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  • The innovative GRAD system enables decking boards to be laid on a durable aluminium substructure
    in a highly efficient way. The patented Clip-JuAn® fastening clips ensure the decking boards, such as
    Kebony® shown here, can be easily mounted without any visible screw fittings Photo: ©GRAD
  • Used in conjunction with dimensionally stable wood, such as thermopine shown here,
    the Clip-JuAn® fastening system creates high-quality durable decking with joint spacings which remain
    permanently in position. Photo: ©GRAD

The GRAD System: A New Generation of Decking

Deck fastening system with Clip-JuAn® screw fittings on the underside

  • The first hidden fastening system for wooden decking
  • The predefined substructure ensures consistently even grid and joint spacings
  • Alignment errors are completely eliminated
  • Quick and easy to install
  • The multi-award winning Clip-JuAn® system was invented in 2006
  • The clip grooves on the undersides of the boards function as »relief grooves« and reduce the lout  on the wood
  • Complies with the requirements set out in the DTU 51-4 building standard (French standard for the construction of wooden decking)
  • Approved by the FCBA (independent testing institute in France)

GRAD with wooden decking boards

  • Exclusively byWeltholz with Kebony® and thermopine (Lunawood)

Hidden Installation System

  • Hidden fastening system – lateral fixings and screws are completely hidden

Cambered Surface Finish

  • Prevents the decking boards from becoming waterlogged
  • Provides optimum drainage across the decking boards
  • Prevents unwanted cupping

Individual Decking Boards Can Be Detached

  • Very easy to install and replace individual boards
  • It is possible to detach individual boards even from pre-laid surfaces
  • No need to carry out additional adjustments

Stable and Durable Aluminium Substructure

  • A wide range of configurations are possible using several aluminium profiles which are mounted with the patented fastening clip (Clip-JuAn®)
  • 30-year guarantee on the aluminium substructure

Top Link – one clip enables two vertical substructure rails to be connected very precisely

  • Easy to connect vertically using the Clip Top Link
  • Quick to install and can be easily disassembled

Top+ – height adjustment with just one levelling pedestal

  • Can be constructed to just under one metre in height and remains completely stable
  • The load is concentrated onto the middle of the pedestal up to a gradient of 4% by means of a level compensator
  • Load-bearing capacity 2 tonnes/m2 distributed across four levelling pedestals

Top Rail – substructure for particularly low surfaces

  • Height adjustment from 8 – 36 mm
  • The smallest high top rail + deck: from 39 mm
  • For new or existing concrete, stone or tiled surfaces

Top Cube – Fascia Board With Clips

  • Fascia boards can be easily and precisely installed and disassembled by attaching/detaching the clips
  • No screws required so no screws are visible

Other Possible Applications Using Clip-JuAn®

  • Cladding
  • Screening
  • Ceilings
  • Eave fascia boards
  • Raised beds for gardening
  • Solutions for slopes

GRAD Decking Planner – in 2D and 3D

  • High-quality and individualised decking planner which produces a list of required materials and accessories, assembly plans and cost control steps
  • Easy to generate when preparing quotations and during the contract phase
  • Changes to the plan are easy to implement

Does this sound interesting? Please do not hesitate to contact us! The experts at Weltholz will be pleased to assist you.

Available to download: Weltholz Information August 2018  GRAD-System: A New Generation of Decking