Sedum Roof Weight

Typically the total depth of the green roof would be 85 100mm 12 20mm drainage layer 70mm of substrate and have a saturated weight of approx.

Sedum roof weight.

Sedum roofs with a natural drainage layer are designed to maximize water retention while sedum roofs with a synthetic drainage layer may focus more on minimizing weight. These provide aesthetic interest and diversity. A standard sedum roof has a saturated weight of about 80 kg m. So in dry state 50 m2 traditional green roof weighs around 5 tons while a similar sized urbanscape roof weighs just 1 ton.

If necessary this weight can be reduced to approximately 40 kg m for roofs that can only bear a lightweight green roof system. When using a biodiverse vegetation such as a mix of sedums grasses herbs plants and nectar plants the weight of the green roof is about 150 kilos m2 because a thicker substrate layer is required. When sedum vegetation is applied to a green roof the weight is approximately 30 kg m2. Roughly speaking extensive green roofs have a substrate thickness of between 4 and 15 cm and a weight of 30 to 220 kilo per m2.

Low weight can be crucial for huge building structures and retrofit projects with limited roof loads. In addition the weight also depends on the water buffering capacity of the drainage layer. Weight of standard sedum roof. The weight of a green roof is one of a number of factors specifiers need to consider when deciding which roofing system to use.

A variety of hardy sedums both native and non native. The thicker the substrate layer the greater the weight of the total roof structure. If necessary this weight can be reduced to approximately 40 kg m for roofs that can only bear a lightweight green roof system. When sedum vegetation is applied to a green roof the weight is approximately 30 kg m2.

Extensive built up. Here s a guide comparing types. Plugs or cuttings for plant material weight. A standard sedum roof has a saturated weight of about 80 kg m.

Scale this up and a 1 000 m2 traditional green roof space requires 100 tons of material to be brought on the roof and the urbanscape version only 20 tons and can be called a light weight green roof. The thicker the substrate layer the greater the weight of the total roof structure. Individual complete modules are installed quickly and have a 90 fully grown sedum layer for instant greening. You can watch a video about liveroof here.