Green Roof Drainage Plates

Compared with green roofs systems using drainage plates or granular drainage this system is the fastest to install and creates the thinnest and lightest green roof assembly.

Green roof drainage plates.

The filter fabric top layer prevents clogging from the growing media and the waffle entanglements sit directly on the root barrier. Since drainage plates are lightweight and easy to install they have become the most popular drainage system for green roofs. The design creates an open and continuous flow path even under high loads. Three thicknesses of drainage plates are available to meet the drainage and water storage requirements of almost any green roof.

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. Grs extenduct is a 40 recycled drainage core in a waffle pattern with a geocomposite fabric bonded to the top side. A separation fabric over the top of the plates retains. Water is retained within pockets on the upper sides of the plates while excess water flows through small holes and spills over the edges to be carried off the roof.

Ct drainage plate systems are green roof systems underdrained with waffled sem rigid plastic sheets called drainage plates. Grs extenduct 2 includes an additional geocomposite fabric bonded to. Green roof systems of this type are drained by a multi layer fabric mat called a drainage mat that combines soil separation drainage and protection functions. A synthetic protection water storage fabric weighing 500g m2 15 oz yd2 is applied over the waterproofing or root barrier membrane.

Drainage plates are recommended for roofs with slopes less than 1 12.