Green Roof Slab Thickness

For roof gardens an extra load of 400 750 kg m2on the structure of the building must be accounted for compared to the 60 250 kg m2 of the extensive green roof.

Green roof slab thickness.

Roofs with the thinnest vegetation blankets weigh around 45 to 60 kg m2 while thicker ones can be 160 to 250 kg m2 when wet. Flat roofing solutions bauder flat roofs. The nominal thickness of a green roof is the approximate total height of the soil and drainage components that constitute the green roof system excluding the roof structure insulation waterproofing and plants. The entire thickness of the layer is usually between than 6 to 15 cm.

Intensive to describe green roofs that are thick enough. Intensive green roofs have a higher weight and require a minimum soil thickness of at least 30 cm compared to the 5 12 cm of the latter. It is common practice to use the term extensive to describe green roofs that are very thin and will only support hardy drought resistant vegetation such as sedums herbs and perennials. Extensive green roofs are principally created for their ecological advantages.

They provide shade to the top of a building evapotranspiration. The plants in a green roof absorb water through their roots and then use surrounding heat from the air to evaporate the water while some roofs can reach temperatures of up to 90 f in the summertime these two features can allow.