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The wooden walls without glue they are structural elements that can be used in construction with significant benefits on the environment in terms of reducing net CO2 emissions.
Each cubic meter of wood used as a substitute for another construction material, it allows to reduce carbon dioxide emissions into the atmosphere by an average value of about 1.1 tons. In addition to the 0.9 t stored in the growth phase, this implies that each cubic meter of wood in total removes about 2 tons of CO2 harmful to the environment.
If we consider the requirements of the Kyoto Protocol, an increase of 10% inuse of wood in Europe as a building material it would reduce emissions by about 25%!
The following histogram makes even more evident the different level of CO2 of the materials frequently used in construction compared with wood, which instead of emitting CO2 absorbs it.
To avoid nullifying the benefits of using wood, however, it is essential for companies in the sector to operate with a system that monitors the sustainability of all stages of production and distribution.
This is the case with TAVEGO® , a trademark of Marlegno, an Italian company based in Bolgare, in the province of Bergamo, which created theLife Cycle Assessment (LCA), an analytical method for assessing the environmental impact of materials, construction methods or composite structures, throughout their life, from the extraction of raw materials to production, distribution, use and disposal.
The Life Cycle Assessment has the objective of qualifying and quantifying the impact on the environment with reference to three macro-areas:
- Exhaustion of resources
- Human health
- Conservation of the environment
Within the 3 main macro-areas, the following phenomena are specifically addressed:
● Greenhouse effect (Global Warming Potential)
● Potential depletion of the ozone layer (Ozone Depletion Potential)
● Potential depletion of raw materials
● Potential depletion of energy sources
● Ecotoxicity of water and soil
● Potential acidification
● Toxicity for humans
In the context of the greenhouse effect, one of the main problems is that of carbon dioxide emissions and in particular of the so-called Carbon Footprint.
The phases of the life cycle for calculating the Carbon Footprint, in the case of wood as a construction material, can be summarized in three phases:
- Production phase which includes extraction, transportation and production
- Use phase which includes: use, maintenance and energy consumption
- End of life phase which includes: recovery / reuse, recycling and disposal.
The sustainability of all these phases are monitored by the Marlegno which adds a fundamental virtuous element: the total absence of synthetic glues.
TAVEGO® it is in fact an innovative construction system that allows to realize floors and walls with panels composed of overlapping wooden boards joined together only by wooden connections or screws, without the use of synthetic glues derived from petroleum.
The absence of synthetic glues determines a better conditions of health inside the buildings due to the lack of some harmful products such as formaldehyde or similar.
The structural walls TAVEGO® can be of four types, all without synthetic glues:
- CROSS-D: load-bearing wall with crossed boards connected with beech wood anchors
- ROSS-S: load-bearing wall with crossed tables connected with non-magnetic steel screws
- STACK-W: load-bearing wall with side-by-side boards connected with non-magnetic steel screws and staples and covered with matchboard
- STACK-G: load-bearing wall with side-by-side boards connected with non-magnetic steel screws and staples and covered with plaster fiber
The 4 types of wooden walls without TAVEGO® glue
With the TAVEGO® construction system, Marlegno also produces 4 types of floors:
TAVEGO® wooden walls and floors are subjected to rigorous laboratory tests carried out at the University of Bergamo, such as the one shown in the opening photo of this article.
Among the key elements of TAVEGO® for the purposes of environmental sustainability the use of wood exclusively coming from PEFC certified Italian forests (Pan-European Forest Certification) located within a radius of 220 km from the processing plants.
The forest certification scheme PEFC in Europe it is based on three fundamental principles to ensure sustainability:
1) compliance with the Criteria and Indicators defined in the Ministerial Conferences for the protection of forests in Europe (Helsinki 1993 and Lisbon 1998)
2) the application of recommendations at regional or group level
3) audits and certification entrusted to an independent and accredited third party.
For more information on TAVEGO®, you can visit the dedicated section of the official website of Marlegno at: https://www.marlegno.it