Contribution of green roofs to energy savings in building renovations

Borràs, Júlia G.; Lerma, Carlos; Más, Ángeles; Vercher, José; Gil, Esther

doi:10.1016/j.esd.2022.09.020

Cited by 21 publications

(4 citation statements)

References 28 publications

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“…Hence, the current climate emergency and the growing concern about the deterioration of the urban and rural environment are shaping the course of building research in the attempt to mitigate the ecological impact of buildings and considering their economic and social context [52]. In this sense, large European cities are suffering a progressive increase in their average temperature (heat island effect) [53], while increasing their pollution levels and decreasing air quality [54] and experiencing increasingly frequent violent weather events such as acid rain, floods, droughts or heat waves [55].…”

Section: Critical Discussion and Implications Of The Obtained Resultsmentioning

confidence: 99%

Experimental Study of Indoor Air Quality in Educational Buildings: A Spanish Case Study

Matilla,

Velilla,

Zaragoza-Benzal

et al. 2023

Buildings

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Ensuring good indoor air quality in the spaces within educational centres is essential for the health and academic performance of students. In this sense, studying the evolution of health pollutants and their relationship with the environmental parameters of indoor humidity and temperature presents a challenge for the design of more efficient and comfortable buildings with a lower risk of virus infection. In this work, the relationship between pollution levels and SARS-CoV-2 virus infections in the academic year 2021/22 is shown, comparing the pollution values measured on-site with the value of the official measuring stations of the Community of Madrid. In addition, the impact of ventilation measures implemented during this period is assessed, aiming to establish guidelines for ensuring a safer and healthier school environment. It was found that during winter months, when there is less outdoor ventilation, pollution levels exceeded the recommended limits, according to reference regulations. This highlights the need for interior conditioning strategies in educational spaces. Thus, this multidimensional approach, considering both airborne pollutants and weather conditions, provides a comprehensive perspective on indoor air quality in school buildings in the central area of a metropolitan city, such as the Community of Madrid.

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Section: Critical Discussion and Implications Of The Obtained Resultsmentioning

confidence: 99%

Experimental Study of Indoor Air Quality in Educational Buildings: A Spanish Case Study

Matilla,

Velilla,

Zaragoza-Benzal

et al. 2023

Buildings

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“…Figure 4 summarizes the adopted qualitative values (from 1 to 5, with the worst values in red and the best ones in green) according to the following criteria: be a green roof (NWGREE, 2.12 kN/m 2 ), with the other solutions somewhere between these values. Despite green roofs' good energy performances [24,25], this solution was ruled out for rehabilitation due to its excessive weight. Although the solutions WINVR and WINVAD slightly exceeded the limitation, they were considered, but with some modifications to fulfill the weight requirement.…”

Section: P2 Acoustic Insulationmentioning

confidence: 99%

A Roof Refurbishment Strategy to Improve the Sustainability of Building Stock: A Case Study

Ruá,

Pitarch,

Arín

et al. 2024

Sustainability

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The aging of the building stock in most cities highlights the relevance of refurbishment to achieve sustainability. Current refurbishment practices are often short-sighted and do not encompass holistic strategies beyond energy saving. This research study aims to analyze the factors involved in roof refurbishment versus current decision-making determinants. The objective is to identify the barriers that hinder their implementation and to find arguments to support roof renovations. A multicriteria analysis, which considered environmental, economic and performance factors, was employed to select optimal roof refurbishment solutions. This study evaluated five solutions. With interviews held with construction professionals and a survey of experts and homeowners, the preferences and criteria for making decisions about roof refurbishments were analyzed. Simulation tools were then used to estimate the energy savings, payback periods and environmental impact for a representative building in the study area. The results were extrapolated to a neighborhood level. The results highlight the importance of considering factors, such as weight, cost and user preferences when selecting suitable refurbishment solutions. The findings not only estimate the potential energy savings and carbon emission reductions in the area but also underscore the relevance of roof refurbishments for prolonging a building’s life span to contribute to sustainability.

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“…The results complement previous studies on energy assessment in building roof renovation, as shown in Table 5 with five previous examples. The study by (Borras et al, 2022) reported the installation of three types of building roof renovation including 2 green roofs in 6 different climate zones in Spain. Therefore, a more comprehensive change in building envelope led to a higher reduction in EUI.…”

Section: Figure 3 the Trendline Of Thermal Conductivity And Thickness...mentioning

confidence: 99%

“…(Cai et al, 2019) also provided evidence that green roof was effective in reducing EUI and room temperature. (Borras et al, 2022) Among the three types of roof renovation, showed a decrease in energy consumption by 9% to 13% 2 Thermal and energy performance of green roof and cool roof: A comparison study in Shanghai area (He et al, 2020) Cool roof was superior in reducing room temperature, resulted in more significant electricity savings compared to green roof 3 Inverted roof insulation kits and their durability (Francke and Gerylo, 2018) The decrease in the quality of insulation material was caused by freeze-thaw cycles.…”

Section: Figure 3 the Trendline Of Thermal Conductivity And Thickness...mentioning

confidence: 99%

Effectiveness Analysis of Insulation and Roof Covering Material in Office Flat Roof

Machfudiyanto,

Riantini,

Rachmawati

et al. 2023

IJTech

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Wasteful consumption of electricity in high-rise building in Indonesia is the primary trigger for the increase in carbon emissions. Predominantly, the excessive use of electrical appliances and air conditioning systems is the principal factor contributing to the use of energy within these structures. To effectively address this issue, the importance lies in adopting suitable building envelope material. Therefore, this study aimed to analyze the effectiveness of different insulation types and roof covering in improving the energy-saving performance of office building. There were six proposed renovation for the flat roof of building, consisting of two approaches, namely (1) the incorporation of insulation and (2) the replacement of roof covering layers. Scenarios A1, A2, and A3 have incorporated 100 mm of polyurethane (PU) foam, polyisocyanurate (PI) foam, and fiberglass batt into the design. Meanwhile, Scenarios B1, B2, and B3 opted for ceramic material, Ethylene Propylene Diene Terpolymer (EPDM) membrane, and grass vegetation as roofing material for the existing roof. The results showed that the addition of insulation to roof through Insight 360 and the replacement of roof covering layers produced an energy reduction of 19.5% to 20.2% and 19.5% and 23.5%, respectively. The implementation of green roof in scenario B3 was selected as the most promising renovation option, achieving a remarkable 23.5% reduction in energy consumption.

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Contribution of green roofs to energy savings in building renovations

Cited by 21 publications

References 28 publications

Experimental Study of Indoor Air Quality in Educational Buildings: A Spanish Case Study

Experimental Study of Indoor Air Quality in Educational Buildings: A Spanish Case Study

A Roof Refurbishment Strategy to Improve the Sustainability of Building Stock: A Case Study

Effectiveness Analysis of Insulation and Roof Covering Material in Office Flat Roof

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