Grading Guide
Bristol Tectonic® Oak Planks
Prime
- Little colour variation.
- Straighter, more consistent grain direction
- Live sawn — mix of cathedral grain, straight grain, and medullary ray flecking.
- Occasional pencil knots up to 10mm allowed.
- No splits/cracks permitted
- No edge sap permitted
Character
- Natural colour variation permitted
- Natural grain variation allowed (mixture of cathedral grain, irregular grain,
and straight grain, including medullary rays - Live sawn — heartwood allowed
- Sound knots up to 80mm diameter
- Filled knots up to 35mm
- Occasional small stable end splits allowed – length up to 100mm
- Some sound hard sap allowed up to 10% of face area of the board
Giant Tectonic® Oak Planks
Mill Run
This grading is a mix of our other oak grades with varying characteristics. All grades may contain smaller or larger colour variations and traces of sapwood. Unlimited knot size. Colour of boards, amount of clear boards, knot and splits or sap will vary per batch.
Tectonic® Engineered Oak Herringbone
Prime
- Mainly clear boards — cathedral grain, straight grain and medullary rays.
- Minimal colour variation permitted
- Sound pencil knots up to 10mm allowed.
- No sapwood
Character
- Natural grain variation — mixture of cathedral grain, irregular grain, and straight grain, including medullary rays.
- Natural colour variation permitted
- Occasional sound knots (no size limit)
- Occasional filled knots up to 40mm allowed
- Includes some heartwood and occasional cracks
- No sapwood
Tumbled Solid Oak Herringbone
Mill Run
This grading is a mix of our other oak grades with varying characteristics. All grades may contain smaller or larger colour variations and traces of sapwood. Unlimited knot size. Colour of boards, amount of clear boards, knot and splits or sap will vary per batch.
Douglas Fir
Select
- Mainly clear boards.
- Sound knots allowed up to approx. 30mm.
- Open knots replaced by 30mm plugs.
- Limited sapwood allowed.
- No splits permitted.
Rustic
- Sound knots are allowed without any limitations.
- Open knots are replaced by 30mm/50mm plugs.
- Open pin knots are filled.
- Sapwood is allowed without restrictions.
- Occasional heart and end cracks up to 100mm are allowed but are filled.
European Ash
Select
- Deselected for colour (brown).
- Occasional sound knots – max. 20mm (30mm on 260/300mm wide boards).
- Filled knots — max. 10mm (15mm on 260/300mm wide boards).
- Minor (end) cracks up to 20mm allowed.
- Sap and natural olive ash heartwood allowed.
White Ash
- No olive heartwood permitted.
- Occasional sound knots – max. 20mm (30mm on 260/300mm wide boards).
- Filled knots — max. 10mm (15mm on 260/300mm wide boards).
- Minor (end) cracks up to 20mm allowed.
- Sap and natural olive ash heartwood allowed.
Elm
Mill Run
Elm is a rare wood species, as such it is supplied in a mixed width and in a mix grade only (known as Mill Run). The grading is a mix of 4 grades with varying characteristics. All grades may contain larger colour variations and traces of sapwood, as this is typical for elm.
American Black Walnut
Select
140/180/220mm wide:
- Knots maximum of 20mm,
- Filled knots up to maximum of 10mm
- Limited sapwood (steamed to balance colour)
260mm wide:
- Knots maximum 30mm
- Filled knots up to maximum of 15mm
- Limited sapwood (steamed to balance colour).
Grading Guide
Download our guide to help you select the right grade of wood for your project.