Green Roof Drainage Plates

Grs extenduct is a 40 recycled drainage core in a waffle pattern with a geocomposite fabric bonded to the top side.

Green roof drainage plates.

Ct drainage plate systems are green roof systems underdrained with waffled sem rigid plastic sheets called drainage plates. This kind of board integrates the functions of storage and drainage of water drainage board drainage cells drainage plates for rooftop garden greening roofs. A synthetic protection water storage fabric weighing 500g m2 15 oz yd2 is applied over the waterproofing or root barrier membrane. Three thicknesses of drainage plates are available to meet the drainage and water storage requirements of almost any green roof.

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. The design creates an open and continuous flow path even under high loads. Drainage plates are recommended for roofs with slopes less than 1 12. 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 2 includes an additional geocomposite fabric bonded to. 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. Drainage board is an important part of roof greening system and plays a role in storing and draining water.

Since drainage plates are lightweight and easy to install they have become the most popular drainage system for green roofs.