Quality classification and grading rules for wood products

All Lauta.fi products are graded according to our own grading rules. The grade code is part of the product name and tells you how many knots and other natural features you can expect on the visible surface.

Grade	Description
A	Highest grade for hardwood species.
AB	Grade with knots for hardwood species and Douglas fir.
EM	Special-grade pine, almost knot-free.
GOST 1-4	Graded according to the GOST 26002-83 standard (larch).
OK	Knotty spruce.
OLK	Knotty larch.
OM	Knotty pine.
TK	Sound-knotted spruce.
TM	Sound-knotted pine.
VK	Spruce with few knots.
VLK	Larch with few knots.
VM	Pine with few knots.
VM/EM	VM and EM grades sorted together; the share of EM grade is smaller.