Division C - Accepted Materials
Group - Vegetated Roof Systems
NLSM TerraEXT
by Next Level Stormwater Management
| System/Material Acceptance and Product Details
The information published in the RCABC Roofing Practices Manual and offered below does NOT represent a complete set of the manufacturer’s data or specifications, nor is this system and its various materials recommended or endorsed by the Guarantor. The preparation of a detailed specification is the responsibility of the Design Authority.
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- Vegetated Roof System Manufacturer
- https://www.nlsm.ca/
- Accepted for the RoofStar Guarantee Program
- October 25, 2024
- Accepted for application in
- Vegetated Roof Systems
- Acceptance Criteria
- Refer to the RGC Standard for Vegetated Roofs
- System Summary
- Next Level Stormwater Management's TerraExt is a traditional, pre-grown system that uses a low maintenance sedum planting rolled on top of a proprietary blend of extensive engineered growing medium for a total of 100 mm. Plants are grown on a “blanket” and harvested like sod. TerraExt provides excellent instant green with 85% foliar coverage upon installation. This system is designed to help reduce water evaporation, soil erosion and weed growth. The growing medium is contained by a filter fabric laid above the rest of the system’s under layers. Most components come in rolls that are easy to transport and install (adapted from the manufacturer's literature).
- Manufacturer Online Resource
- TerraEXT System
- System Depth
- 113.0 mm (4-13/16") to 188 mm (7-13/16")
- Growing Media Depth
- 95.0 mm (3-3/4") to 170 mm (6-11/16")
- Vegetation Profile
- Moss-Sedum
- Suitable climate zones
- All BC zones, subject to manufacturer's approval
- System Components
- NL718 Sedum Blanket (Click here for the Technical Data Sheet PDF)
- NL600 Growing Medium (Click here for the Technical Data Sheet PDF)
- NL400 Filter Fabric (Click here for the Technical Data Sheet PDF)
- NL300 Drainage Mat (Click here for the Technical Data Sheet PDF)
- NL120 Root Barrier (Click here for the Technical Data Sheet PDF)
- NL200 Edging & Accessories (Click here for the Technical Data Sheet PDF)
- NL210 Drain Box & Accessories
- NL220 Penetration Box
- *Conditions and Limitations
- Note that system thickness is dependent upon the selection of components, which is determined (in part) by design parameters, including hydrological requirements. Consult with the vegetated roof system manufacturer for options and saturated system weight.
- Also note that vegetation coverage under the RoofStar Vegetated Roof Guarantee applies only to extensive systems planted with mats or trays - see Part 3 of Division A for more about coverage.
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