JOINED WITHOUT METAL: LIGNOLOC® CLT IN MASS TIMBER CONSTRUCTION
Discover the innovative possibilities of CLT (cross-laminated timber), whose layers are joined with LIGNOLOC® wooden nails – without metal and without full-surface gluing.
What is cross laminated timber (CLT)?
Cross-laminated timber (CLT) is an innovative solid wood product that impresses with its multi-layered construction. It consists of at least three layers of timber glued crosswise, making it particularly strong, load-bearing and dimensionally stable. This structure enables large spans and versatile use in residential and commercial construction, as well as for adding storeys.
As a solid timber product, CLT stores the carbon that the trees absorbed from the atmosphere as CO₂ while they grew – for as long as the timber remains in the building. Thanks to precise production, large-format elements with millimetre-precise cutting and finished surfaces are possible, making CLT a modern and high-performance building material.
mass timber WALLS BECOME LIGNOLOC® CLT (LCLT) WITH LIGNOLOC® WOODEN NAILS
Conventional cross-laminated timber (CLT) is bonded across its full surface, and nail-laminated timber (NLT) is joined with metal nails. In LIGNOLOC® CLT (LCLT), LIGNOLOC® wooden nails made of highly compressed beech veneer wood do this job instead: they join the timber layers without metal and without full-surface gluing.
This has practical benefits: during prefabrication, the elements can be sawn, milled and drilled without metal getting in the way. The connections do not create point thermal bridges from metal fasteners. And when the building is dismantled, wood and nails do not need to be separated: the elements can be cut and processed further together with the wooden nails.
Cross Laminated Timber (CLT-elements) elements using LIGNOLOC® wooden nails
Why use LIGNOLOC® cross-laminated timber in mass timber construction?
Manufacturing a LIGNOLOC® wooden nail generates up to 66% less CO₂e than manufacturing a technically comparable steel nail.* Nailed elements can be sawn and milled during dismantling without first removing any metal parts.
*Source: nova-Institut – LIGNOLOC® LCA (Life Cycle Analysis), May 2018. Scope: manufacturing phase; reference product: steel nail made from wire produced in Asia. Study summary: https://renewable-carbon.eu/news/life-cycle-assessment-of-the-lignoloc-wooden-nail/
Improved insulation values due to low thermal conductivity and increased thermal insulation.
Fast and precise processing without tool wear through metal nails. This leads to shorter construction times and high precision in prefabrication.
Why use LIGNOLOC® cross-laminated timber in mass timber construction?
Flexibility and aesthetics: In mass timber construction, LIGNOLOC® wooden nails offer more than technical advantages. They also open up new possibilities for architecture and interior design.
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