Frequently Asked Questions

We recommend the addition of a 2 cm top layer of 5/15 or 8/16 driveable aggregate to ensure that all the cells are completely filled. Once the aggregate has been poured into the stabilisation module, it should no longer be possible to see the module itself.

Yes, our terrace edge finishing profiles, paved side finishing plate and paved terrace side cladding support are all suitable for use with terraces on sloping or uneven ground. In practice, it is not the finishing accessories that adapt to the slope, but the paved terrace riser pedestal. Adjusting the height of the riser pedestal makes it possible to compensate for a slope or uneven ground and to finish the edges of your terrace using our finishing profiles, paved terrace side cladding support and paved side finishing plate. However, we strongly advise you to prepare the ground thoroughly to create a level, even surface and avoid any unpleasant surprises in terms of poorly corrected slopes.

Jouplast® extra-flat riser pedestals, such as the Plogom flexible paved terrace riser pedestal, are specifically designed for low-height terraces. They enable construction of a raised slightly terrace with no need for major structural modifications. These slim riser pedestals are ideal for terrace renovation projects and for working in small spaces and small terraces, such as those on balconies.

The Jouplast® acoustic damper is a shock absorbing pad specifically designed for ceramic tiled, stone or concrete terraces built on riser pedestals. Made from recycled tyre rubber, it damps vibrations and reduces impact noise and resonances. Located on the head of the riser pedestal, it improves paving grip and helps to compensate for differences in paving thickness. The results of CSTB test AC20-26087574 demonstrate that its use reduces resonances by half, compared with a riser pedestal alone, improving comfort in use and delivering optimal acoustic performance.

The Cleman® self-levelling 40/55 riser pedestal can be used on uneven ground or an existing concrete slab. 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) guarantees fast and precise installation. A riser pedestal must be positioned under each corner of each paving slab, in accordance with the recommendations of the manufacturer.

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.

Jouplast® multipurpose forked packers can be used for a wide range of interior and exterior jobs: fitting and adjustment of joinery (doors, windows, frames, etc.), installing cladding and panelling, furniture assembly, assembling timber structures, fixing component parts of frame structures, packing for timber terraces, etc. Their robust structure and ease of use make them an essential tool for professionals and DIYers.

Our strong recommendation is to prepare the ground correctly before beginning the project. The choice of aluminium decking joists is crucial for durability. Laying a decking terrace on aluminium joists must be done correctly. Having made that choice, our advice is to read the installation instructions. Using our joist protection tape between the joists and decking boards prevents water retention and extends the life of the aluminium joist decking.

The Jouplast® isolation mat should be inserted between the terrace riser pedestals and the substrate (paved or other solid surface, for example). It can also be used on waterproofed substrates. It is simply inserted under the riser pedestal before terrace construction. Several mats can be laid on top of each other where the extra thickness is needed to adjust the height or provide a greater level of insolation. Please note that these mats are suitable for outdoor use only and should not be used on aggregate surfaces.

The Cleman® adjustment wrench is quick and easy to use. Once the paving has been laid, insert the wrench where the paving slabs intersect and adjust by turning counterclockwise to raise the height of the rise of pedestal, or clockwise to lower the height. This process enables the height and alignment of paving slabs to be precisely adjusted for optimum results. If any resistance is felt during the adjustment process, our recommendation is to stop turning the wrench and complete the adjustment manually using the screw adjuster.

All our modules are made from 100% recycled polyolefin, polyethylene and polypropylene. This means that 100% of our plastic raw materials originate as textile industry waste. We use no virgin raw materials. All our honeycomb stabilisation modules come with a 10-year warranty when laid in full accordance with our installation instructions and our general terms and conditions of purchase. Since they are laid with no foundation, they impose no environmental impact, and can be easily removed at any time.

Il est nécessaire de préparer la surface sur laquelle sera installée votre terrasse en dalles. Un sol non préparé (pose directe sur une pelouse, par exemple) peut évoluer dans le temps et bouger. En fonction du poids qu’il supportera et des conditions climatiques (sécheresse, fortes pluies…). C’est pourquoi, il est nécessaire de stabiliser le sol pour garantir une durabilité dans le temps à son projet.

The main constraint when installing on pedestals is the need for a minimum height under the threshold in order to install all the accessories required to build a terrace on pedestals.

Allow for a minimum height of 3 cm under the terrace slab.

NB: If the slab has a slope, use self-levelling pedestals, which will compensate for slopes of up to 5%. The same applies if the slab has uneven surfaces.

All our slabs can support weights that are perfectly suited to traffic.

Greenplac® can support up to 600 t/m² when filled with grass.

The mechanical strength of our slabs is the fundamental criterion in our development process, ensuring soil stability.

Installing a deck with Fixego® takes approximately 10 to 15% longer than traditional installation methods. The initial installation requires greater precision and therefore takes a little longer. However, preparing and installing the boards takes the same amount of time.

While we can give an approximate number of pedestals per square metre based on the size of the chosen decking, it is impossible to calculate the number of aluminium joists for a deck without looking at each case individually.

However, for a private deck, we know that for a 55 mm high joist, the recommended centre-to-centre distance between pedestals is 80 cm. For a 27 mm high joist, the recommended centre-to-centre distance between pedestals is 50 cm. The centre-to-centre distance is the spacing between the joists.

For an accurate quote, you can submit your project to us and it will soon be possible to carry it out on our Jouplast® application.

Au-dessus du stabilisateur de gravier, il est préconisé de déposer 2cm de gravier carrossable de granulométrie 5/15 ou 8/16 de manière à remplir toutes les alvéoles. Une fois les graviers déposés sur la plaque de stabilisation de gravier, nous ne devons plus voir la plaque.

Before you start work on building your decking, it is important to check that you have the necessary permissions or authorisations. In practical terms, if you are a homeowner, and depending on the size of your project, you may need a notice of intended building alterations or a construction permit. For more information, our advice is to contact your local planning department directly. Are you member of a joint ownership scheme? Don’t forget to ask your property management company for permission.

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