Viherkatot

Viherkatot, often translated as green roofs, are building structures that are partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane. They can be designed as either extensive or intensive systems. Extensive green roofs are shallow, lightweight, and require minimal maintenance, typically planted with sedums and other hardy, low-growing plants. Intensive green roofs are deeper and heavier, allowing for a wider variety of plants, including shrubs and trees, and can be used as accessible spaces like gardens or parks.

The primary benefits of viherkatot include improved stormwater management by absorbing rainwater, reduced urban heat island effect through cooling evapotranspiration, and enhanced building insulation, leading to lower energy costs. They also contribute to biodiversity by providing habitats for insects and birds, and can improve air quality by filtering pollutants. Furthermore, viherkatot can extend the lifespan of the underlying roof membrane by protecting it from UV radiation and extreme temperature fluctuations.

The implementation of viherkatot involves careful planning and construction. Key components include a waterproof membrane, a root barrier to prevent plant roots from damaging the structure, a drainage layer to manage excess water, a growing medium, and the vegetation itself. The structural capacity of the building must be assessed to support the added weight of the green roof system. Viherkatot are increasingly recognized for their environmental and economic advantages in urban development and sustainable building practices.