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The topic of increased CO2 concentration is very actual in the Czech Republic, especially in the connection to the current effort for a massive revitalization of buildings, which aims to reduce the energy performance of buildings. Both residential and civil buildings revitalization includes predominantly replacement of windows and insulation by the contact system. Exchange of windows and high-quality contact insulation then result in almost no infiltration at all. So, when the forced ventilation is not compulsory ...

Green roofs represent one of the most diffused and representative Low Impact Development techniques (LID). Green roofs consist of a number of layers, including a vegetation layer, a lightweight soil medium, a drainage layer and an impermeable membrane. Recent studies have confirmed the benefits of green roofs. Green roofs are able to retain water, reduce peak flow, improve biodiversity and mitigate heat island. Although the benefits are evident, the transition from traditional urban drainage systems to the sustain...