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Grass-roof
Grass roofs consist of pre-grown low-maintenance grass layers, typically fine fescue blends like Eco-Grass, installed as loose-laid rolled blankets over engineered growing media on flat or low-slope roofs. These systems provide vegetation cover that enhances insulation, stormwater retention, and biodiversity while integrating with building envelopes in cultural and museum projects.
Used on roofs of cultural buildings and museums alongside concrete and glass, grass roofs add thermal mass to moderate heat flow, retain water up to 104 L/m², and support lightweight assemblies starting at 236 kg/m². They enable green roof designs that cool in summer and insulate in winter without heavy structural demands.
Growing media and sod contribute upfront embodied carbon from production and transport; however, long-term carbon sequestration via plant growth and reduced building energy use can offset this. High water retention improves efficiency but requires balancing media depth against added weight and initial footprint.
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