Natural soil or grass

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  • For the construction of a hillside patio seating area surrounded by walls, considerable effort is needed. Four photos show the examples of the different phases of the project construction.
    close Considerable effort is needed for the construction of a hillside patio area enclosed by walls. The photos show the various phases of the construction process.

    Installation of a sitting area
    in the garden

    Four images show the construction of a seating area carved into the hillside. In the first step, the soil is removed to prepare the foundations. After that, the flooring slabs are cast in concrete. Half-hight walls support the hillside, ensuring privacy and serving as pots for plants. Mosaic terrace tiles in the color design Light Granite to complete have been selected to complete the project.

  • In a park on a grass-lawn there is a wooden house, climbing frame with slide and a nest swing built of natural tree trunks. The area under the play equipment has been covered with safety tiles thanks to the parents' initiative.
    close In a park on a lawn there is a wooden house, climbing frame, slide and a swing nest under which the play area has been secured with safety tiles.

    Safety tiles
    under a wooden house and a nest swing.

    Grass does not make a suitable protection under the climbing frame with a nest swing and a slide. Therefore, thanks to the parents' initiative and personal contribution, the play area has been secured with safety tiles. First of all, the existing grass had to be removed in order to create a sub-base for the safety tiles. In a few hours, the work was completed. The safe play equipment can be used by the children again.

The subfloor made of natural soil or grass

Places such as natural soil, grass, a lawn, a trampled playground or a ball game field, a garden or a building excavation site, sand or a sandbox — are not suitable for the direct installation of resilient WARCO tiles. The preparation of this unbound, not load-bearing sub-floor is necessary in order to obtain an environmentally friendly, water-permeable and a reinforced base course for the elastic flooring.

Generally, the ground under the safety and terrace tiles or interlocking pavers must be stable enough to receive the expected impact of the future load without deformation or damage of the flooring.

The load on play streets or pedestrian areas (also with truck traffic) is of course different to that on a playground or a garden terrace. Therefore, the optimal structure and the strength of the layers under the tiles are always dependent on local conditions, so those two factors should be adapted well to each other. The existing grown soil is also partially removed (excavated) so that a suitable base-course should be prepared.

The sealing of the soil with concrete or asphalt, thus creating a bound base, is not reasonable in economic and ecological terms. Therefore, WARCO recommends establishing an unbound, water permeable sub-base, which can be done in two ways:

  • The conventional base course underneath the terrace and safety tiles, patio floor or paving blocks consists of a layer of compacted gravel, is smoothed off by the grit levelling layer.
    close The traditional base course under the terrace tiles, safety mats, patio flooring or interlocking pavers consists of a layer made of compacted gravel topped off by the grit layer.

    Subfloor made of gravel

    Before interlocking paving blocks, patio slabs, safety mats or terrace tiles are laid on soil or sand, a permanently stable base course must be built there. A part of the existing soil should be removed first. The excavated area is then filled with crushed stone (gravel). The gravel is compacted and smoothed off with a thin layer of fine grit. The illustration shows an example of the structure of subfloor made of grit and gravel mix.

Guide
for the installation made on grit and gravel bedding.

  • The image shows that with little effort we may create a permanently stable subfloor made of a plastic stabilising grid. Grit is used to fill the grid on the existing floor.
    close The illustrations shows how we may build a permanently load-bearing and stable subfloor by means of a plastic stabilising grid. It should be only filled with a thick layer of grit.

    Installation of the plastic paving grid

    With relatively little effort and small ground preparation can be soil or sand changed into a permanently stable base course that would be appropriate under the installation of interlocking pavers, patio slabs, safety mats or terrace tiles. Here, a plastic stabilising grid may be applied for soil stabilisation. It should be laid on a relatively thin layer of grit. The image shows the typical structure of a subfloor made of grit and the plastic stabilising (grass) grid.

Guide
for the installation on a subfloor made of grid.

  • Building up a classic, unbound subfloor made of gravel under play equipment. Preparing the subfloor
    Construction of a classic, unbound base course made of gravel under play equipment on the future playground.

    Excavation
    and providing of gravel

    There is quite a lot of ground preparation necessary to create a proper, unbound base course from gravel mix placed under play equipment and under the safety mats. The excavation must vary according to the region and the conditions (so in some case frost-protection layer is necessary) and it should be done in the depth up to 50 cm, then we need one cubic meter of excavation and almost one cubic meter of gravel per two square meters of the existing surface. The use of an excavator might facilitate our work there.

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  • The structure of the levelling layer made of grit and the installation of safety mats on the compacted gravel base course.
Playground flooring
    The composition of the levelling layer made of grit and the montage of safety tiles on the compacted gravel base course.

    Installation of safety tiles
    on the levelled ground

    After the compaction (shaking) of the supporting layer made of gravel, a thin layer of grit is applied as a levelling layer and it is evened out till it is smooth. The installation height of the tiles is respected; the upper edge of the installed safety mats should be slightly above the upper edge of the border made of elastic curbs. On the load-bearing levelling layer, the safety mats are laid tightly with the elastic curbs. Cutouts of the tiles for the play equipment area can be easily made with a jigsaw.

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  • Now the installed playground set is waiting for the first child. Safe slide
    The installed playground set is waiting for the first children.

    Safe slide
    and a climbing wall

    The structure of the play equipment, being a versatile combination of a slide, climbing wall and a climbing net, situated on a synthetic fall-protection safety flooring is now complete. In the determining of the 'fall area' will help the minimum requirements (concerning the area covered by the safety tiles) that have to be precisely respected at the play site.

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  • The fall area, so the place around the play tower was measured according to the applicable standard EN 1176; more space around the tower, less room at the end of the slide.

Climbing tower
    The fall area around the play tower has been measured with respect to the applicable, binding standard EN1176.

    Play tower
    with a slide on safety tiles

    Not every playground equipment must be protected by synthetic safety tiles made of rubber granules. What matters is the critical fall height. In case of the see-saw visible in the foreground, the existing grassy ground should be enough. However, the area around the play tower with a slide and a climbing wall where exists the risk of a child's fall or an injury, has to be secured with safety tiles. The protective mats have been laid on a permeable unbound base course made of gravel layer.

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  • WARCO TZ - safety tiles are great way in ensuring an easily installed and cheap fall-protection surface in the form of a circular disk around a carousel. Carousel
    WARCO TZ - safety mats make an easily installed and cheap fall-protection area around a playground carousel.

    Safety tiles around
    a playground carousel

    We may use WARCO safety tiles with the integrated, form-fit interlocking zip connecting the tiles with each other, to build circular surfaces in any diameter economically and by ourselves. First of all, the play area has to be secured by means of WARCO-safety mats -TZ type. The interlocking zip-teeth connect the adjacent tiles. Next, the outer (and possibly inner) circle edges are marked. Then, we may easily cut out all the excess pieces with a jigsaw. Finally, on the prepared base course around the carousel, the tiles may be installed easily and accurately.

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