Functional Green Roofs

(Extensive and Ultra-Extensive)

Maximize Incentives, Minimize Maintenance — Green Roofs That Pay Off

Smart, lightweight green roofs that deliver environmental value with minimal upkeep.

Functional green roofs offer a smart, cost-effective solution for buildings seeking performance-driven sustainability. Designed for low maintenance and tailored to meet regulatory, incentive, or environmental goals, these systems deliver maximum value with minimal upkeep. Whether you’re aiming to manage stormwater, earn LEED® credits, or enhance energy efficiency, functional green roofs provide a reliable and attractive path forward.

Functional green roofs are available in two configurations—ultra-extensive and extensive—primarily distinguished by their maintenance requirements: ultra-extensive systems require virtually no maintenance and use hardy, self-sustaining plant species, while extensive systems involve minimal upkeep. These options are ideal for non-visible rooftops where regular maintenance access is limited

Design Elements

  • Designed for low maintenance and affordability.
  • Thrive in most climates with minimal care (occasional weeding, annual fertilizing, and extra watering during dry spells).
  • Tailored to meet specific performance goals using  2.75 inch or 4 inch modules.
  • Lowest costs per square foot for materials, installation, and maintenance.
  • Require minimal structural capacity (approximately 30lbs/sf for 4 inch modules; 15lbs/sf for 2.75 inch modules).
  • Use a proven palette of drought-tolerant succulents.
  • Lightweight, pre-grown, and easy to install and maintain assemblies.
  • Often cover large roof areas.

Performance Outcomes

  • Deliver maximum benefits at low costs.
  • Meet performance, regulatory, or incentive requirements.
  • Enhance building’s appearance, energy efficiency, and environmental impact.
  • Support on-site stormwater management.
  • Help meet code or local ordinance requirements for green roof coverage.
  • Enable eligibility for incentive programs and tax credits.
  • Contribute to local sustainability requirements.
  • Support LEED® credit compliance.
  • Extend the lifespan of the roof.

 

Extensive and Ultra-Extensive Product Details
Shallow Depth Modules – 4 in and 2.75 in
Module Size 2 ft x 2 ft x 4 in, 2 ft x 2 ft x 2.75 in.
Weight Approximately 26 to 30 lb/sf for 4 in and 12 to 18 lb/sf for 2.75 in fully vegetated at maximum water-holding capacity.
Uses Intended for Functional and/or designed vegetative green roof applications. Excellent tool for managing stormwater and integrating into new or existing buildings.
Plants Succulent ground covers and water-conserving accent plants.
Functional Green Roofs provide the owner with the highest benefit-to-cost ratio, with minimal structural impact and low maintenance requirements.

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