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.

General information

Uniclass 2015

Ss_30_20_30_25 Decking systemsPrimary


Q55/110 Deck

Specification data - Decking systems

Product Reference

Grad Deck System – Composite


Fire rated, Class B

32.7 kg/m².

Non-fire rated

28.6 kg/m².




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.



Consult manufacturer and insert requirements.

Not required

Standard product features

Board size (w x t):

120 x 25 mm.

Board length:

3.6 m.

Product Options


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.


Grad `Hidden Fix` Decking System Data Sheet

Grad `Hidden Fix` Decking System Data Sheet

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