Global warming, thirst, environmental pollution and rapid depletion of natural resources have brought about the construction of environmentally friendly buildings in the construction sector. While the interest in environmentally friendly building has increased, buildings known as green buildings have emerged. Green buildings, which have been certified by certain standards, have created a new orientation and a sector towards a more valuable, energy saving, respectful to nature, ecological, comfortable and to buildings that reduce energy consumption.
The title ‘Green Building’ for buildings is given according to the selection of the location, its design, the features of the innovative building materials used in the building, the construction technique, and the re-use of waste materials.
The most important of these standards, also called the ‘Green Building Certification Systems’, are the LEED standards developed by the U.S. Green Building Council in the USA, the BREEAM standards published by the Building Research Establishment in England, and the standards published by the German Society for Sustainable Construction in Germany.
What are the benefits of the Green Building?
• Increase of ecological value of the property
• Saving half of the water in landscape areas by various methods
• Adding value to urban living spaces
• Adding value to the building
• Decrease of operating costs
• Decrease of long-term effects of the building to the environment
• Minimization of natural environment damage during construction
• Providing environment for use and develeopment of clean Technologies
• Evaluation of waste material arising from excavation
• The treatment of rain water through the ‘Green Roof’ application
• To lower the burden of the sewage system by using rain water
• Ensure that the building’s technical services are given at the optimum level and to increase the building performance
• To store recyclable material
• To benefit from solar energy
• To benefit from natural light
• Green layers reflect the sun’s rays and reduce the reflections of the greenhouse effect
• To save energy
• To produce oxygen through the green layers
• To reduce the warming/cooling costs and the carbon dioxide release through isolation systems
Green Building and Costs in terms of Engineering
An increase of between 1% and 7% is added to the investment cost of sustainable buildings. A large part of this cost is due to special architectural design and innovative energy modeling. In addition to the cost of the consultancy services, the cost of the sustainable building also varies according to the location of the building, the building function and the local climate conditions. The earlier the sustainable building criteria is included in the design process, the lower the costs are.
In fact, the financial benefits of the sustainable building (assessment of initial investment and operation, maintenance costs), a multiple of the cost of the building, and the benefits described on the previous page, show that this is not a disadvantage in the first place.
In fact, for energy efficiency in Turkey what needs to be done isn’t just about making insulation in exisitng buildings. The energy consumption of a building is directly related to the design of the building. Today, the buildings used as residential buildings in Turkey have low energy efficiency. As shown before, the decisions taken in the early stages of the building design have an important role in increasing the energy efficiency.
Measures taken on a low energy-efficient building later, have a small effect on the energy efficiency.
Regarding the Green Building certification in our country, the LEED is mentioned often, rather than that, there aren’t mentioned other applications. In this, the awareness of future changes play an important role.
For a building to obtain the title of the green building, the design of the building, the selective treatment of the building materials and the selective system of quality materials are required. This means that the cost will increase.
With the increase in the value of the building and the savings in energy consumption, the increased cost becomes insignificant. Especially in the architectural design process, the right decision can be tried to be balanced by keeping the cost at optimum level. As a result of the surveys, it has been calculated that environment friendly buildings increase the costs between 5% and 10%, while the long-term energy savings cause 50% -70% of cost reduction.
The standardization of the green building certification process should be implemented legally. In this way, application areas and awareness rates will increase. Our country should look at the building sector from this perspective and should be aware that the competitiveness in the future is highly dependent on the decisions made today.