Green Roof Root Barrier Thickness

Three thicknesses of drainage plates are available to meet the drainage and water storage requirements of almost any green roof.

Green roof root barrier thickness.

Root barrier made of high density polyethylene for extensive green roofs bitumen and polystyrol resistant without plasticize tear proof uv stabilized. Drainage mats nominal thickness. 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. Of course this is not all that you might have in your roofing.

Grs root barriers come in 20 mil 30 mil and 40 mil thickness depending on the application. 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. The root barrier membrane is suitable as a separation layer for use in single ply green roofs intensive roofs and under domestic driveways. Safeguard root barrier is intended to provide root protection in green roof applications where the primary waterproofing layer does not offer adequate root protection.

Optional item if non root resistant waterproofing used. A separation layer sometimes known as a slip layer allows the waterproofing layer and overall structure to move independently of the green roof. These may not be required if the waterproof membrane is certified as root resistant. 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.

Additional green roof layers. Grs root barriers do not contain plasticizers which can migrate to the surface and react with roofing membranes. 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. Thicker welded root barriers will be needed for green roofs involving trees bamboo or other vigorous spreading grasses.

The most common root barriers used are thin polyethylene sheets laid over the waterproofing membrane. Then i looked at conflicting information on the suitability of epdm for green roof applications and determined that 1 firestone rubbergard 60 mil.