Green Roof Root Barrier Thickness

A separation layer sometimes known as a slip layer allows the waterproofing layer and overall structure to move independently of the green roof.

Green roof root barrier thickness.

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. Grs root barriers come in 20 mil 30 mil and 40 mil thickness depending on the application. 25mm 1 thickness is standard for thin extensive roofs 40mm 1 5 is recommended for enhanced water storage and drainage on thicker extensive roofs and semi intensive roofs and 60mm 2 5 is available for maximum water retention on intensive roofs.

Root barrier the root barrier is the system that avoids the membrane underneath from being pierced and penetrated by roots ensuring that the system can remain in top shape for as long as it possibly can without needing any adjustments or changes. Root barrier made of high density polyethylene for extensive green roofs bitumen and polystyrol resistant without plasticize tear proof uv stabilized. Safeguard root barrier is intended to provide root protection in green roof applications where the primary waterproofing layer does not offer adequate root protection. 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.

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. Then i looked at conflicting information on the suitability of epdm for green roof applications and determined that 1 firestone rubbergard 60 mil. Optional item if non root resistant waterproofing used. Rb20 is the most common root barrier product used for extensive green roof systems.

Three thicknesses of drainage plates are available to meet the drainage and water storage requirements of almost any green roof. The root barrier membrane is suitable as a separation layer for use in single ply green roofs intensive roofs and under domestic driveways. The most common root barriers used are thin polyethylene sheets laid over the waterproofing membrane. Grs root barriers do not contain plasticizers which can migrate to the surface and react with roofing membranes.

Drainage mats nominal thickness. Additional green roof layers.