Gey 2 Green

Products - Drainage

  • Nophadrain ND5+1

    The ND5+1 is a composite system that features an initial protective layer to the roof surface, a rigid, formed, cuspated drainage and reservoir layer and a fleece top layer. The benefits of this system are that each 40m² roll is very easy and fast to install and you have all 3 essential layers installed in one hit, saving time and money over separately purchased and installed materials. ND5+1 is strong, robust, resists compression and retains its drainage and reservoir performance.

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  • Nophadrain ND4+1

    The ND4+1 is as a above with less drainage reservoir.

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  • Biodrain

    Ridged Biodrain, is a 100% recycled foam, water retention, protection and drainage layer. Allowing for a lightweight and speedy installation. Heat bonded upstands preventing down slope substrate slip on roofs with a pitch of up to 100.

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  • Ridged Biodrain

    Ridged Biodrain, is a 100% recycled foam, water retention, protection and drainage layer. Allowing for a lightweight and speedy installation. Heat bonded upstands preventing down slope substrate slip on roofs with a pitch of up to 100.

    Download PDF specification


  • Diadrain

    The DiaDrain 25 water drainage and reservoir boards are made of heavy duty polystyrene with excellent load-bearing capacity. The cuspate surface is shaped on both sides. This layer is perfuated to ensure continuous aeration, water retention and water drainage in a green roof build up. Diadem 150 is the DiaDrain 25 product including filter and drainage layers.

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