Green Roof Systems Weight

The weight of a green roof is one of a number of factors specifiers need to consider when deciding which roofing system to use.

Green roof systems weight.

Medium trees up to 10 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. Here s a guide comparing types grant findley october 2 2014 at 3 14 pm reply. Shrubs up to 3 m.

In addition the weight also depends on the water buffering capacity of the drainage layer. 5 25 media depth 17 22 lbs ft2 29 34 lbs ft2. Plugs or cuttings for plant material weight. System depth dry weight saturated weight.

Large trees up to 15 m. Add 2 5 lbs ft2 for sedum mats and tiles. Perennials and low shrubs up to 1 5 m. Sometimes a flat roof support structure requires a lightweight green roof.

Green roof vegetation type. 7 media depth 22 29 lbs ft2 38 46 lbs ft2. 6 media depth 19 25 lbs ft2 33 39 lbs ft2. Weight loading kg m 2 low herbaceous succulents and grasses 10 2.

Small trees up to 6 m. So in dry state 50 m2 traditional green roof weighs around 5 tons while a similar sized urbanscape roof weighs just 1 ton.