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JDR Enterprises, Inc. goal is to manufacture, supply, and promote the most efficient, high quality green roofing drain components and technology to our community. |
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J-DRain can be used on all your greenroof applications: |
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Commercial & Residential |
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Intensive & Extensive Greenroofs |
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Flat & Sloped Roofs |
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Planted & Hardscaped Areas | |
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Why is drainage important? |
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Creates drainage at base of greenroof |
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Ensures aeration of growing media |
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Effective water shedding off roof |
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No standing water at plant layer |
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No ponding at membrane layer | |
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Green Roof Cross Section: |
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When choosing the right drain component, a number of our products can easily be incorporated into your greenroof. |
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J-DRain GRS & 400 RB is our most popular drain products under planted areas on greenroofs. They are pre-assembled drain cores with root resistant filter fabric attached to top layer. The root resistant filter fabric prevents fine particles from being washed out and prevents roots from becoming saturated and affecting the efficiency of the drain layer. |
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Applications: |
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Under Vegetated Areas |
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Non-Irrigated Roofs |
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Flat Roofs |
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Shallower Substrates |
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Water Retention | |
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Advantages: |
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Pre-assembled drain system, easy install |
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100% Polystyrene post-industrial regrind |
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Water retention cups (retains 1.1 GAL/10 Sq.ft.) |
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Low cost |
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Prevents most root penetration into drain layer |
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Reduces weight of total greenroof |
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Filters fine particles |
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Ensures drainage efficiency | |
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Applications: |
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Sloped Roofs |
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Irrigated Roofs |
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Deeper Soil Substrates | |
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Advantages: |
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Pre-assembled drain system, easy install |
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Polypropylene drain core |
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Low cost |
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Prevents most root penetration into drain layer |
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Reduces weight of total greenroof |
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Filters fine particles |
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Ensures drainage efficiency | |
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We manufacture and supply many drain options for hardscaped areas of your rooftop garden/plaza deck. J-DRain 302 is our most popular drain product and is a pre-assembled geonet with attached filter fabric. |
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Applications: |
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Under Slab or Poured Concrete |
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Parking Decks |
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Vehicular Traffic |
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Between Roof Membrane & Insulation Board | |
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Advantages: |
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Extremely high compressive strength |
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Flexible |
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Excellent flow rate performance |
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Perfect for heavy duty vehicular traffic |
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Provides two sided drainage | |
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Powder Coated Aluminum Casting with removable, ventilated top and flanged base. |
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Provides easy access and cover for inspection of floor drains in a Greenroof application |
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> Elongation: 200%
> Dielectric: 9000 Volts
> Thickness: 8 mil
> Tensile Strength: 20#/sq. inch
> Underground waterproof seam tape
> Makes watertight junctions & connections
> Provides super stretchability | |
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> Triple-spun polymer root resistant fabric
> 4.5’ x 50’/roll
Depending on plant choices and root behavior, this root resistant fabric will prohibit most, but not all, root growth from typical greenroof plants. | |
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A successful greenroof design relies on a complete understanding of the system mechanics and the relationship between the various integrated components: |
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J-DRain products are compatible with all waterproofing systems on the market today |
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For optimum performance, we recommend engineered soils with minimum silt or organics that could clog the filter fabric |
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Before the construction begins, it is imperative a licensed structural engineer or architect conduct a structural analysis to determine weight load considerations |
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Depending on plant choices and root behavior, this root resistant fabric will prohibit most, but not all root growth from typical greenroof plants |
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This root resistant fabric is not to act as substitute for the root barrier that is required at the waterproofing membrane layer. Please consult your waterproofing company for this criterion |
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Direct UV/sunlight can damage J-DRain products and can cause deterioration. To alleviate UV/sunlight damage, the engineered soil should be installed to cover J-DRain products within 10-14 days | |
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> J-DRain Greenroof Brochure
> J-DRain Greenroof Specifications
> J-DRain Greenroof Booklet
> J-DRain Greenroof Access Box
> Green Roof GRS Installation Instructions |
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