Division C - Accepted Materials
Group - Vegetated Roof Systems
NLSM StormCap Detain 3°
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™ Detain 3° is designed to manage stormwater on the roof by providing retention and detention, making it a full-fledged stormwater tool ready to face second day and extra-large storms. StormCap™ Detain 3° reduces or eliminates the need for cisterns and bioretention facilities and frees up valuable space for income-generating development. It is also designed to work on sloped roofs (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 Detain 3° System
- System Type
- Extensive
- System Depth
- 114 mm (4-1/2") to 352 mm (13-7/8")
- 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
- NL201 Non-Perforated Edging
- NL211 Drainbox
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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.
- Note that perforated edge metal is required in the "RGC Standard for Vegetated Roofs"; therefore, when a system specifies materials that do not conform to the Standard, the Design Authority must request a written Variance from the Guarantor.
- In addition, 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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