Frequently Asked Questions

Here you will find various frequently asked questions (and answers). Before formulating your own question, search here to see whether your question has already been asked.

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General questions

1. Why does Royal BAM Group wants to achieve a reduction in CO₂ emissions?
2. Why has the BAM CO₂ Desk been founded?
3. Who are the intended users of the BAM CO₂-Desk?
4. What factors contribute to the CO₂ emissions of a company?
5. How has Royal BAM Group calculated its own CO₂ emissions?


Vragen met betrekking tot Bouw en Vastgoed

1. What parts of my building emit CO₂?
2. What should I particular focus on when designing a building?
3. How can I reduce the CO₂ emissions of my building?
4. How can I improve the energy performance coefficient (EPC) of my building?
5. Which sustainable energy technology can be used in the built environment?
6. What does a sustainable building cost?


Vragen met betrekking tot Infra

1. What factors determine the CO₂ emissions of the railways?
2. Asphalt production has high CO₂ emissions. What does Royal BAM Group do to reduce these emissions?
3. What is the opinion of the large road construction clients with respect to reducing the CO₂ emissions?
4. Do lower CO₂ emissions for a project always lead to a higher price?

 

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Answers general questions


1. Why does Royal BAM Group wants to achieve a reduction in CO₂ emissions?

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Royal BAM Group aims to have the most sustainable business operations and therefore CO₂ reduction is receiving additional attention. As when addressing other public themes, collaboration is of essential importance. Collaboration in the chain, both upstream with suppliers and clients, as well as downstream with users, is an absolute necessity to realise the reduction of CO₂ emissions.

2. Why has the BAM CO₂ Desk been founded?

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Companies are increasingly focussing on their energy consumption and the reduction of CO₂ emissions. Firstly, because they know that the central government will develop more stringent legislation and regulations. Secondly, because of the requirements set by society. But also due to the opportunity to achieve good economic performance. Also in the long term. In addition, the company is convinced that corporate social responsibility is beneficial.

Research into the carbon footprint shows that the construction sector has a lot of knowledge in this field. However, it is not used sufficiently actively. Royal BAM Group wants to provide access to the knowledge present in its organisation and make it available to suppliers and clients in the construction sector. The BAM CO₂ Desk has been created for this reason.


3. Who are the intended users of the BAM CO₂-Desk?

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Important target groups are clients and suppliers, who can reduce the CO₂ emissions in the usage phase and in the supplying chain respectively.

Together with its clients, Royal BAM Group wants to aim at CO₂-conscious and in the longer term climate-neutral tendering. Through energy-efficient products and processes, Royal BAM Group will aim to contribute to the reduction of CO₂ emissions in the construction chain.

Suppliers are asked to keep the carbon footprint in the production of raw materials and semi-manufactured products as low as possible. Together with the suppliers, Royal BAM Group wants to consider jointly developing new sustainable products and then implementing them via partnerships or co-makerships.


4. What factors contribute to the CO₂ emissions of a company?

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A company can determine itself where the boundary of its CO₂ emissions lies. The so-called Greenhouse Gas Protocol (GHG-protocol) provides guidance when making choices.

Factors that determine the level of CO₂ emissions are the energy consumption in offices, the vehicle fleet, taking flights and the energy consumption at construction sites and production locations.

The method proposed by Royal BAM Group for calculating the carbon footprint (see downloads symposium), calculates not only the CO₂ emissions of Royal BAM Group itself but also includes the CO₂ emissions upstream (suppliers) as well as downstream (the usage phase of products).


5. How has Royal BAM Group calculated its own CO₂ emissions?

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The CO₂ emissions of Royal BAM Group and the chain were calculated, in collaboration with KPMG, using a Carbon Footprint calculation model that has been specifically developed for this purpose.


Answers Construction and Property


1. What parts of my building emit CO₂?

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The CO₂ emissions consist of the use of energy for lighting, equipment, heating, cooling and lifts. This is the consumption of electricity, gas and/or heat and cold supplied by third parties.

2. What should I particular focus on when designing a building?

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During the entire life of a building, it has been shown that the energy consumption in particular is the determining factor for the environmental impact. Here it is important to first limit the cooling and heating demand, then the lighting and the other energy consumers in the building. Approximately 30% of the energy consumed in a building is user dependent. Adjustment and fine-tuning, monitoring, support and providing information to the user is a substantial aspect of sustainable development.

3. How can I reduce the CO₂ emissions of my building?

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A lot can often be achieved by examining the settings in a logical way. Consider here for instance the times when the building is used and the temperature settings. In addition, in consultation with your installer or mechanical contractor, energy-saving measures can be inventoried. It is advisable and in some cases even obligatory to have an Energy Performance Advice carried out for a residential or non-residential building. This provides direct insight into the current situation, as well as the options for making savings. For residential construction, the Toolkit 'Duurzame Woningverbetering' (sustainable housing improvement) has been created that provides advice on how existing houses can be made more energy efficient.

4. How can I improve the energy performance coefficient (EPC) of my building?

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Dependent on the desired EPC, one can choose from a number of energy-saving techniques or combinations thereof. Several examples are the high-efficiency ZonneGasCombi (combination of solar and gas power), an individual heat pump and increasing the insulation value (Rc) of enclosed parts. Very energy-efficient houses (very low EPC) can be built in accordance with the Passiefhuisconcept (Passive House Concept).

5. Which sustainable energy technology can be used in the built environment?

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Here you can consider: heat and cold storage, thermal solar energy, electrical solar energy, biofuels, energy recovery and high-efficiency equipment. However, a distinction must be made between new construction and renovation. In any case, it is important that specialists in the area of energy-efficient technology are involved in the project at an early stage.

6. What does a sustainable building cost?

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The costs of a sustainable building depend on the desired sustainability level. It is possibly more expensive to make a sustainable building than a conventional building. However, the additional costs are often recovered within a couple of years due to lower energy and maintenance costs.

Important financial aspects that play a role are the type of financing, land costs, how the value of the real estate develops, lessee retention in the future, an acceptable period within which the additional costs can be recovered and the expected development of energy prices.



Answers Civil engineering


1. What factors determine the CO₂ emissions of the railways?

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When railways are constructed, the CO₂ emissions consist of the use of raw materials and semi-manufactured products (for instance concrete sleepers) and the production process. When railways are used, CO₂ emissions occur due to the use of the systems (including signs and points) and the trains using the railway (in particular overcoming the resistance due to friction demands a lot of energy).

2. Asphalt production has high CO₂ emissions. What does Royal BAM Group do to reduce these emissions?

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A current innovation in the production of asphalt is the low energy preparation process. The use of foamed bitumen as a binding agent leads to the same final product at a significantly lower temperature (95 ºC instead of 165 ºC). Using less energy reduces the CO₂ emissions. For every tonne of LEAB (Low Energy Asphalt Concrete), this is a reduction of almost 4 kg of CO₂.

3. What is the opinion of the large road construction clients with respect to reducing the CO₂ emissions?

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The picture here is rather diverse. On the one hand considerable value is attached to lower prices, on the other, the policy objectives of the government are becoming more visible in the specifications/ contracts. Regularly, there are options to reduce the number of 'detour kilometres' and with it the CO₂ emissions by creating fewer diversions, shorter diversions and diversions that are in place for a shorter time.

4. Do lower CO₂ emissions for a project always lead to a higher price?

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Often, additional measures or energy-efficient products will lead to higher costs. But by taking an inventive approach to logistical planning, by buying materials as close as possible to the construction site or by employing personnel from the immediate vicinity, the number of transport kilometres can be limited.

It is striking that in this respect the construction sector underestimates its share of the total CO₂ emissions and overestimates the costs of sustainable building.