Cross-Laminated Timber Panels

From Open Energy Information

Cross-Laminated Timer Panels are formed using planed “lamellas” (planed boards from 1” thick x 5”-7” wide) laid and glued using formaldehyde-free, food-grade glue in a vacuum press in alternate layers, at 90 degrees to each other, creating panels that are from 3 to 11 layers thick. These panels form a robust, structurally strong building system that outperforms anything currently available in the USA. Quality control is optimized with the pre-fabrication of the structural panels in an atmospherically controlled facility using computer controlled cutting equipment. State-of-the-art computer aided design programming is transferred directly to the manufacturing process. More information can be found at [1] The primary benefits of the CLT system are the components’ superior performance characteristics and the speed of the building process. When compared to traditional building materials and methods, the CLT system has numerous, significant advantages, including: Thermal efficiency: CLT buildings can double the energy efficiency of conventional buildings. The ‘thermal mass’ characteristics of the CLT building system allows the ambient temperature of the internal environment of any building to be retained with less energy, ensuring minimum expenditures of heating and cooling costs. The capacity of the design and construction of these structures will offer architects and builders a cost-efficient solution for net-zero energy and Passive designs. Acoustic protection: The mass of the wood in the MTS panels and specialized wood fiber insulation materials combine to achieve dramatically increased acoustic protection compared with other systems. Seismic strength: Buildings with similar components have been shown to exhibit superior performance to conventional buildings in an earthquake.
 Superior fire performance: CLT materials are highly fire-resistant and maintain tremendous structural integrity under fire combat. Low carbon footprint: CLT materials are exceptionally ‘green’ when compared to competitively performing structural systems in consideration of the embodied energy in the building materials, the high energy efficiency of the CLT thermal envelope, and what will evolve into a carbon-neutral manufacturing process. Healthy living environment: The only components of the CLT building system are wood and non-toxic/non-off gassing glue. CLT building materials do not introduce any toxins into the indoor environment providing a clean indoor air quality. In addition, the CLT wall systems are breathable, which, integrated with appropriate mechanical systems, will result in a healthy indoor environment that maximizes worker productivity and occupant health. Life cycle and future value: The longevity of MTS components ensures that the future value of any structure remains high; buildings are easily altered and remodeled and are also fully recyclable once they reach the end of their useful life. With the utilities located to the interior of the building, not enmeshed with structural and insulating systems, buildings can be easily remodeled including relocating kitchens and bathrooms. Flexibility of design: Cross-laminated timber panels have a high capacity to span as well as curve, providing architects with a high-performing, beautiful structural element for creating exciting new building designs. Speed and predictability of construction: From one-person builders to large construction companies, CLT structural systems will arrive on-site ready to assemble, saving time and money with a swift and accurate building process. Well-defined material specifications: The simple construction specifications of CLT materials facilitate efficient collaboration between architects and engineers. “Vapor diffusion open system”: Moisture management in CLT buildings will be handled by mechanical ventilation systems. The vapor permeable nature of wood allows the material to transfer molecular moisture without trapping it and creating conditions for mold growth. CLT buildings ‘breathe’, minimizing the risk for mold growth. Promotes sustainable forestry practices: The raw materials for the CLT system are sourced exclusively from small and medium diameter timber thinned from the forest, as well as fire and bug-killed salvage timber. This responsible cultivation practice maintains and even enhances the long-term productivity and health of the forest. Superior use of low-grade timber resources: CLT components can be manufactured from low-grade timber resources that otherwise would likely be converted to or consumed as fuel. By using this resource as building materials instead of fuel, CLT buildings will effectively sequester carbon that otherwise would be released during decomposition or fire events. Using this timber as the primary raw material for its products is the most environmentally-friendly way to use this resource, which needs to be harvested in order to maintain the health and vitality of the source forests.