Technological advances in construction have encouraged the adoption of environmentally friendly and sustainable building materials. One such material is cross-laminated timber (CLT), which has outstanding structural, environmental, earthquake-resistant and thermal properties. In this blog, we will highlight the characteristics of CLT, as well as the comparative advantages of houses built from CLT compared to conventional steel and concrete materials. Furthermore, we will present statistical data on carbon emissions associated with each type of material to highlight the positive environmental significance of CLT.
What is CLT construction technology?
Cross-laminated timber, or CLT, is a structural composite wood product characterized by its characteristic laminated construction. It consists of multiple layers of dimensionally stable wood planks, typically three to seven layers, that are systematically oriented perpendicular to each other. The layers are bonded together with environmentally friendly adhesives, resulting in a strong, engineered wood panel with outstanding mechanical properties.
The place of use of the panel depends on the method of production, orientation of the lamellas and bonding of the layers.
Panels that are manufactured with the final layer perpendicular to the production length are most often used in the construction of walls, while panels with the final layer parallel to the production length are most often used for slabs and roofs.
Why choose a prefabricated house made using CLT technology over houses made of steel or concrete?
- Structural integrity and efficiency:
CLT panels, due to their cross structure, exhibit outstanding structural integrity. They have strength that can rival traditional materials like steel and concrete, making them ideal for a variety of heavy-duty applications. Prefab houses made of CLT not only have a smaller ecological footprint, but are resistant to heavy loads and earthquakes, making it the ideal material for this application.
- Fire resistance:
Contrary to common misconceptions, CLT exhibits excellent fire resistance. Its thickness and density prevent the penetration of flames, and in the event of a fire, CLT develops a layer that acts as a natural fire barrier, thus providing additional protection. - Lightweight versatility and economy:
The light nature of CLT panels makes them easy to use. Their versatile application enables quick and economical assembly, which results in reduced construction time and lower operating costs. - Thermal characteristics and rational use of energy:
The outstanding thermal insulation properties of CLT improve energy efficiency within homes. This results in reduced energy consumption for heating and cooling, thereby minimizing operating costs for homeowners. - Aesthetics:
The natural wood finish of CLT adds warmth and aesthetic appeal to prefabricated houses, enhancing their visual appeal and comfort. - Sustainability:
The fundamental reason for the appeal of CLT is its sustainability. Wood, as a renewable resource, absorbs carbon dioxide (CO2) during its growth, making CLT a carbon neutral material. In contrast, the production of steel and concrete results in significant CO2 emissions, which significantly contributes to the environmental impact of the construction sector.
Carbon emissions
To fully understand the environmental benefits of CLT, it is important to analyze the carbon emissions associated with the production and use of steel, concrete, and wood. The following statistics shed light on the environmental impact of these materials.
- Concrete:
The production of one ton of cement, a key ingredient in concrete, emits approximately one ton of CO2 into the atmosphere. Globally, the cement industry is responsible for 7% of all CO2 emissions. Concrete production is responsible for approximately 8% of the world’s carbon dioxide emissions. - Steel:
The steel industry is one of the largest industrial sources of CO2 emissions. For every ton of steel produced, approximately two tons of CO2 are emitted. Steel production accounts for approximately 7-9% of total global carbon dioxide emissions. - Wood
Wood is carbon neutral, as trees absorb CO2 during their growth. The overall carbon footprint of CLT is significantly lower than that of concrete or steel. CLT has the potential to reduce CO2 emissions in the construction industry by a significant amount.
These figures clearly indicate that concrete and steel production is carbon intensive, contributing significantly to greenhouse gas emissions. In contrast, CLT, as a renewable and carbon-neutral material, offers a clear advantage in terms of sustainability and environmental friendliness
What can we conclude about CLT construction?
Cross laminated timber (CLT) represents an important innovation in the construction industry, offering a sustainable, technically superior alternative to conventional steel and concrete materials. Its outstanding structural and anti-seismic properties, along with minimal environmental impact, make it an ideal choice for prefabricated houses , modular homes , sanitary cells and various construction applications.
By analyzing statistical data on carbon emissions, it is clear that CLT represents an innovation in sustainability, significantly reducing the carbon footprint of the construction sector. Its advantages include structural integrity, insulating properties and environmental friendliness, making it an ideal material for construction and in the future.
The use of CLT is constantly growing and is actively reshaping our prefabricated houses. On top of that, CLT also provides structurally sound and energy efficient constructions, and a sustainable and environmentally responsible future for generations to come. Embracing CLT technology is not just a technological advance – it is a step towards a greener and more resilient planet.