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Sustainable Buildings

The chemical composition of all building materials used in Stockholm Royal Seaport is checked based on the precautionary principle. Good indoor climates, equivalent to Miljöbyggnad Gold Standard – a national Swedish certification system to ensure sustainable buildings – are required to be met in all buildings. Every building contains between 100 and 400 products.

3.7 Good indoor climates

To ensure good indoor climates, quality assurance during construction and demand-controlled ventilation are crucial factors. Levels of daylight are affected by the city structure. Early collaboration between architects, and energy and indoor environment experts is therefore extremely important.

80 per cent of developers achieve gold standard for indoor climate indicators. Deviations that have arisen are primarily related to thermal climate during summer months and daylight.

A particular challenge in Södra Värtan and Valparaiso is low-frequency noise from ships docked at the nearby port. There are currently no approved types of windows on the market that counteract low frequency noise. In order to be able to build homes and schools in southern and central parts of Södra Värtan and in Valparaiso, noise from ferries needs to be shielded. New office buildings therefore also function as a noise screen.

Buildings’ indoor climate

Requirements:
From the Norra 2 phase onwards, gold standard is to be met for indoor climates.

To ensure good indoor climates, buildings are required to meet gold standard aggregated (jointly weighted) from nine indoor climate indicators including legionella, radon, ventilation, sound, moisture, nitrogen dioxide, thermal climate in summer and winter, and daylight. Experience suggests that the earlier co-operation occurs between architects, energy and indoor environment experts, the more likely it is that all indoor environment requirements are met. The greatest challenge in a dense urban area is access to daylight. Another challenge for developers has been achieving more than silver standard for sound and nitrogen dioxide due to nearby streets and a thermal climate in summer months because of solar heat loads, see table 3.10.

Table 3.10 Gold standard indoors, per phase.

EtappNorra 2BrofästetGasverket VästraJackproppenSödra Värtan
Norra 2BrofästetGasverket VästraJackproppenSödra Värtan
StatusCompletedOngoingOngoingOngoingOngoing
Achieves Miljöbyggnad Gold standard for indoor climate5 of 98 of 96 of 71 of 13 of 3
Norra 2

Two out of nine developers have requested deviation from the daylight requirement due to the city structure of the area. All developers have succeeded in balancing daylight and thermal climate in summer with low energy use requirement with the help of, for example, window positioning, shade from balconies, and free cooling. Developers have also worked actively to combat radon- and moisture in buildings and during the construction process itself.


Brofästet

All developers in Brofästet achieved an aggregated gold standard for indoor climate indicators. Specific indoor climate indicators that developers failed to achieve gold standard in included daylight, thermal climate in summer, nitrogen dioxide levels, and sound due to proximity to busy streets.


Gasverket Västra

All buildings apart from one in Gasverket Västra achieved an aggregated gold standard for indoor environments. Similar to other phases, it is primarily indicators for daylight and thermal summer climate that require the most work. Due to their cultural and historical significance, many of the existing buildings in Gasverket Västra have limited scope to affect, for example, daylight and thermal climate. Developers have, however, worked to achieve the best possible results for all indicators: sound, radon, ventilation, traffic levels, moisture, indoor climate, daylight, and legionella, which are required for good indoor climates.

SISAB (Bobergskolan)
New buildings have been connected to the existing building via a link building. The school has several open environments, which has created specific requirements in terms of good acoustics. The indoor climate in the building has been simulated to ensure good indoor climate in summer and winter. Assessments of solar radiation variation are challenging so that variation in solar migration during the year is taken into account. The buildings have been moisture-safety designed according to Building F, which means that moisture-critical constructions are identified and handled systematically. The building achieves gold level for indoor climate.

Real Estate Administration (Hjorthagshallen sports hall)
The building has three floors containing a large sports hall, changing rooms, kitchens, dining areas, stands and more. The hall can accommodate 300 people, including athletes and spectators. The venue is used for indoor sports with changing rooms and showers that create moisture and an additional moisture content to indoor air. A moisture protection description has therefore been followed to increase the quality of the project’s moisture protection work and to present the customer’s requirements for moisture safety. The building has also been constructed as a radon-protected building. All piping and cabling that transverses the base plate are radon-protected. The building achieves gold level for indoor climates.

Vectura (Pre-school – Building 11)
A blue-graded warehouse from 1909 has been converted into a pre-school on one floor with technical spaces in an attic space. The building has also been extended. The pre-school has a creative floor plan that prioritizes openness between departments and rooms. It incorporates open spaces, toilets, playrooms, conservatories, kitchens, hygiene rooms, cloakrooms, fan rooms and administrative spaces. Considerable focus has been put on achieving a good indoor climate. This has been achieved through well-insulated walls and windows. There is also a setting for warmer indoor temperatures in winter. As a result, the building achieves gold level for indoor climates.

Region Stockholm, Traffic Administration (Stockholm Transport Museum – Building 9)
The building consists of four floors that have been renovated and rebuilt to meet the Stockholm Transport Museum’s requirements prior to its opening in 2021. During the renovation, considerable emphasis was placed on the location of different work spaces to maximise daylight. The building’s older windows have been supplemented with insulating glass to meet energy requirements. Daylight has thus been maximised from existing windows in the outer wall to rooms where people congregate. With these additions, the building finally achieves silver level for indoor climates.

CA Fastigheter (Klätterverket – Building 7)
Klätterverket is working actively to ensure that all visitors are comfortable. During the actual climb, you do not want it to be too warm as this impairs performance in several ways. Good friction is important. In the design of the ventilation system, measures were therefore taken to ensure that equivalent temperatures are always optimal. Different types of window ventilation are possible in summer and winter. In winter, ventilation and heating can be adapted to the weather, occupancy and activity. The building has therefore achieved gold level for indoor climates.

Development Administration (Gasklocka 2)
A new cultural destination is planned for Gasklocka 2, including a 2,000-seater event venue and an eating area on the top floor, with a ceiling height of 14 metres, that has capacity for 1,000 people. Achieving a good indoor climate is especially important here, and several calculations have been carried out to assess that climate regulations are met. A climate assessment to investigate what climate is obtained in a scenario corresponding to a rock concert has been carried out for the performance saloon. Supply air temperatures and ventilation flows have been taken into account to see which room temperature is obtained in different operating scenarios. The building is expected to be completed in 2025 and the goal is set to achieve gold level for indoor climates.


Jackproppen

Thermal summer climate has been a challenge for the playground building due to its large window area. To achieve gold standard, the building will be fitted with sunscreens.


Södra Värtan Norra

The three developers that have reported preliminary design documentation to date are striving for gold level in indoor climates. A challenge in Södra Värtan is low-frequency noise from ships docked at the nearby port. There are currently no approved types of windows on the market that counteract low frequency noise.

What the residents think

The 2019 resident survey shows that 93 per cent of residents feel that access to daylight is generally good or extremely good, while 81 per cent describe the air quality and 58 per cent the temperature of their home as extremely good or fairly good. See pie charts 3.21 and 3.22 below.

Diagram 3.21 What do you think about the quality of the air in your home in general?

Diagram 3.22 What do you think about the temperature of your home in general?

Residents were primarily irritated by noise from construction sites. See table 3.23.

Diagram 3.23 If you think about the past 12 months and make an overall judgement of how it has been when you have been home (inside and outside), how much have you been disturbed or irritated by…


See how targets have been met
MålUppföljningsmått
TargetKPI
3.7 Sound indoor climate in terms of design and building use80% of developers meet gold standard for indoor environments.

3.8 Sustainable selection of building materials

Tile facades in phase Norra 2.

The chemical composition of all building materials used in Stockholm Royal Seaport is checked based on the precautionary principle.

All developers and the City of Stockholm’s contractors use one of the national assessment systems, document building material, and report any deviations. Currently, requirements are not imposed on temporary materials such as scaffolding, construction fences, and temporary lighting poles.

Material selection

Requirements:

  • From Norra 2 onwards, products are required to meet content and documentation standards equivalent to the national assessment system. PVC, hormone-disrupting substances and zinc and copper are avoided. All products must be documented in a digital logbook. This also applies to the procurement of contractors. Norra 1 and Västra had voluntary commitments.
  • Product content must be declared in a construction product declaration and checked against national environmental assessment systems according to chemical content and lifecycle criteria and documented in a digital logbook.
  • If material requirements fail to be met, the City of Stockholm decides to approve or reject the deviation. A deviation is approved when alternatives are unavailable (deviation). A deviation is not approved if a requirement has not been addressed.
Development sites

Every building contains between 100 and 400 unique products. Experience shows that a large number of deviations can be a sign that a developer or contractor has a systematic approach to managing issues that cause them. However, it is possible that materials that do not meet the requirements are used without the City of Stockholm’s approval and these are always treated as a deviation. Read more in table 3.11.

Table 3.11 Non-approved deviations for materials due to chemical content, developers

KravAvsteg/avvikelserMotivering
RequirementDeviationReason
Products that should be avoided according to the national assessment system and other substances that may not be present Halogenated products (blinds)Lack of alternatives
Phase-out substances (anti-corrosion paint, valves, sprinklers)Lack of alternatives, discovered after installation, historical reasons
Hormone-disrupting substances (chemical products, kitchen fittings, fire blankets, roof drainage)Functional, lack of alternatives, substance included in manufacture but not in end-product
Zink (facade, paint)Lack of facade alternatives, historical reasons, discovered after installation
Copper (no deviations)
No content information available(Insulation)Awaiting assessment
Public open spaces

Between 30 and 100 unique products are used in construction projects on public open spaces.

Experience shows that a large number of deviations can be a sign that a developer or contractor has a systematic approach to managing issues that cause them. However, it is possible that materials that do not meet the requirements are used without the City of Stockholm’s approval and these are always treated as a deviation. Fuels and other consumable chemicals are also documented on public open areas, which often gives rise to deviations. Deviations arise due to lack of knowledge of environmental assessment among suppliers. Outdoor lighting and other electronics in particular are often complex materials due to the amount of substances they include as well as extended supply chains. In collaboration with the Traffic Administration’s lighting unit and the Byggvarubedömningen (National environmental assessment tool for building materials), the amount of environmentally assessed lighting material increased during the year. Read more in table 3.12.

Table 3.12 Deviations in building materials due to chemical content, contractors open public spaces

KravAvsteg/avvikelserMotivering
TargetDeviationReason
Products that should be avoided according to the national assessment system and other substances that may not be presentHalogenated products (ball valves, manhole covers)Lack of alternatives
Phase-out substances Functional, alternatives unavailable
Hormone-disrupting substances (cables)Functional
Zink (posts, bollards, bicycle racks, benches)Functional, prescribed in the City of Stockholm’s furniture programme and technical handbook
Copper (no deviation)
No content information available (insulation, chemical products)Difficulty in getting supplier to assess the product, awaiting assessment

9 Byggvarubedömningen, SundaHus, BASTA.
10 Zinc and copper may not come into contact with water in open systems.

To help improve working conditions in the production of natural stone, ethical requirements are included in procurement agreements with contractors. In 2020, all stone purchases were checked, and requirements were met with the exception of a contract in which no requirements were set, and no documentation was available to assess whether requirements were met.

Contactors are also required to conduct a self-assessment on ethical responsibility in the supply chain. Results show that contactors are working on this issue to varying degrees. Some contactors have a systematic approach and requirements in the shape of supplier codes of conduct. However, in general, systematic approaches to ensure an ethical for supply chain for materials are lacking.

To reduce the amount of environmentally hazardous materials that also pose a health risk and reduce the spread of micro-plastics, a requirement to reduce the use of artificial grass and rubber asphalt has been introduced. Where these types of materials are needed, stricter chemical requirements have been introduced. Requirements have also been introduced for developers in the area in 2020.

Pressure treated timber must not be used in the area. Wood that is used must be FSC- or PEFC-certified. During the year, monitoring routines were further improved to increase the traceability of wood used in Stockholm Royal Seaport. The wood certifications used are recognized as the most far-reaching in the forestry sector. However, they have been criticised for being inadequate, having requirements that are too low, and a lack of review mechanisms.

In 2020, Stockholm Royal Seaport reviewed different wood types and wood preservatives to evaluate function as well as ethical and environmental risks for various types of wood for site-built outdoor wooden structures. This work has included co-ordination with representatives of City of Stockholm administrations and companies. The City of Stockholm will use the basis of these efforts to develop requirements to minimise risks for forestry products purchased in terms of legality, impact on biodiversity, and the rights of indigenous people.

Natural gravel is a finite resource. To reduce the use of natural gravel, a requirement has been introduced that limits the proportion of natural gravel in ballast to a maximum of 25 per cent. The requirement has been met for ballast in structures cast on site and must also be scaled up to apply to factory-cast products such as concrete slabs and prefabricated building sections in future projects.

See how goals have been met
MålUppföljningsmått
TargetKPI
3.8 Sustainable selection of building materials Proportion of non-approved deviation of total registered deviations: developers: 22%, public spaces: 13%. 100% of developers and City of Stockholm contractors document materials in digital logbooks.
100% of wood used is FSC certified, 100% of natural stone used meets City of Stockholm ethical requirements.
Review of environmental and social aspects of wood in outdoor construction.

3.9 Robust construction

The built environment is supposed to last over time which requires buildings and facilities to have high-quality design. In 2019, a lifecycle cost analysis (LCCA) of waste bins in public places was conducted. The analysis shows that bins connected to the vacuum waste disposal systems are the most cost-efficient alternative compared to conventional bins and solar panel-powered self-compacting bins. Read more


See how goals have been met
MålUppföljningsmått
TargetKPI
3.9 Support robust constructionLCCA-based fall protection and waste bins connected to the vacuum waste collection system in 2019.
Updated 2021-10-13

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Key figures:

  • 80% of developers achieve Miljöbyggnad Gold level for indoor climate.
  • 81% of the residents feel that the air quality is very or quite good in their home.