The dimensions of CLT elements and their structural as well as their aesthetic qualities open up new perspectives in terms of applications and design possibilities for the entire construction industry as well as architects. Together with the many advantages of this product, this explains the triumphant advance of cross laminated timber since the late 1990s.
Cross laminated timber is a solid pre-fabricated system element made from wood. CLT combines the many advantages of wood with technological achievements that enable a high degree of prefabrication and rapid, safe construction. Compared to its weight, it is one of the most capable construction materials for multi-storey buildings such as residential buildings, commercial buildings (offices, hotels), municipal buildings such as schools, kindergartens or nursing homes and much more. Further applications are extensions or upgrades of any kind and dimension in urban environments. And let’s not forget about private residential construction. The refinement of wood into CLT combines fast and precise construction with the aesthetics, comfort and sustainability of wood.
CLT consists of three to seven cross laminated softwood board plies. By gluing longitudinal and transverse plies, the swelling and shrinkage of the wood is reduced to a negligible extent. Pfeifer CLT uses dried, planed spruce and pine lamellas sorted by strength and quality as well as formaldehyde-free polyurethane (PU) glue. The individual panels are connected lengthwise by a finger joint in a force-fitting manner and finalised in the gluing station or press. In the joining centre, CNC-controlled joinery and sanding takes place according to customer specifications. The entire Pfeifer CLT production is highly automated.
Compared to conventional building materials such as concrete or steel, wood has a bonus of being environmentally friendly: Europe's forests grow more wood than is harvested. Wood is a natural carbon storage medium, has a high amount of CO2 and thus contributes actively to climate protection. Every solid wood building is more or less a “storage warehouse” for CO2. In comparison: The production of concrete and steel consumes vast amounts of energy and creates greenhouse gases.
The low weight of CLT offers advantages in transport and handling, which saves energy and costs.
At the end of a building's life cycle, this natural raw material can be completely recycled in an ecological way.