Frequently Asked Questions

The Cleman® 130/230 mm pedestal is designed for installation on uneven stabilised ground or an existing concrete slab, including on sites with gradients of up to 5%. Do not use on loose soil or unprepared ground.

The Cleman® patio pedestal must be installed only on stabilised ground or a precast concrete slab. Each riser pedestal must be positioned under the paving in accordance with the recommendations of the paving manufacturer, with at least one pedestal at each corner of each paving slab. Its progress adjustment system provides for height adjustment before, during and after installation.

Profildeck® decking screws are specially designed to fix timber decking boards to Profildeck® system aluminium joists. Their self-tapping design ensures firm fixing with no need for pre-drilling. Manufactured from A4 stainless steel, they deliver excellent levels of weather and corrosion resistance.

Yes, Elevo decking pedestal is height-adjustable. It has an adjustment range of 95mm and a maximum height of 138mm. Where greater height is required, up to 4 Jouplast® 60 mm height extenders can be added.

The 3mm paving spacer is 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.

Yes, Cleman® and Easio® 60mm pedestal height extenders can be stacked. Up to 4 height extenders can be stacked to achieve the required terrace height. You can therefore adjust pedestal heights to suit the needs of your project, without compromising the stability and strength of the overall installation. To ensure installation safety, the recommended maximum number of height extenders that can be stacked is 4.

MODULESCA® 20 cm steps are used to create modular garden steps. Manufactured from glass fibre reinforced polypropylene, they are ultra-strong and rot-proof with a load-bearing capacity of more than 6,000 kg. They are the ideal solution for creating straight and curving garden steps. They can be used to widen existing MODULESCA® module steps or to create new flights of narrow steps.

Jouplast® fork shims are leveling accessories designed to simplify the installation and adjustment of all types of construction projects.

Thanks to their forked shape and flexible inner ridge, they easily snap onto a screw and ensure optimal hold during tightening.

Available in various thicknesses (1, 2, 3, and 5 mm), they can be stacked using their pins, allowing for precise level adjustments and quick setup.

They are extremely durable, do not deform under load, and can withstand pressure exceeding 2 tonnes.

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.

No, a composite decking installed on pedestals is not supposed to warp. The quality of the materials is, of course, paramount. Poor-quality products may expand under the effect of heat and contract under the effect of frost. Installation is extremely important and must be carried out properly. The boards must be secured correctly using the manufacturer’s fixing clips and spaced sufficiently apart to ensure the decking is ventilated.

Yes, ground preparation is essential before installing low-profile decking pedestals. Proper ground preparation guarantees the durability of the terrace and prevents the pedestals from moving over time. However, this ground preparation does not require major work.

On a concrete slab, make sure to remove any contamination that could hinder the installation and stability of the pedestals.

On raw ground, some simple earthworks will be necessary. Start by excavating the ground to obtain a flat base and ensure proper levelling. The use of geotextile and the creation of a foundation layer of crushed gravel are then essential to accommodate the low-profile adjustable pedestals in optimal conditions.

For installation on a waterproof surface, comply with the recommendations of DTU 43.1.

Our patio pedestals have a crush resistance of over 1 tonne. However, the weight that a wooden or paved patio can support does not depend solely on the strength of the pedestals.

Each type of flooring has its own load-bearing capacity. We therefore advise you to check with your timber or paver supplier for more precise information.

More generally, if you are planning to place a heavy item on your raised garden terrace, such as a hot tub, we recommend opting for our PROFILDECK® solution (aluminium joists), which will ensure better weight distribution across the structure of the raised patio.

Before buying pedestals, you need to choose the right size! Depending on the range of pedestals you choose, there are several sizes you can use to build your elevated patio.

Our paving pedestals are available in several sizes:

• The Essentiel standard range: adjustable pedestals from 8 to 20 mm, 20 to 30 mm, 20 to 40 mm, 50 to 80 mm, 80 to 140 mm and 140 to 230 mm. You can add Essentiel risers of 10 mm, 25 mm or 60 mm to certain pedestals. With the 140/230 mm pedestal and four 60 mm risers, you can reach a maximum height of 470 mm.
• The Essentiel self-levelling range: adjustable pedestals from 29 to 39 mm, 55 to 75 mm, 65 to 95 mm, 95 to 155 mm and 155 to 245 mm. The 10 mm and 60 mm Essentiel risers are also compatible with some of these pedestal sizes. With the 155/245 mm pedestal and 4 x 60 mm risers, a height of 485 mm can be achieved.
• The Cleman® standard range: adjustable pedestals from 28 to 40 mm, 40 to 55 mm, 55 to 80 mm, and 80 to 130 mm. All these pedestal sizes are compatible with the 60 mm Cleman® riser. By using 4 risers together with the largest pedestal, you can achieve a maximum height of 470 mm.
• The Cleman® self-levelling range: adjustable pedestals from 40 to 55 mm, 55 to 80 mm, 80 to 130 mm and 130 to 230 mm. Just like the standard Cleman pedestal, all sizes of the Cleman self-levelling pedestal are compatible with the 60 mm Cleman riser. By adding 4 risers to the largest pedestal size, you can achieve a height of up to 470 mm for your patio.
• The PLOGOM® : the Plogom® pedestal is only available in a single size of 10 mm.

Our decking pedestals also come in several sizes:

• Essentiel standard joist pedestal support: adjustable from 8 to 20 mm (the smallest joist pedestal on the market), 20 to 30 mm, 20 to 40 mm, 40 to 60 mm, 50 to 80 mm, 80 to 140 mm and 140 to 230 mm. Some of these pedestals are compatible with the 10 mm and 60 mm Essentiel risers. By adding 4 risers to the largest pedestal, you can achieve a maximum height of 470 mm for your timber or composite decking.
• Easio® pedestals: adjustable pedestals from 40 to 55 mm, 55 to 80 mm, 80 to 130 mm and 130 to 230 mm. These different pedestal sizes are all compatible with the 60 mm Easio® riser. By choosing the 130/230 mm pedestal and adding 4 risers, you can then build a 470 mm decking (excluding joists and decking boards).
• Elevo® pedestal: available in a single model, height-adjustable from 43 to 138 mm. This pedestal is also compatible with the 10 mm and 60 mm Essentiel risers.

Our paver stabilizer is compatible with all concrete pavers measuring 15×15 cm and 6 cm in height. It can also be used with interlocking stone or sandstone pavers, although these are less common due to their higher cost.

We recommend using pavers with smooth sides and without lugs. The pavers should not be aged, as they often have irregularities due to impacts they have received. While these irregularities can give them a unique and aesthetic appearance, they make the installation and movement on our paver stabilizing plates unstable.

According to the NF EN 1338 standard, the manufacturing tolerance is +/- 3 mm for a dimension of 150 mm. This type of paver is readily available in large DIY stores or from material suppliers.

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.

It is perfectly possible to install these pedestals on well-prepared uneven ground. They work equally well on existing concrete slabs, and can be installed immediately adjacent to existing installations with no problem.

These wedges are used directly beneath joists or any other joinery components requiring height adjustment. There are a number of rules governing their positioning:

• Provide clearance of at least 10 mm where joists are laid parallel to the direction of water flow; 20 mm where joists are laid at right angles to the direction of water flow.
• Leave the recommended spacing of 70 cm between wedges (depending on joist cross-section and type of timber).
• Space joists at 50 cm centres when using natural timber decking boards, and at 40 cm centres when using composite boards (check with the manufacturer).

Wedges can be screwed, glued or nailed in place to ensure optimum fixing.

Ideal for laying create tiled, ceramic or paved terraces, the Cleman® self-levelling 80/130 pedestal can be used to correct gradients of up to 5% on uneven ground. Its height adjustability provides greater flexibility for adapting terrace structures to project site constraints and the height of terrace required.

The Cleman® adjustable 40/55 paving pedestal is used to create tiled, ceramic or paved terraces for pedestrian use. It offers 3 adjustment options: pre-setting using the driver bit, manual setting using the screw adjuster, and final adjustment using the special adjustment wrench, all of which enables an extremely precise level of height adjustment. It offers not only fast and structurally stable installation, but also optimised side cladding facilitated by the 2 supports integrated into the base flange. This pedestal is compatible with self-supporting paving compliant with French classification T7, T11, or F+. It is not suitable for use with the paved side finishing plate.

Once the deck boards have been laid in accordance with French building regulation DTU 51.4., Profildeck® screws are screwed directly through the decking board and into the aluminium joist, using a maximum torque rating of 7 Nm (position “18” on a 20-position 18V cordless combi drill). It is important to check that the screws are compatible with the material used, particularly in the case of composite decking boards, which may require specific fixing methods.