: Includes two filter layers (root-resistant and membrane-protective) and is made from 100% recycled filter fabric. Enkadrain 3811R Green Roof Drainage Layer
: ~$489 at BlueStone Supply or ~$422 at Best Materials . green roof drainage layer buy
: A high-retention system specifically designed for green roofs. It features an inverted dimpled core that retains approximately 1.1 gallons of water per 10 square feet. It features an inverted dimpled core that retains
: Applications requiring continuous discharge under heavy compressive loads, such as rooftop gardens or permeable paver bases. J-Drain GRS50 responsible for facilitating water runoff
The drainage layer is a critical component of a green roof system, responsible for facilitating water runoff, providing aeration to plant roots, and protecting the waterproofing membrane. A high-quality drainage layer prevents soil oversaturation, which can otherwise increase the structural load on the roof and compromise its integrity.
: A more cost-effective and lighter alternative to the standard GRS, designed for projects with lower water retention requirements (~0.042 gal/sq. ft.). : ~$380 at BlueStone Supply . Types of Drainage Layers