Frequently Asked Questions

To ensure the stability of your terrace, it is essential to install your pedestals on properly prepared ground. Installation directly on soil, without earthworks or stabilisation, is strongly discouraged: the ground may settle or move over time due to weather conditions (rain, drought) or the weight of the structure. We recommend using our pedestals on raw, pre-stabilised ground or on a concrete slab. In both cases, the substrate must be clean, stable and well levelled to ensure the long-term durability of your project.

Jouplast decking pedestals come with a 10-year guarantee, subject to our installation guidelines and terms and conditions of sale.

Composite boards have an average lifespan of 20 to 30 years, though this will depend on the environmental quality of the materials. Solid boards are more robust and durable than hollow boards. Gentle, regular cleaning will help extend the lifespan of your decking. The UV protection on the boards is also important for withstanding high temperatures.

To build a straight or quarter-turn outdoor staircase using Modulesca®, the minimum slope of the ground must be 46% and up to 70%. Outside these two slope limits, it is impossible to install our Modulesca® staircase for your landscaping projects.

A base layer composed of 0/31.5 crushed stone must be laid to level the ground. This must then be compacted using a vibratory plate compactor.

Depending on the nature of the soil, a draining foundation layer can be laid using 30/60 or 40/80 crushed stone.

If the resulting surface is still uneven, we recommend laying a bed using quarry sand or 0/4 crushed sand. This will make it easier to install low profile pedestals.

We recommend using the vibratory plate compactor between each layer.

You can watch our video on ground preparation.

A raised composite wood patio has many advantages, but there are also some disadvantages to consider.

Composite decking on pedestals can be more expensive than a natural wood decking. It is easy to find good-quality, low-cost timber. As composite is a process that combines two materials, this is less often the case.

Composite, and particularly smooth boards, can be prone to scratches and may require regular cleaning to prevent unwanted stains.

Depending on the area of the terrace and the format of paving used, the number of riser pedestals required will vary. Nevertheless:

• For a 20 m² terrace paved with 60 x 60 cm ceramic tiles, 4 riser pedestals per m², so 80 riser pedestals in all.
• For a 40 m² terrace paved with 80 x 80 cm paving slabs, 7 riser pedestals per m², so 280 riser pedestals in all.

These quantities should be adapted according to the type of paving used and the recommendations of the manufacturer.

The Profildeck® fixing clip for clip-on profiles allows you to finish the edges of your decking quickly and easily. Simply install the accessory along the joist or at the end of the joist, secure it with a structural screw, and clip the Jouplast® finishing profile onto the accessory.

The way you choose to finish a terrace built on riser pedestals depends primarily on whether or not you want a neat finished look. To help you visualise what a terrace without a finished side looks like, imagine the side view of your riser pedestal terrace and its exposed components… The appearance is not very attractive, and it certainly doesn’t look very professional. Our terrace side finishing options also make it possible to hide cables and pipes beneath the raised terrace. Neat terrace edges are the finishing touch that makes all the difference and creates a professional appearance.

Yes, it is essential to prepare the ground before installing PLOGOM low-profile decking pedestals: for installations on concrete slabs, make sure to remove any debris that could compromise pedestal installation and/or stability.

Yes, up to four 60 mm height extenders can be stacked on a single pedestal. This solution allows you to achieve the terrace height you require without compromising structural stability and strength. It is important to respect this maximum limit in order to ensure the reliability of the installation.

The Cleman® adjustable 80/130 mm paving 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.

Here are the criteria to consider when choosing garden border edging:

• Which areas you want to border: flowerbeds, footpaths, lawns or aggregate?
• How would you like your outdoor space to look: modern, rustic, minimalist or contemporary?
• Which material do you prefer in terms of appearance: stone, metal, composite, concrete or plastic?
• What is your budget: metal, plastic and stone are more expensive, but will last longer. Timber is often more affordable, but tends to deteriorate more easily.
• What level of maintenance are you looking for: natural materials like timber and stone require regular upkeep to avoid deterioration. Plastic, composites and metal offer greater weather and frost resistance.

The lifespan of timber decking depends primarily on the quality of its structure. That is why our advice is not to neglect this aspect of the terrace project, even though it will not ultimately be visible. When constructing a decked terrace, ensure that its weight is evenly distributed, the structure is adequately ventilated and protected against rainwater by joist protection tape, and that the decking boards are spaced correctly, etc. All these details are important.

The paving spacers are designed to create even spacing between paving slabs as they are laid to guarantee uniform spacing across the terrace and comply fully with all project constraints. Ideal when laying paving slabs, tiles and even timber decking boards.

Each slope corrector for Essentiel riser pedestals can correct for gradients of up to 2.5%. Gradients of up to 10% can be corrected by stacking up to 4 slope correctors.

The MODULESCA® connector kit is designed to join MODULESCA® components together side by side, so you can create a new set of garden steps or extend existing steps to the required width. It uses a connector pin and clip to link two MODULESCA® modules or steps together.

To ensure the permeability of a commercial paved parking lot, here are some recommendations:

• Use URBANIT® stabilizing plates: Our plates are designed to allow the natural infiltration of rainwater into the soil. They are ideal for creating permeable parking lots.
• Choice of pavers: Use smooth pavers without irregularities to ensure stable installation.
• Proper installation: To make your parking lot permeable, it is essential to properly prepare your soil and interlock the URBANIT plates to ensure optimal permeability.
• Regular maintenance: Keep the parking lot clean and ensure that the spaces between the pavers are not obstructed by debris. Excessive debris can prevent proper water infiltration.

By following these recommendations, you can create a paved parking lot that allows for effective rainwater management and helps reduce the risk of urban flooding.

The spacing between pedestals will depend on the size of the slabs you are using.

As a general rule, one pedestal is needed at each corner of the slab.

For example, for 60 x 60 cm slabs, the pedestals should be spaced 60 cm apart in both directions.

For larger formats (such as 90 x 90 cm or 120 x 30 cm), it may be necessary to add a pedestal in the centre or along the sides to ensure proper support.

Always refer to the manufacturer’s recommendations for your slabs to determine the ideal spacing.

Composite patios tend to age well when the raw material is of high-quality and the deck is well maintained. Pay extra attention to the resistance of the composite boards and the installation system to UV and frost.

By installing composite boards on our Profildeck aluminium joist system, the installation is rot-proof and highly durable over time, even in saline environments such as coastal areas.

To calculate the number of steps required to build an external staircase using Modulesca® modules, we recommend visiting www.jouplast.com and consulting the step configurator.