Green Roof Root Barrier Thickness

Optional item if non root resistant waterproofing used.

Green roof root barrier thickness. Then i looked at conflicting information on the suitability of epdm for green roof applications and determined that 1 firestone rubbergard 60 mil. Grs root barriers come in 20 mil 30 mil and 40 mil thickness depending on the application. The nominal thickness of a green roof is the approximate total height of the soil and drainage components that constitute the green roof system excluding the roof structure insulation waterproofing and plants. This mix is made up to ensure that materials can blend together effectively.

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. Extensive green roofs are generally made up of a very thin layer of soil or other planting medium with shallow root plants like sedum mosses and grasses. The soil is usually not more than 5 deep and is sometimes contained by a tray system which provides a barrier to excessive growth protects the roof membrane and also interlocks the entire system together to prevent wind damage. Safeguard root barrier is simply loose laid on top of the primary waterproofing layer before subsequent green roof layers drainage layer filtration layer etc are laid on top.

These may not be required if the waterproof membrane is certified as root resistant. Drainage mats nominal thickness. It is ideal for systems that have typical green roof plants such as sedums which have shallow roots and will not present a lot of penetration pressure. Three thicknesses of drainage plates are available to meet the drainage and water storage requirements of almost any green roof.

Safeguard root barrier is intended to provide root protection in green roof applications where the primary waterproofing layer does not offer adequate root protection. Epdm is fll certified for green roofs and 2 if we ensured that seams were properly sealed and we installed a root barrier an epdm roof is likely to perform well. Root barrier made of high density polyethylene for extensive green roofs bitumen and polystyrol resistant without plasticize tear proof uv stabilized. Rb20 is the most common root barrier product used for extensive green roof systems.

Grs root barriers do not contain plasticizers which can migrate to the surface and react with roofing membranes. The most common root barriers used are thin polyethylene sheets laid over the waterproofing membrane. Thicker welded root barriers will be needed for green roofs involving trees bamboo or other vigorous spreading grasses.