Green Roof Filter Layer

A drainage layer a filter layer a growing medium layer substrate and a vegetation layer.

Green roof filter layer.

Successfully managing this composite structure is the key to creating a green roof system that performs well over the long term. The basic anatomy of a green roof consists of vegetation growing medium filter membrane drainage layer waterproof root repellant layer roofing membrane support for plantings above thermal insulation vapor control layer and structural roof support. Considerations in the selection and use of filter sheets include. This is very important as it provides the level of security needed to ensure safety.

Filter layer this layer is a polypropylene geotextile fleece that prevents substrate fines and sediment from being washed in to the water storage or drainage component. It prevents small soil particles from filling the drainage layer and so the water buffering function. Bauder sdf drainage layer. The 6 slotted triangle shape is used beneath the aggredrain layer and allows for water to flow freely.

A green roof generally possesses a total of five layers that include. Of the drainage layer remains intact for longer. Aggredrain is most commonly used at a 1 minimum depth over a moisture retention mat grs mrm 14 or grs mrm 30. Protection drainage and filtration.

The grs ff35 has a high flow rate of 150 gallons per minute per square foot. Beneath the growing media and above the drainage system the filter fabric keeps the media from clogging up the drainage while allowing water to flow freely. It is made of a filtration veil and the polyamide monofilament fibre network layer. A filter fabric layer on top should separate the aggredrain from the growing media.

Enough filter sheet is set down over the roof so that at the vertical edges of the planting beds the sheet will be the same height as the substrate. The green roof solutions drainage conduit is a stainless steel channel for use with the aggredrain system. Waterproof membrane drainage layer filter layer substrate as well as the planted portion. Green roof solutions has a 3 5 oz filter fabric ff35.

A filter fleece separates the drainage layer from the roof garden substrate in a green roof structure. Drainage protection filtration layer it is used for lightweight green roofs terraces and has many functions. A green roof system consists of four layers. An important consideration with filter fabric is the flow rate while preventing media runoff.

The drainage layer is highly useful for those roofs in which the maximum angle is not more than 10 degrees.