RDA | Self-levelling Adjustable Decking Pedestal


The RDA self-levelling adjustable decking pedestal supports all types of decking and flooring joists up to an impressive height of 1000mm.

  • The ball and socket joint creates a free-moving captive head
  • Provides slope correction of up to 10.5% (6°)
  • Accommodates bearer width of up to 100mm
  • Millimetre perfect height adjustment
  • Height extension collar raises the total height by 100mm
  • Holes in the base allow drainage and fixing to substrates
  • Wide base protects the roof membrane
  • Base can be cut down to allow for placement against the wall abutment
Download the datasheet


Base shock pads

Base shock-absorbent membrane pads can be installed under the pedestal/support base to enhance acoustic properties, or to provide additional protection to the waterproof system.

Technical Specification

MaterialPolypropylene (recyclable)
Biological/ChemicalResistant to moulds, algae, alkali, bitumen
Base diameter210mm/220mm
Head diameter135mm
Bearer capacityUp to 100mm
Working temperature-40°c to 120°c


CodeAdjustable Height Range
RDA-1Adjustable Height Range: 40-56mm
RDA-2Adjustable Height Range: 50-70mm
RDA-3Adjustable Height Range: 70-110mm
RDA-4Adjustable Height Range: 110-160mm
RDA-5Adjustable Height Range: 150-210mm
RDA-6Adjustable Height Range: 200-300mm
RDA-7Adjustable Height Range: 300-400mm
RDA-8Adjustable Height Range: 400-500mm
RDA-9Adjustable Height Range: 500-600mm
RDA-10Adjustable Height Range: 600-700mm
RDA-11Adjustable Height Range: 700-800mm
RDA-12Adjustable Height Range: 800-900mm
RDA-13Adjustable Height Range: 900-1000mm


Datasheet - RDA Decking Pedestal

pdf 0.16 MB

Download the overview for the system for more information

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