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- Selection of materials and good in-door environment
Selection of materials and good in-door environment
All material used in Stockholm Royal Seaport is checked from a chemical point of view, on the basis of the precautionary principle ¹. For good indoor environment, the National Swedish certification system to ensure sustainable buildings, Gold level, will be achieved for indoor environment in all buildings. Each building contains between 100-400 products.
Material choice from a chemical point of view
Requirements:
- From Norra 2 onwards, the materials must meet requirements on content and documentation corresponding in accordance with criteria on contents in national rating systems. PVC, endocrine disruptors, as well as zinc and copper, must not be used. All materials shall be documented in a digital logbook.
- Norra 1 and Västra have voluntary commitments.
Built-in materials are checked against national assessment systems and documented in a digital logbook. If the material requirements are not met, the city decides to either approve a so-called non-compliance, or non-approve it. Non-compliances can be approved e.g. when there is no alternative. Non-compliances that are non-approved arise if the requirement has not been attended to.
Experience shows that a large number of deviations is a signal that the developer has a systematic approach to catching these.
Of the eleven projects underway on public space all deviations are approved in regard to construction material. Developers have reported 32 non-approved deviations and 28 approved deviations, see table below. For more detailed information about deviations as regards chemical substances, see tables 3.7 and 3.8.
Table 3.6 Deviations regarding material requirements per phase
| Etapp | Norra 2 | Brofästet | Gasverket västra och lilla | Jackproppen | Södra Värtan | |
|---|---|---|---|---|---|---|
| Totalt | Norra 2 | Brofästet | Gasverket Västra | Jackproppen | Södra Värtan | |
| Status | Deviations | Completed | Ongoing | Ongoing | Ongoing | Ongoing |
| Amount of deviations material requirements, property developers | 31 | 1 | 18 | 11 | 1 | 1 |
| Amount of deviations material requirements, public open space | 0 | 0 | – | – | 0 | 0 |
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Table 3.7 Deviations on material regarding chemical content, property developers
| Requirements | Deviations | Justification |
|---|---|---|
| Requirements | Deviations | Justification |
| Classified products are avoided in line with national assessment systems, as well as other substances that are not permitted. | Halogenated products (pipes, lighting, carpets, floors, insulation, windows) | No alternatives, quality risk, fire requirements, discovered after installation. |
| Phase-out list substances (pipes, light sources, sealing joints, elevators, sealants, bathtubs, wall sockets, water taps, faucets, valves | No alternatives, functional reasons, discovered after installation | |
| Endocrine disrupters (drain trap, glue, sealants, insulation, lighting, fan unit, towel drying rack etc) | Functional reasons, lack of alternatives, discovered after installation. | |
| Zinc | Functional reasons | |
| Copper (brackets, pipes) | Functional reasons (thermal conduction), no alternatives | |
| No content information | (Fittings, pipes, fire protection tape, clinker) | Discovered after installation, assessment pending |
Table 3.8 Deviations on construction material in regards to chemical content, property developer public spaces
| Requirements | Deviations | Justification |
|---|---|---|
| Requirements | Deviations | Justification |
| Classified products are avoided in line with national assessment systems, as well as other substances that are not permitted | Halogenated products (concrete curing, PVC-tent) | Functional reasons |
| Phase-out list substances (asphalt remediation, photovoltaics bins, road signs, PVC-tent) | Functional reasons, no alternatives | |
| Endocrine disruptors (rubber asphalt, plywood) | Functional reasons | |
| Zinc (no deviations) | ||
| Copper (no deviations) | ||
| Missing content information (fittings, pipes, protection tape, clinker) | Difficulty getting supplier to judge product |
Good indoor environment
Requirements:
- Norra 2 and onwards the level Miljöbyggnad¹ Gold is to be achieved for indoor environment.
¹ Miljöbyggnad is a national Swedish certification system to ensure sustainable buildings, managed by Sweden Green Building Council.
To ensure a good indoor environment, requirements are made that buildings should achieve the aggregate level of Miljöbyggnad Gold based on the indoor environment. The earlier collaboration between the architects and experts on energy and indoor environment begins, the greater the probability that all indoor environment requirements are met. The biggest challenge in a densely constructed city is daylight. In addition to daylight, the main challenge for the developers is to achieve a higher score than Silver in regard to sound and nitrogen dioxide, this because of nearby streets, as well as thermal climate, see table 3.9.
Table 3.9 Gold rating indoor level per phase.
| Etapp | Norra 2 | Brofästet | Gasverket västra och lilla | Jackproppen | Gasklocka 4 |
|---|---|---|---|---|---|
| Norra 2 | Brofästet | Gasverket Västra | Jackproppen | Gasklocka 4 | |
| Status | Completed | Ongoing | Ongoing | Ongoing | Ongoing |
| Indoor environment, Gold rating | 7 av 9 | 9 av 9 | 3 av 3 | 2 av 2 | 1 av 1 |
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Indoor environment per phase
Two of nine developers have been granted certain non-compliances from the daylight requirement due to planned city structures in the area. All developers have managed to balance daylight and thermal climate in summer with low energy use, by way of, for example, window placements, shady balconies, and cooling systems. Developers have also worked actively on water safety, both in design and in construction.
All property developers in Brofästet achieve Gold level, based on the indoor environment indicators, but even here, the developers have had difficulties meeting the daylight requirement because of adjacent buildings.
The indoor environmental criteria’s that most developers only achieve level Silver include, natural light, thermal climate in winter and nitrogen dioxide, as well as sound requirements, due to the proximity to busy streets.
In Gasverket, the buildings that have submitted their documents have achieved a Gold level in regard to the indoor environment criterias. As with the other stages only level Silver is achieved for daylight and thermal climate.
The existing buildings in Gasverket have, due to cultural and historical reasons, limited opportunities to influence daylight and thermal climate.
Norra 1 and Västra, do not have indoor environment requirements.
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Kew figures
- 90% reach Miljöbyggnad Gold for in-door environment
¹ The precautionary principle
According to the rules of consideration in the second chapter of the environmental code, everyone who operates or intends to operate a business must take protective measures and precautions needed to prevent, hinder, or thwart any harm or inconvenience to human health or the environment that the business might cause.