LiteN’Less™ Blue is an innovative, patent-pending product that helps our buildings adapt to climate change.  LiteN’Less™ Blue consists of a lightweight yet highly absorbent “sponge” layer that is thermally bonded to a 3D entangled mesh.

LiteN’Less™ Blue comes in flexible rolls that are easily installed on rooftops and ballasted with aggregates or permeable pavers to create a “blue roof” for stormwater management.

LiteN’Less™ Blue is highly adaptable and can be combined with a vegetated roof for a “blue-green roof”, or under rooftop photovoltics for a “blue-solar roof” or combined with both for “blue-green-solar roof” for maximum benefit and performance.

XF525 is a geo-composite composed of a drainage core of fused three-dimensional entangled polypropylene filaments thermally bonded to a non-woven water retention fleece made of 100% recycled mixed synthetic and natural fibers. It detains and retains runoff to control stormwater at the source.

XF525 enables designers to easily transform any rooftops into stormwater management tools. Its lightweight yet absorbent fleece retains 32 mm (1.3”) of rainfall to meet most municipalities’ stormwater requirements, providing an economical stormwater management option.

XF525 also increases the water storage capacity of any green roofs, thus enhancing their stormwater management capabilities. The retention fleece captures 32 l/m2 (0.79 gal/ft2) of water during rainfall events. This greatly educes site runoff and irrigation needs.

Recommended Applications

  • Blue roofs: low impact rooftop stormwater management tool
  • Green roofs: vegetated roofs, garden roofs, landscaped roofs
  • Suitable for conventional and protected membrane roofs (PMR)















Features and Benefits

  • General
    •  Superior water storage capacity – holds >14 times its own weight in water  Vapor permeable – suitable for conventional and protected membrane roofs (PMR)
    • High compressive strength to maintain good drainage under loads
    • 3D open core provides a high drainage rate with minimal resistance  Lightweight, flexible, easy and quick to install  Roll format allows easy removal and replacement for membrane access
    • 88% post industrial recycled content contributes towards LEED credits
  • Blue Roof
    • No hydrostatic pressure on roof membrane
    • No exposed ponding water on the roof
    • Convert any roof into a stormwater management tool
  • Green Roof
    • Store water for plants to use during hot and drought periods
    • Uniform supply of water that is readily accessible by plants
    • Enhance stormwater management ability of any green roofs
Product Code Product Name Thickness (cm) Dry Wt. (kg/m2) Sat. Wt. (kg/m2) Water ret. (l/m2) Water ret. (inch)
Stone Ballast 1.50 27.79 30.78 2.99 0.12
NL515  Blue 4.80  2.20 34.50  32.30 1.30
NL120  Root Barrier  0.05  0.47  0.47  0.00  0.00
Total  6.35 30.46 65.75 35.29 1.42



Install XF 525 with fleece facing up and entangled mesh down. Butt rolls tightly together to minimize gap and maintain continuity. Stagger adjacent rolls by at least 40 in. (1 m) so end joints are not aligned. Cover XF 525 immediately after installation to prevent wind uplift and degradation by ultra-violet radiation.
Blue Roof: Install additional water retention fleece on top of XF 525 as needed to achieve desired water storage capacity. Cover with filter fabric. Ballasted with aggregates, or place under permeable, porous or pervious pavers to prevent wind uplift.
Green Roof: Install filter fabric or additional water retention fleece as needed on top of XF 525, followed with growing medium, vegetation or pre-vegetated mats.


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

Next Level Stormwater Management’s systems easily adapt and conform to various roofs. The sedum blanket and premium base layers are fully customizable and can be easily cut to fit any shape and design.


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. The roofing ballast above the insulation becomes part of the system and acts like the drainage layer. Contact us for other roofing assemblies.

PMR XF300 Standard_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.


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

Back to Top