[New Paper] Water permeability, water retention capacity, and thermal resistance of green roof layers made with recycled and artificial aggregates

Water permeability and water retention capacity are other critical indicators for green roofs. The shape and type of materials used in green roof drainage and substrate layers significantly impact energy efficiency and rooftop water evacuation. The German FLL guidelines [1] are internationally recognized and widely used to measure the water permeability (estimating drainage) for the green roof substrate layer. Therefore, in this research, a comparative study on the water retention and thermal resistance of different granular materials as the green roof drainage layer was performed in which the Rc-value of a green roof system with drainage layers is made up of granular coarse aggregates. The water drainage and water holding capacity of commercial substrate and drainage materials including coarse recycled and artificial aggregates were also measured.

[1] FLL, Guidelines for the Planning, Construction and Maintenance of Green Roofing: Green Roofing Guideline, Forschungsgesellschaft Landschaftsentwickung Landschaftsbau, 2008.

The paper is part of the CityRoof project. CityRoof aims to develop analogous green roofs for delivering ecosystem services in the urban environment. The project will contribute by improving the sustainability of the built environment through the integration of recycled materials within green roofs. Furthermore, the potential impact of green roofs on the urban heat island effect and water runoff will be assessed at the city scale.

Citation: Kazemi, M., Courard, L., & Attia, S. (2022). Water permeability, water retention capacity, and thermal resistance of green roof layers made with recycled and artificial aggregates. Building and Environment, 109776.

📣 Read and share the 📄 article. The paper is available in Open Access format: https://lnkd.in/e9RkmHfn

The article was published by Mostafa Kazemi, Luc Courard, and Shady Attia.

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