GreenTech ITM™

Built-in drainage channels allow water to flow through the soil into the open channels and directly to roof drain outlets. At the same time, each high-density polyethylene module protects the roof surface from root infiltration and damage to the roof membrane. The result is a robust planting surface, with sufficient root depth, that is more lightweight and flexible than other green roof options.

Advantages of a Modular System versus a Fixed Green Roof Design:

Simple Maintenance and Repair

Modular - Modules can easily be moved and then put back in place without disturbing growing media or plantings

Fixed Roof - System must be dismantled and rebuilt when repair location found; plants and layers damaged

Interlocking System

Modular - GreenTech's patented interlocking system to insure proper locking, alignment and placement during installation and integration

Fixed Roof - Customized per project; many sources, limited speed

More Economical Cost

Modular - Economical installed costs because plants and soils are sourced and installed locally versus more costly pre-planted modular and built-in-place systems

Fixed Roof - Often more costly

Fast Installation

Modular - Can be delivered empty or pre-planted, ready to set in place. Downtime due to inclement weather reduced Fixed Roof - Multi-layer, built-in-place, vegetation planted at job site is time-consuming

Soils and Plants Sourced Locally

Modular - GreenTech Modules are shipped to the appropriate location and filled with appropriate local soils and plants to meet a specific design. No proprietary soils are required.

Fixed Roof - Roofs generally require about 2 years to be "green"

Lightweight

Modular - installs on any existing roof surface in good condition and with structural capacity

Fixed Roof - Systems often heavy and roof surface replacement often necessary

Easy Placement

Modular - All modular system components quickly put in place on roof in accordance with design

Fixed Roof - Components delivered by multiple sources can present scheduling risk

LEED® Certification

Modular - GreenTech modules contain 100% recycled materials contributing to LEED® recycling credits

Fixed Roof - Most often do not have components containing recycled materials

Stormwater Retention

Modular - Module design allows for custom soil profiles to manage water flow and water retention.

Fixed Roof - Water retention layers must be added

Easy Alterations & Additions

Modular - Option of installing green roof in sections offers opportunity for future add-ons and alterations

Fixed Roof - Often difficult and expensive to modify

Warranty

•Modular - GreenTech modules are guaranteed for 15 years

Fixed Roof - Limited Warranty - Removal and re-installation of plants/vegetation generally most often not included

For more details, download our Green Roofs/Roof Gardens fact sheet.

"I can assure you that I was very impressed with the GreenTech® modular system and I can see many opportunities to use that system to create roof-top gardens on flat roofs. One of the big problems with most roof top gardens is that there is insufficient slope to drain water through gravel resulting in numerous drainage problems. The GreenTech® system does not restrict the movement of water and it allows for sufficient root depth".

Francis R. Gouin
Professor Emeritus
University of Maryland