Green Roof Filter Layer

The grs ff35 has a high flow rate of 150 gallons per minute per square foot.

Green roof filter layer.

It prevents small soil particles from filling the drainage layer and so the water buffering function. 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. The 6 slotted triangle shape is used beneath the aggredrain layer and allows for water to flow freely. Filter cloth the filter cloth layer a useful extension to the green roof drainage layer can be easily managed on its own as it works primarily to help remove clogs and excess organic material from the drain.

A filter fleece separates the drainage layer from the roof garden substrate in a green roof structure. A green roof system consists of four layers. This is very important as it provides the level of security needed to ensure safety. For a biodiverse green roof the various vegetation options above can be combined to help create different habitats.

Aggredrain is most commonly used at a 1 minimum depth over a moisture retention mat grs mrm 14 or grs mrm 30. A drainage layer a filter layer a growing medium layer substrate and a vegetation layer. Considerations in the selection and use of filter sheets include. Green roof solutions has a 3 5 oz filter fabric ff35.

An important consideration with filter fabric is the flow rate while preventing media runoff. Bauder sdf drainage layer. The drainage layer is highly useful for those roofs in which the maximum angle is not more than 10 degrees. Waterproof membrane drainage layer filter layer substrate as well as the planted portion.

Filter sheet a layer of filter sheet will prevent substrate dropping into the drainage layer. 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. A green roof generally possesses a total of five layers that include. Protection drainage and filtration.

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. Drainage protection filtration layer it is used for lightweight green roofs terraces and has many functions. The green roof solutions drainage conduit is a stainless steel channel for use with the aggredrain system. Successfully managing this composite structure is the key to creating a green roof system that performs well over the long term.

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.