Home > Companies > Outdoor Deck Company Ltd > Grad Deck System – Composite

Decking system with composite boards on hidden fixing support rails and height adjustable pedestals.

Features and benefits:

  • Fixings are completely hidden, even between the boards.
  • Includes fast-fit clips, which cannot be dislodged once fitted.
  • Attractive appearance.
  • Support rails have industrial strength.
  • Boards can be removed with no damage (using specific tools - consult manufacturer for details).
  • Space-saving - can be installed to lower heights than traditional decking.
  • A matching cladding system is available - consult manufacturer for details.
  • Low maintenance.
  • Can be supplied fire rated to Class B.
  • Quick, efficient installation - almost twice as fast as traditional methods.
  • Comes with a 15 year warranty.
  • Pedestal-based build-up height is from 66 mm.

Wood-Polymer Composite (WPC):

Formed by a single extrusion process which creates a highly resilient material. The composition is 35% high quality graded recycled high-density polyethylene (HDPE), 60% FSC® sourced European oak timber fibre, and 5% adhesives. The composite is:

  • Slip and stain resistant.
  • Strong and flexible (compliant with EN 15534).

Over time, the boards will weather down to a uniformly paler shade of the original colour.

Related literature

The following content references this product:

Standard product features

Board size (w x t):

120 x 25 mm.

Board length:

3.6 m.



Please note that when specifying a decking rail, live load requirement and planned pedestal centres must be considered. All rails are 3.7 m long, with clips fitted at the factory.


Different variants are available depending on the height required. Without pedestals, the Grad system can be installed with build-up heights as low as just 40 mm. Consult manufacturer for details.

NBS Specification

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This product is associated with the following NBS Create clause:
20-15-25/125 Deck system

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Outdoor Deck Company Ltd


+44 (0)20 8977 0820

Product reference

Grad Deck System – Composite


[Fire rated, Class B]
32.7 kg/m².
[Non-fire rated]
28.6 kg/m².


 - Rail:
[Conventional timber joist]
Consult manufacturer for details.
[18 mm flat rail (aluminium)]
0.7 kg/lm.
[30 mm rail (aluminium)]
1.1 kg/lm.
[45 mm rail (aluminium)]
1.2 kg/lm.
[62 mm rail (aluminium)]
1.3 kg/lm.
 - Pedestal:
Consult manufacturer and insert requirements.
[Not required]

Manufacturer details

Unit 6,
Teddington Business Park,
Station Road,
Teddington, TW11 9BQ
Tel +44 (0)20 8977 0820
Fax +44 (0)20 8977 0825
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