Extensive and Ultra-Extensive

Extensive and ultra-extensive 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, minimal capital cost, and fastest installations. Whether you’re aiming to manage stormwater, earn LEED® credits, or enhance energy efficiency, extensive green roofs are the workhorse of the industry, highly functional ,and provide a reliable and attractive path forward.

Our shallowest green roofs are available in two configurations—ultra-extensive and extensive—primarily distinguished by their weight (depth), and to some extent their maintenance requirements: ultra-extensive systems are only 10-15lbs/sf, allowing for maximum compatibility with new and existing buildings, and use hardy, self-sustaining plant species.  The ultra shallow soil profile, however, may require more frequent watering or consideration for permanent irrigation depending location.  Extensive systems are heavier, 26-30lbs/sf, and are the standard depth and weight for most functional and incentive or regulatory compliant installations.  In most climates, irrigation is not required and maintenance is minimal.  Both options are ideal for both visible and non-visible rooftops where performance and value are the most important criteria.

Design Elements

• Standard 2’x2’x4” or 2.75” modules, compatible with all other depths in mixed-depth applications
• Compatible with standard accessories (LINK) including hardscape, edging, mineral wool stormwater storage layers, and tray inserts to create internal void space for stormwater storage
• 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.
• Contributes to energy conservation through active cooling during summer months and thermal mass during winter months
• 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.
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