Division C - Accepted Materials
Group - Vegetated Roof Systems
NLSM StormCap
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
- StormCap™ is designed by Next Level Stormwater Management as a superior water retaining pre-vegetated system absorbing 67 l/m2, a high water retention-to-weight ratio. Engineered growing media is a proprietary mix of lightweight minerals and organic components that encourages microbial soil health, healthier plants, reduces irrigation, and reduces the potential need for fertilizers. The Needled Mineral Hydro Blanket is a non-petroleum based, formaldehyde-free product that holds up to 90% of its volume in water, making it very effective in capturing and storing rainwater without exerting excessive loading. Most components come in rolls for easy transport and install (adapted from the manufacturer's literature. See the link at right to the manufacturer's online resources page for more information).
- Manufacturer Online Resource
- StormCap System
- System Type
- Extensive
- System Depth
- 114 mm (4-1/2") to 264 mm (10-3/8")
- Growing Media Depth
- 70 mm (2-3/4") to 170 mm (6-11/16")
- Vegetation Profile
- Moss-Sedum
- Suitable climate zones
- All BC zones, subject to manufacturer's approval
- System Components*
- In the usual order, from top to bottom; click on link for Technical Data Sheet (TDS)
- Conventionally Insulated Roof Assembly by roofing Contractor
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- †Guarantor's Notes
- Systems labeled "Inverted" are designed for a protected membrane roof assembly, also known as an inverted roof assembly.
- While Semi-intensive and Intensive vegetated roof systems are limited to only protected membrane roofs (See the Sentence 1.1.3.2.(5) in the "RGC Standard for Vegetated Roofs"), some vegetated roof system manufacturers offer their systems for conventionally insulated roofs. To request a written Variance to the published limitation, follow the requirements in Article 1.1.3.6..
- *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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