1.Maximum width of strips or lamellas: 50 mm. 2.Spruce (picea), fir (abies),pine (pinus), larch (larix);a mixture of wood types
1.Plug size: max. 40 mm in diameter.A maximum of 15 plugs is permitted per m2 and side.
2.Knots up to 20 x 40 mm are permitted; healthy,intergrown knots up to 40 x 80 mm. Isolated knot holes up to 5 mm in diameter are permitted (up to 10 mm for type STR)
3.Discolouration up to a maximum of 20 % of the surface per side is permitted.Decay is not permitted.
4.Strips of light compression wood are permitted
5.Splits with a maximum gradient of 1:10 to 1 mm in width and up to 500 mm in length are permitted.They must be filled in with the surface coat (with the exception of type STR)
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3 ply shuttering pannels
