Division C - Accepted Materials
Group - Vegetated Roof Systems
Hydrotech Semi-intensive Garden Roof® Assembly
by Hydrotech Membrane Corporation
| 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 material 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
- Hydrotech Membrane Corporation
- 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
- The Semi-Intensive Garden Roof® Assembly is considered a lightweight assembly, but with a slightly deeper soil depth, and is designed to support sod lawns as well as perennials. Lawns have unique needs due to the foot traffic they experience. Designers have the ability to create large lawn areas on rooftops using a Garden Roof Semi-Intensive® Assembly.
- Manufacturer online resources
- Semi-intensive Garden Roof Assembly
- System Type
- Semi-Intensive
- System Depth
- 203.2 mm (8") to 355.6 mm (14")
- Growing Media Depth
- 152.4 mm (6") to 304.8 mm (12")
- Vegetation Profile
- as specified by the Design Authority/Green Roof Design Professional (See Conditions and Limitations below)
- Suitable climate zones
- conditional on the specified vegetation profile (refer to the Design Authority/Green Roof Design Professional)
- System Components*
- In the usual order, from top to bottom; click on link for Technical Data Sheet (TDS)
- †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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