Surface quality
of glulam components

Glulam components can be manufactured with different surface qualities. Surface quality refers to the condition of the surface of the wood. It includes features such as colour, texture, grain, surface treatment and freedom from defects. Surface quality is an important factor when deciding on a particular wood grade.

Definition of surface qualities
in the glulam leaflet

As there is no standard for the surface qualities of glulam, the Studiengemeinschaft Holzleimbau e.V. has defined various qualities in the glulam leaflet. The desired quality must be contractually agreed in each case and specified in the performance specification. The surface quality is divided into the following categories:

Industrial quality: This surface quality is suitable for use in industrial applications where the optical quality is not important. Slight colour variations and minor errors are permitted.

Visible quality: This surface quality is intended for use in visible areas where the surface of the BS wood is visible. There must be no major defects, such as knotholes or cracks. However, colour deviations and slight unevenness are permitted.

Selection quality: This surface quality is the highest quality level and is used for particularly demanding applications. The surface is completely free of defects and has a uniform colour and texture.


Surface quality X-LAM

Depending on your wishes and requirements, we produce our wall and ceiling elements from X-LAM in different surface qualities. For spruce wood, we distinguish between non-visible quality and visible quality. But we also produce various special surfaces such as other types of wood, cutting techniques or glazes according to your requirements. Learn more about the different surface qualities of our X-LAM elements.

Individual glulam

With our glued laminated timber (glulam), individual constructions can be built, because we produce the components in almost any shape and size – entirely according to your wishes. The kiln-dried wooden boards are joined together by finger-jointing to form long lamellas. Discover our wide range of glulam products.

X-LAM element construction

Whether roof, ceiling or wall – X-LAM can be used in a variety of ways. Our X-LAM element construction gives you great freedom in building design. The flexibly usable elements made of cross laminated timber are custom-made for you and can be assembled quickly and easily.

Find your contact person

Your partner for timber construction

With DERIX as a strong partner at your side, you will implement your construction projects sustainably and efficiently.


Exklusive services, newsletter & Co.

Register now and get exclusive access to extensive specialist content. Use our helpful digital service tools such as our X-LAM Designer and stay well informed with our newsletter.