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Drainage Superstore Timber Decking and Flooring Adjustable Cradle - 10mm to 40mm

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Product Description

This self-levelling joist support system used for levelling uneven floors and supporting roof decking. The system is fully tested and conforms to the Loading Conditions for the Flooring as laid down in BS5399. It’s unique design and buttress thread enables the cradle to carry high loads with finite adjustment to allow for accurate levelling of the floor/deck surface.

  • Self-Levelling
  • No Packers Required
  • Easy to Install


Diameter: 90mm
Overall Height: 65mm
Load Capability: 7 kN/m²
Adjustability: 10mm - 40mm (Greater heights can be achieved using base plates)


It is the ideal solution for supporting timber joists for decking purposes on balconies and roof terraces. The unique recycled plastic body is designed to support joists keeping them off the roof deck and away from the drainage of the roof. Cradles can be adjusted to allow for the falls in the roof. The cellular rubber base support spreads and softens the impact of the imposed load.


The cradle can also be used on uneven and out of level floors. The design enables the soft sprung feel of a timber floor to be achieved over concrete sub-bases. The cradle allows for fast installation and removes the need for wet and slow drying times normally associated with cementicious screeds. The void created by the cradle can also be insulated or used for service runs etc. The system is ideal for use in fast track building programs or conservatory floors.

Technical Information

The cradle acts purely as a loading support, so care should be taken when loading the cradle to ensure that the sub-base can accept the load. The table of load centres is for a standard joist size. The load can be distributed by increasing the number of cradles.

Please note: This is a flat-based product. Please note the timber has to be 47mm or 2 inches wide, the height can be whatever you require. The recommended coverage is 1 decking cradle every 400mm per run of timber, this is dependent on load. This product will hold a 4" (100mm) x 2" (50mm) timber joist

Product Documents

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Questions & Answers


What width of timber can be used?


This product will hold a 4" (100mm) x 2" (50mm) timber joist

Product Reviews

5 / 5 6 reviews
Mr Calum B Gunn
13th February
Great product easy to use
K Frazer
1st October 2020
Bought for our new log shed that we built, as it was situated on a small concrete slope. These worked very well but can be difficult to keep in place. We ended up screwing some to the base once we knew they were in the right place. They are strong and well made and I hope they will keep the shed base dry and rot free for many many years.
24th July 2020
A great adjustable support, easy to adjust to the required height. made adjusting a 4x4m deck (made from wooden c24 47x150x4000mm joists) easy to build in 10mm drop in deck level to aid rain water run off. The entire deck is free standing and planted solid with no movement at all using these supports on a patio foundation. Would certainly recomend these over others (they are half tho cost and very well made, holding the entire weight of the deck and people on it)
Frank Bassett
20th June 2020
Great produce at a fair price
pearce Pearce
5th June 2020
30th May 2020
Very useful fitting to level up your decking, simple, well made and practical.
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Drainage Superstore Timber Decking and Flooring Adjustable Cradle - 10mm to 40mm

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