Frequently Asked Questions

The Jouplast® acoustic damper is extremely simple to use. It is simply positioned directly on the head of our Essentiel® paving and self-levelling riser pedestals. Pre-cut and easily cut to shape, the acoustic damper can be trimmed to suit the specific requirements of your terrace. We recommend that you follow this procedure carefully to ensure maximum effectiveness in reducing noise and vibration.

The number of riser pedestals required depends on the format of the paving used and the total surface area:

• For a 20 m² paved terrace using 60 x 60 cm paving slabs: 80 riser pedestals (4 riser pedestals per m²).
• For a 40 m² paved terrace using 80 x 80 cm paving slabs: 280 riser pedestals (7 riser pedestals per m²).

The exact number of riser pedestals required may vary depending on the type of paving and the recommendations of the manufacturer.

The surface on which the terrace will be built must be prepared before work can begin. Unprepared ground (e.g. unprepared soil or lawn) may change over time and can be subject to movement. Depending on the weight it will subjected to and the local climate (dry periods, heavy rainfall, etc.). For these reasons, it is important to stabilise the ground beneath the terrace to ensure its long-term stability.

Jouplast® ridged wedges are designed to wedge and level timber structures constructed indoors and outdoors. Their saw-tooth ridging system facilitates precise spacing and ensures maximum stability of joists, floors and other joinery. Available in two formats (90 mm and 170 mm), they provide adjustment from 11 to 40 mm, depending on the combination used. Compatible with flat packers, they are ultra-strong (crush resistance over 2 tonnes) and have moulded holes for easy fixing with no drilling needed.

Our solutions are adapted to all types of structure, including balconies, patios and sloping ground. Be careful to choose the right type of self-leveling riser pedestal for the gradient.

The paved side finishing plate support kit extender increases the height of the paving side cladding support by 20 mm. It is used to adjust the height beneath paving when installing terraces or other structures to ensure a flat finish and sufficient stability.

The Cleman® adjustment wrench can be used with straight or offset patterns of square and rectangular paving slabs, with the exception of 2/3 – 1/3 patterns. However, it cannot be used to adjust the height of the riser pedestals located under the longer sides of rectangular paving slabs, or with paving slabs thicker than 30 mm.

Our recommendation is to fill the honeycomb tiles with crushed gravel
graded to between 5 mm (min.) and 10 mm (max.).

Sur terrain brut 

› Décaisser le sol de sa terre meuble végétale sur environ 15 cm.

› Déposer un géotextile.

› Réaliser une couche de fondation composée d’un concassé 0/31.5.

› Compacter à l’aide d’une plaque vibrante.

NB :

› En fonction de la nature du terrain, une fondation drainante peut être réalisée en amont en déposant une couche de concassé de type 30/60 ou 40/80.

› Si la surface obtenue comporte toujours quelques défauts, il est préconisé de réaliser un lit de pose avec du sable de carrière ou sable concassé de type 0/4. Cela facilitera la pose des plots de faibles hauteurs.

› Il est recommandé de passer la plaque vibrante entre chaque couche.

› Sur un sol non plan irrégulier ou en pente, il n’est pas nécessaire de corriger le niveau. Utiliser le plot autonivelant qui compensera cette pente pour avoir une surface plane.

Sur dalle béton

› Éliminer toute pollution (débris, pierres…) pouvant gêner la pose et l’appui stable des plots.

› Vérifier les hauteurs disponibles aux seuils.

› Prévoir une hauteur sous dalle supérieure à 3 cm minimum.

NB :

Si la dalle présente une pente, utiliser le plot autonivelant qui la compensera jusqu’à 5%. De même, si la dalle présente des aspérités.

Jouplast® pedestals have a crush resistance test rating of over 1 tonne. However, the weight that a wooden or tiled terrace on pedestals can support does not depend solely on the strength of the pedestals.

Each type of flooring has its own strength. We therefore advise you to check with your timber supplier for more specific information.

More generally, if you plan to place a heavy item on your decking on pedestals, such as a spa, we recommend our PROFILDECK® solution (aluminium joists), which will allow for better weight distribution across the structure of the decking on adjustable pedestals.

Depending on the nature of your soil and the intended use, there are three types of stabilisation possible:

• Without foundations: this method is possible for covered projects on well-drained or load-bearing soil with sufficient slope. It can be used for temporary projects.
• With minimal foundations : this method is recommended for moderately draining and load-bearing soils.
• Conventional foundations: this method is recommended for low-bearing and impermeable soils.

If in doubt, do not hesitate to ask a specialist for a geological analysis (drainage and load-bearing capacity) of your soil.

To ensure your composite decking is a real success, it is important to choose it carefully and install it correctly. The different types of composite decking offer many elegant and modern possibilities. Composite boards mimic the look of wood, without the maintenance drawbacks.

There are several manufacturing methods for composite decking boards:

• Single-extruded boards are manufactured by mixing the components in a single step. These boards are inexpensive but not very durable.
• Co-extruded boards have additional protection, making them more resistant to UV rays and weathering.

There are also several possible components for composite boards:

• Wood fibres and plastic for a natural wood look.
• Additives to improve resistance to mould and pests for a look that is more reminiscent of exotic wood.

Finally, there are several types of finishes for composite boards:

• Boards with a smooth finish are non-slip and easy to clean
• Boards with a grooved finish offer a warm wood texture effect but can be slippery and difficult to clean, especially around a swimming pool or in a garden.

The use of a gravel stabiliser is not mandatory, but it is strongly recommended for several reasons:

Prevention of sinking and dispersion: without a stabiliser, gravel can sink into the ground and disperse, creating uneven and unstable surfaces.
Improved drainage: gravel stabilisers, often used with geotextile, allow for better water infiltration, reducing the risk of puddles and erosion.
Aesthetics and maintenance: a stabiliser keeps the gravel in place, maintaining the aesthetic appearance of the landscape and facilitating its maintenance.
Durability and resistance: gravel stabilisers increase the durability of the gravel surface, supporting heavy loads and withstanding harsh weather conditions.
In summary, although not mandatory, their use offers many practical and aesthetic advantages that can greatly improve the quality and longevity of your outdoor landscaping.

The durability of a terrace built on aluminium joists depends on several criteria.

It is highly recommended that you prepare the ground properly so that the levelling of the terrain is stable, thereby ensuring the longevity of the pedestal supports. We recommend watching our video on ground preparation for more information.
The choice of aluminium decking joists is itself a factor in the durability of the decking, as already mentioned in the section on the advantages of this installation system. The aluminium material makes the joists rot-proof and highly resistant to weathering and UV rays.
The decking must be installed correctly on aluminium joists. To do this, we recommend that you read our installation advice. The joists must be fixed and aligned. Use our self-drilling screws, accessories from our range, to ensure the durability of your deck.
Floor insulation: to prevent moisture rising, we recommend installing aluminium joists on wedges or pedestals. Jouplast® deck pedestals are the best choice for optimal adjustment.
Use joist protection strips between the joists and decking boards to prevent water retention and extend the life of your aluminium joist decking.

Stone, concrete and ceramic tile paving are all options for riser pedestal terraces. Ultimately, the choice will depend on the intended use, laying pattern and, of course, the desired visual appearance of your paved terrace.

European timbers, including many softwoods, have the advantage of being generally more affordable than more exotic timbers.

• If the ecological impact of your project is an important factor, you might decide to use a European or even French-grown timber.
• Exotic timbers, on the other hand, are generally more costly, but tend to be more durable.

So it is clear that each species of timber has its own advantages and disadvantages. The best thing to do is speak to your supplier, who will be able to guide you towards the best choice on the basis of your visual, ecological and other preferences.

Yes! Jouplast extra-flat riser pedestals, such as the Plogom flexible paved terrace riser pedestal, are made from recycled materials. The fact that the material is more eco-friendly does not make them any less weatherproof or UV-resistant; quite the opposite, in fact! They are therefore highly resistant to extreme weather, including frost, and UV.

The Essentiel® 60 mm riser pedestal height extender is an accessory designed to increase the height of terrace riser pedestals by 60 mm. It is compatible with Essentiel® adjustable paving and decking joist support riser pedestals. It provides a practical solution for raising the height of your terrace without compromising maximum stability.

The Cleman® 130/230 mm adjustable riser pedestal is designed and used to create tiled, ceramic or paved terraces for pedestrian use. Its three-stage adjustment system (pre-setting using the driver bit, manual setting using the screw adjuster, and final adjustment using the special adjustment wrench) facilitates precise levelling. It ensures terrace stability, facilitates corner installation and offers optimised terrace side cladding. It is compatible with self-supporting paving compliant with class T7, T11, or F+. Not compatible with paved side finishing plates.

MODULESCA® 93 cm steps offer a quick and modular solution for building garden steps (straight, winding, zigzag, hairpin, etc.). Designed in glass fibre reinforced polypropylene, they are ultra-strong, rot-proof and suitable for gradients of up to 70%.Modules can also be assembled side-by-side to create wider steps (using the MODULESCA® connector kit).