Quantification of Water Flux and Insulation Dynamic of Newly Roof Structures with Recycled Materials

Quantification of Water Flux and Insulation Dynamic of Newly Roof Structures with Recycled Materials

PhD candidate: Mostafa Kazemi

Supervisor: Luc Courard

The project is coordinated by Prof. Grégory Mahy of the Faculté Gembloux AgroBio-Tech of the University of Liège, Prof. Jacques Teller for LEMA and Prof. Luc Courard from GEMME Building Materials group.
Financing: The total budget of the project is 764.850€. The project is financed by an ARC research grant.
Duration: 4 years (starting March 2020)


Over the past few decades, the energy consumption of houses and building sectors has raised some concerns owing to rapid urbanization growth. Therefore, the reduction of energy demand in this area is a priority in the construction industry to enhance new structures' insulation dynamic. Some researchers have proposed the replacement of common flat roofs with green roofs to improve the performance and energy savings in the building sector. Among different types of green roofs, the extensive green roof has shallow substrate layer and require less maintenance; so, it has been proposed to be used in the building sector. Although some researches have been carried out on green roof systems' insulation performance, few studies have assessed and simulated the hygrothermal conditions of green roof layers, mainly including coarse recycled materials. Therefore, the main objectives of the PhD thesis are:

·         To benchmark coarse recycled materials suitable for analogous green roof implementation.

·         To assess the thermal performance of green roof layers including coarse recycled materials (proposed design) and then compare their results with green roof layers including natural materials (baseline design).

·         To model the hygrothermal properties of green roof layers and then optimize the substrate and drainage layers.
·          To apply the outside weather conditions of Liège city to green roof models to assess their insulation performance.

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Fig. 4. A cross sectional view of green roof layers including substrate and drainage layers.



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