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Structural wedges for decking

Decking wedges to suit all your needs

Facilitates installation
All you need to know
  • Drains water from under your terrace
  • Rot-proof
  • Protects the joist from ground moisture
  • Stabilises your structure
  • Adapts to all types of structure
  • 4 different types of wedge

The purpose of terrace wedges

Decking wedges can't be missed. They must be used when installing a wooden deck on a concrete slab. They allow rainwater to drain under the joists, preventing stagnation and rotting of the wood.

RUBBERPAD rubber wedges

RUBBERPAD wedges are designed to make it easier to install your terrace and wedge your joists. They are used on flat, hard ground and can be stacked up to a maximum of 5 wedges (wedging from 8 to 40 mm, beyond which it is preferable to use NIVO® pedestals).

The rubber used comes from recycled materials. They are a simple, economical solution to the risk of rotting or damaging the wooden structure of your deck.

Rubber shims guarantee optimum stability and watertightness for your wooden structure. This small installation accessory is designed to adjust the level and increase the lifespan of the structure.

Your deck structure is therefore protected from damp and the inconvenience of standing water on the wooden joists, ensuring that your deck structure lasts as long as possible.

They are dimensionally stable, rot-proof, quick to install and economical.

FLATPAD self-draining flat wedges

Polymer plastic - Polypropylene (200 pieces for 20 M²):

FLATPADs help water to run off under the joists of your terrace. Your terrace structure is protected from damp and the inconveniences associated with contact with water.

If the level of your ground means you need to adjust the position of the joists, adjustable shims are the perfect solution. They correct slight differences in height between the installation and the ground quickly and easily.

NIVO ® self-draining wedges can be stacked up to 3-4 pieces on top of each other, allowing you to optimise the layout of your terrace to suit the terrain. Stability guaranteed. For the highest adjustments, use adjustable pedestals.

They are available in 2, 3, 4 and 5mm and in bags of 200 mixed shims (4 x 50 shims of each thickness).

FORKPAD wedges

Available in boxes of 200, FORKPAD wedges are designed for use exclusively on concrete screed, making it easy to peg wooden joists into the slab. Their shape fits perfectly into the knock-in dowels, making them easy to screw in and install.

Fitted with a clip-on tongue, they fit together whatever the thickness to achieve the desired height, and can be held in place easily when fixing.

Essential for separating the joist from the concrete surface, allowing water to circulate under the deck. This accessory is designed to improve the lifespan of the structure.

Variable opening from 8mm to 12mm. One set for 15/20 m² of decking.

WEDGEPAD adjustable notched wedges

Polymer plastic - Polypropylene (60 pieces = 5m2):

WEDGEPAD notched wedges are specially designed to make it easier to fit your joists as precisely as possible and in record time!

Installing joists on wedges sometimes requires minor structural adjustments, and these adjustable wedges are the perfect answer in record time. They correct slight differences in height between the various unevennesses of the floor very simply and with great precision. The black, brown or green adjustable notched wedges can be used to adjust and regulate differences in ground level from 8 to 30 mm.

Highly resistant and non-deformable, the notched wedges can be fixed with dowels for added stability. They come in different thicknesses (8/12 - 13/18 - 19/30 mm) for optimum level adjustment. They provide insulation from the ground and precise wedging for your terrace.


FLATPADs are supplied in packs of 200:

 50 of 2 mm (red)
 50 x 3 mm (green)
 50 x 4 mm (yellow)
 50 x 5 mm (blue)

There are approximately 5 support points per square metre.

Dimensions: Length 80 mm - Width 26 mm


FLATPAD shims are supplied in packs of 200:

 50 of 2 mm (red)
 50 x 3 mm (green)
 50 x 4 mm (yellow)
 50 x 5 mm (blue)

Suitable for 10 mm knock-in plugs. FORKPADs can be stacked and wedged between the knock-in plug and the joist. Each FORKPAD must be spaced 40 to 80 cm apart, depending on the thickness of the joist.

Dimensions: Length 60 mm - Width 40 mm
- Suitable for 8 to 12 mm knock-in dowels
- Height adjustable from 5 to 20 mm

Using RUBBERPAD shims

RUBBERPAD shims are available in 3 mm or 8 mm thickness. The height can be adjusted from 3 to 40 mm (up to 5 shims of 8 mm).

Depending on the thickness of the joists, the shims should be spaced between two support points of between 40 and 60 cm.

Sold in packs of 24 or 48.

Using WEDGEPAD wedges

Supplied in packs of 60 :

 20 black shims 8-15mm
 20 brown shims 13-18mm
 20 green shims 18-30mm

When laying, the WEDGEPAD wedges should be spaced 40 to 60 cm apart, depending on the thickness of the joists. The adjustable height ranges from 5 to 30 mm.

cales pour lambourdes bois

 Increases the lifespan of your structure
 Allows rainwater to circulate under the joist
 Protects the joist against soil moisture

cales pour lambourdes bois

 Quick and precise levelling
 Corrects thicknesses from 2 to 5 mm
 Rot-proof and strong


 Fast, accurate levelling
 Corrects thicknesses from 10 to 30 mm
 Rot-proof and strong
 Can be screwed or glued


 Clip-on tongue
 Variable opening from 8 to 12 mm
 Fits over the peg

Technical documents

  • COBRA_CATALOG_2024.pdf

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