Green Roof Drainage Plates

Ct drainage plate systems are green roof systems underdrained with waffled sem rigid plastic sheets called drainage plates.

Green roof drainage plates.

Since drainage plates are lightweight and easy to install they have become the most popular drainage system for green roofs. 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 plates are recommended for roofs with slopes less than 1 12. 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.

Grs extenduct 2 includes an additional geocomposite fabric bonded to. 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. Grs extenduct is a 40 recycled drainage core in a waffle pattern with a geocomposite fabric bonded to the top side. The filter fabric top layer prevents clogging from the growing media and the waffle entanglements sit directly on the root barrier.

Systems with drainage mats. The design creates an open and continuous flow path even under high loads. A synthetic protection water storage fabric weighing 500g m2 15 oz yd2 is applied over the waterproofing or root barrier membrane. This kind of board integrates the functions of storage and drainage of water drainage board drainage cells drainage plates for rooftop garden greening roofs.

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.