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.

Green roof slab thickness.

There are two types of green roof. Extensive green roofs are principally created for their ecological advantages. 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. 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.

Flat roofing solutions bauder flat roofs. Intensive roofs which are thicker with a minimum depth of 12 8 cm 5 1 16 in and can support a wider variety of plants but are heavier and require more maintenance and extensive roofs which are shallow ranging in depth from 2 cm 13 16 in to 12 7 cm 5 in lighter than intensive green roofs and require minimal maintenance. 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. 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.

Green roofs reduce the temperature of the building and the surrounding air in multiple ways. The entire thickness of the layer is usually between than 6 to 15 cm.