Case study investigation of the building physical properties of seven different green roof systems

Scharf, Bernhard; Zluwa, Irene

doi:10.1016/j.enbuild.2017.06.050

Cited by 32 publications

(25 citation statements)

References 12 publications

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“…In Scharf and Zluwa [73], the insulating properties of seven different green roof constructions in Austria were tested over a five-year period. U-values were generally (but not universally) higher (worse) in winter than in summer.…”

Section: Insulationmentioning

confidence: 99%

Performance of Blue-Green Roofs in Cold Climates: A Scoping Review

et al. 2018

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Green and blue-green roofs are emerging as an increasingly popular feature of rooftops, particularly in urban areas. Particular problematic conditions render their usage complex in the Nordic countries. In order to ensure that green roofs are built durable and with the service life expected of them, it is important to know all the relevant factors surrounding their construction and operation. A scoping study was conducted in order to gain an overview on green roof research and available scientific literature. One hundred articles of particular interest for Nordic climates were retrieved and their findings summarized. It is found that the vast majority of green roof research has been conducted on a theoretical basis, or with practical measurements on green roof test beds or isolated components. There is scarcely any literature on the operation of full-scale, building-implemented green roofs, and no articles were found on the building technical performance of aged green roofs. These knowledge gaps indicate a major risk factor in green roof operation, as their performance and integrity over time has not been documented. This despite the fact that green roofs have been implemented and in operation worldwide for decades.

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Section: Insulationmentioning

confidence: 99%

Performance of Blue-Green Roofs in Cold Climates: A Scoping Review

et al. 2018

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“…Nevertheless, the applied assessment method provided understandable and plausible values regarding the investigated effects of green roofs in summer. A comparison with existing related papers and projects [21,27,28,[33][34][35][36]40,42,56] shows that the produced results sound feasible and can be definitely realistic, due to various outdoor and indoor field measurements of green roof impacts on the environment, human thermal comfort and the building.…”

Section: Greenpass ® Methodsmentioning

confidence: 92%

“…Building physical investigations of green roofs regularly reveal their building physical potential. Papers and scientific thesis as published by Scharf and Zluwa [40], Pitha et al [21], Mattuschka [35], amongst others [32][33][34]41] showed comparable effects for green roofs. The papers point out that the improvement of the insulation properties of buildings obviously correlates to the initial situation.…”

Section: Urban Challenge Of Energy: Indoor Air Temperature and Energymentioning

confidence: 99%

“…The effects of green roofs on the insulation properties of the building envelope are noticed by many papers [18,[32][33][34][35]. Also, positive effects on the microclimate have been investigated and published [27,32,[36][37][38][39][40], very often linked to the green roof typology, e.g., an extensive green roof. Recently, a long-term investigation of an extensive green roof has been published that shows a minor but clear impact on the microclimate [41].…”

Section: Introductionmentioning

confidence: 99%

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Green Roofs and Greenpass

Scharf

Kraus²

2019

Buildings

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The United Nations have identified climate change as the greatest threat to human life. As current research shows, urban areas are more vulnerable to climate change than rural areas. Numerous people are affected by climate change in their daily life, health and well-being. The need to react is undisputed and has led to numerous guidelines and directives for urban climate adaptation. Plants are commonly mentioned and recommended as one key to urban climate adaptation. Due to shading of open space and building surfaces, as well as evapotranspiration, plants reduce the energy load on the urban fabric and increase thermal comfort and climate resilience amongst many other ecosystem services. Plants, therefore, are described as green infrastructure (GI), because of the beneficial effects they provide. Extensive green roofs are often discussed regarding their impact on thermal comfort for pedestrians and physical properties of buildings. By means of Stadslab2050 project Elief Playhouse in Antwerp, Belgium, a single-story building in the courtyard of a perimeter block, the effects of different extensive green roof designs (A and B) on the microclimate, human comfort at ground and roof level, as well as building physics are analyzed and compared to the actual roofing (bitumen membrane) as the Status Quo variant. For the analyses and evaluation of the different designs the innovative Green Performance Assessment System (GREENPASS®) method has been chosen. The planning tool combines spatial and volumetric analyses with complex 3D microclimate simulations to calculate key performance indicators such as thermal comfort score, thermal storage score, thermal load score, run-off and carbon sequestration. Complementary maps and graphs are compiled. Overall, the chosen method allows to understand, compare and optimize project designs and performance. The results for the Elief Playhouse show that the implementation of green roofs serves a slight contribution to the urban energy balance but a huge impact on the building and humans. Variant B with entire greening performs better in all considered indicators, than the less greened design Variant A and the actual Status Quo. Variant B will probably bring a greater cost/benefit than Variant A and is thus recommended.

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“…In recent decades, economic growth and technological development accelerated the excessive use of conventional forms of energy, resulting in increased emissions and leading to the ongoing destruction of the natural environment and its accommodated ecosystems. At the Mediterranean basin, in general, and in the Greek context, in particular, a developed, vivid, and extensive literature has been developed on the impacts of energy consumption and possible policies to plan and control energy consumption to alleviate the environmental pollution caused by the ongoing overexploitation of fossil fuels for energy production [1][2][3][4][5]. In the built environment of the Mediterranean basin, it is noteworthy that predictions made by bioclimatic indices differ from actual thermal pleasure, thus, research has been focused on assessing such commonly-used bioclimatic indices that unveil human thermal pleasure, mostly identifying simulated thermal pleasure in a Mediterranean urban environment [6].…”

Section: Introductionmentioning

confidence: 99%

Investigating Thermal Performance of Residential Buildings in Marmari Region, South Evia, Greece

et al. 2020

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In recent decades, the steady increase of energy consumption from building construction and operations cause atmospheric pollution and significant financial burden, mainly due to the high costs imposed from energy production. This study examines ways under which modern designs of a building can be applied on construction and domestication while following conventional methods of construction, compared to a building that has been constructed and domesticated under bioclimatic architecture. Particularly, two buildings were investigated in terms of the energy consumption incurred, being built on the same seaside area and period of construction and at adjacent plots of the same distance from sea for ease of comparison. The first building (A1) was constructed under the principles of bioclimatic architecture, being also facilitated with green and smart technologies. The second building (A2) was constructed under conventional construction techniques. The energy efficiency of both buildings was calculated by the “TEE KENAK” software, while specific parameters were recorded. Energy classifications of both buildings were valued and a proposed scenario and interventions unveiled the energy classification upgrading from A2 to A1. Our analysis revealed, as also found in the literature, that during thermal energy oscillating conditions, corresponding relative humidity stresses were observed, indicating that the vapor pressure handling should be taken into account towards comfort. The preliminary incremental cost evaluation and comparison of A1 and A2 energy upgrading under the criterion of simple payback period were critically discussed.

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Case study investigation of the building physical properties of seven different green roof systems

Cited by 32 publications

References 12 publications

Performance of Blue-Green Roofs in Cold Climates: A Scoping Review

Performance of Blue-Green Roofs in Cold Climates: A Scoping Review

Green Roofs and Greenpass

Investigating Thermal Performance of Residential Buildings in Marmari Region, South Evia, Greece

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