StormCap™ is a superior water retaining pre-vegetated system absorbing 51 l/m2. Best water retention to weight ratio.  Engineered growing media- a proprietary mix of lightweight minerals and organic components – encourages microbial soil health, healthier plants, reduces irrigation and potential need for fertilizers.  The Needled Mineral Hydro Blanket is non-petroleum, formaldehyde-free alternative that holds up to 90% of its volume in water – very effective in capturing and storing rainwater without exerting excessive loading. Most components come in rolls for easy transport and install.
Product Code Product Name Metric Thickness (mm) Dry Wt. (kg/m2) Sat. Wt. (kg/m2) Water ret. (l/m2)
 NL718 Sedum Blanket 20.00 17.20 29.70 12.50
NL600 Growing Medium 25.00 21.65 35.28 13.63
NL501 NM Hydro Blanket 25.80 3.90 28.80 24.90
NL400 Filter Fabric 0.55 0.10 0.40 0.30
NL300 Drainage Mat 17.00 0.34 0.34 0.00
NL120 Root Barrier 0.50 0.46 0.46 0.00
 Total 88.85 43.65 94.98 51.33

StormCapTM is a superior water retaining pre-vegetated system.


Increased Biodiversity with BioBerm™ and Custom Plants

Next Level Stormwater Management’s BioBerm™  offers a seamless integration of extensive and intensive green roof features: pre-grown sedum groundcover and a custom planting option. Varying depths of engineered growing medium create topographic variation and increased biodiversity. Flexible sedum mat drapes over the undulating roofscape helping reduce water evaporation, soil erosion and weed growth. Innovative for providing an enhanced aesthetic in a custom manner, over areas that are highly visible or that do not have strict weight restriction.

Unique Design & Logo Creation

Sloped, rounded, pyramid shaped – Next Level Stormwater Management’s systems easily adapt and conform to various roof designs. The sedum blanket and premium base layers are fully customizable and can be easily cut to fit any shape and design.

Increased Stormwater Retention

Option available for supremely effective stormwater management solutions without exerting excessive loading. The innovation is in efficient water retention layers which hold 60% more rainfall compared to typical growing medium of the same thickness while remaining 20% lighter in weight.


The roof membrane is located on top of the insulation and therefore subject to destructive elements such as ultraviolet degradation, thermal cycling, hailstone impact, and other environmental hazards. The vegetated system is loose-laid on a CRA which helps to protect and extend the lifespan of the roofing membrane.


Insulation is located above the roofing membrane. A root barrier is installed in between the insulation and roofing membrane to promote open diffusion and ensure the top surface of the insulation has a ventilating air space.

PMR XF301 Extreme_together


Next Level Stormwater Management provides a Survivability Report with details about the success of our projects to assist with permit processes, such as the City of Toronto permit application.    For more info or help with other municipalities, please contact us.


Tested to CAN/CSA A123.24

Next Level Stormwater Management was a key participant in developing the Canadian Standard Test Method for Wind Resistance of Modular Vegetated Roof Assembly – the first such test in the world.

Contact us for more info.

Technical Document Downloads

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