Sedum Green Roof Weight

You can expect the loading to be upwards of 250kg per square metre which is quite a lot especially if your building is an average garden shed.

Sedum green roof weight.

Layered system semi intensive growing media. 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. Based on sustainable green technology and stormwater runoff management our green roofs provide many advantages and innovations in green roof installation. Plant material weight plugs or small containers system depth dry weight saturated weight.

Xf301 sedum blanket extensive green roof system when to specify. 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. 6 media depth 24 29 lbs ft2 39 46 lbs ft2. As such you may want to consider strengthening the walls of your structure and the roof deck before installing the green roof.

Weight of standard sedum roof. When sedum vegetation is applied to a green roof the weight is approximately 30 kg m2. The thicker the substrate layer the greater the weight of the total roof structure. 5 media depth 17 22lbs ft2 31 37 lbs ft2.

An interesting example of an intensive green roof is manaton the award winning private house on dartmoor that uses local meadow grass to blend the family home into the landscape. It comprises mature sedum on 20mm of extensive substrate and incorporating a multifunctional water retention and filter layer. In addition the weight also depends on the water buffering capacity of the drainage layer. Lightweight low maintenance extensive green roofs.

If necessary this weight can be reduced to approximately 40 kg m for roofs that can only bear a lightweight green roof system. A standard sedum roof has a saturated weight of about 80 kg m. This is the lightest weight all in one system available. 75 drainage layer 5 water retention layer includes 2 lbs s f.

So in dry state 50 m2 traditional green roof weighs around 5 tons while a similar sized urbanscape roof weighs just 1 ton. Key features extensive sedum green roofs utilise drought tolerant plant species which are typically sedum species. 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. Extensive green roofs are constructed using shallow depths of growing mediums known as substrates and vegetated with low maintenance plants.