Cross Laminated Timber Print E-mail
Cross Laminated Timber (CLT) is a new and innovative building material that permits fast and efficient construction of single or multi-residential type buildings. CLT was first developed in Austria, and within the last 20 years, production has spread to other parts of Europe and into parts of North America. It is used mainly for wall, ceiling and roof construction.

CLT is fabricated by bonding together timber boards with structural adhesives to produce a solid timber panel with each layer of the panel alternating between longitudinal and transverse lamellae. Alternating the grain directions of each layer of timber reduces many of the weakness that previous timber products had. Specifically:
  • The effects of shrinkage and swelling are vastly reduced.
  • Load may be transferred in more than one direction.

Performance-wise, Cross Laminated Timber has proved itself to be superior in comparison to other timber products in terms of:
  • Fire resistance - CLT has a burning rate of 0.67 mm per minute (ref). Building with CLT means that fire must travel through large area of solid timber surface with little cavity available for fire to burn and travel through.
  • Noise Insulation - CLT possesses inherent noise absorbing properties
  • Heat Insulation - CLT walls are able to absorb a large amount of energy before releasing it into the atmosphere on the other side of the wall.

Technical Details

Cross Laminated Timber comes in 3, 5 or 7 layers. The width, length and thickness, however, vary between CLT production companies. For more information on CLT products, please refer to the following websites.

Case Studies

Building the World's Tallest Mixed-use Wood Structure