Layered System

A lightweight, cost effective built‐up vegetative roof system with Columbia Green growing media, engineered to maximize stormwater retention and plant health. This flexible system can be used with a range of media depths and on any roof layout. The layers can be easily cut on‐site to fit curves and angles.

Components of the System:

Vegetation. Custom matched and most often regionally-sourced to meet each project’s design and installation parameters. Choose from sedum cuttings, plugs, pre-grown sedum tiles (15”x20”) and pre-grown sedum mats (4’x 6’). Select accent plants may also be available.

Quality growing media options meeting FLL guidelines, regionally blended

Water Retention Layer, providing supplemental moisture retention for plants, high porosity for root aeration, and anchorage. Available in .5-inch or 1-inch thickness

Filter Layer, is adhered directly to the drainage layer. Fabricated from 50% recycled polyester, the non-directional weave design prevents gravitational erosion of the growing media.

Drainage Layer, preventsponding and moves excess water efficiently to the nearest drain. Available in .375-inch and .75-inch thickness

Edger, maintains perimeter stability and delineates design and layout features. Available in Aluminium and Stainless steel with a variety of height options

System	Vegetation	Growing Media	Retention Layer	Filtration	Drainage	Edger
Extensive 3″ – 6″	Customizable	FLL blended	1-inch	3 oz.	.40-inch	Aluminum or Stainless Steel
Semi-Intensive 6″ – 12″	Customizable	FLL blended	.5-inch	3 oz.	.75-inch	Aluminum or Stainless Steel
Intensive 12″ or Greater	Customizable	FLL blended	.5-inch (opt.)	3 oz.	1.5-inch	Aluminum or Stainless Steel
Sloped	Suitable for slopes up to 6:12. Available growing media depths: 3.5”, 4.5”, 6.5” or 8.5”