 3 sides clear
• flawless

*click on picture

OAK - I BIS CLASS

• the same as I class
• allowed knots 5 mm
• without sapwood
• without sputs

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OAK - RUSTIC A CLASS

• allowed knots 3-4 cm but strong
• swapwood on one side but a little
• without heart

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OAK - RUSTIC B CLASS

• the same as Rustic A
• knots diameter up to 1/3 width of the finish floor
• sapwood allowed on the both side a little
• splits are allowed at the middle of the finish floor and a little bit at ends

*click on picture