Green Roof Root Barrier Thickness

Additional green roof layers.

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. 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. A separation layer sometimes known as a slip layer allows the waterproofing layer and overall structure to move independently of the green roof. 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. Grs root barriers come in 20 mil 30 mil and 40 mil thickness depending on the application. Grs root barriers do not contain plasticizers which can migrate to the surface and react with roofing membranes. In this post i will analyze the root barrier products available and identify the most suitable options for the show house.

Of course this is not all that you might have in your roofing. 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. Rb20 is the most common root barrier product used for extensive green roof systems. These may not be required if the waterproof membrane is certified as root resistant.