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Quarrystones are becoming increasingly popular as an alternative covering for driveways, terraces and garden paths, because they look more natural than perfectly and homogeneously shaped stone slabs. Especially the different sizes and shapes of the individual stones make the charm.
Quarry stone slabs are often offered as polygonal slabs of natural stone. The word polygon comes from ancient Greek and means polygon. Thus, all plates are referred to as polygonal plates having multiple corners and angles; For example, they can be shaped like a triangle, a square, or even an octagon. Therefore, this name only says something about the shape, not about the material used. However, most polygonal plates are made of natural stone such as quartzite, slate, sandstone or granite. They are usually sorted in the quarry by thickness and packaged, so come to the individual dealers.
In addition, quarry stone slabs are often offered from volcanic rock under the name of porphyry slabs. They are unique, as the mostly gray or red foundations are interspersed with quartz, which attract attention in different colors such as white and black. Especially very large areas can quickly become restless with quartz-rich panels.
The stone slabs are usually 2.5 to 5cm thick and very variable in size. They are broken apart, partly sawn, with irregular, sharp edges. The surface is not quite smooth, but a little rough with slight elevations or subsidence and grooves provided.
Quarrystone slabs are available in natural colors such as various shades of brown, gray, black, white and red.
Especially as a terrace covering or as a natural-looking, yet fortified garden path, quarrystone slabs are becoming more and more fashionable. They look friendly and are quick and easy to relocate.
Even as a base for the driveway you can use them if they have a reasonable thickness and are laid on a concrete slab. The joints should also be cemented in order to achieve the highest possible load capacity of the plates.
But also the facade can be beautified with thin stone slabs.
As a rule, dry stone slabs are well-protected against frost and can also be used indoors. Smaller pieces also serve excellent decoration purposes.
In addition to the hardware store and retailers on the Internet, landscaping companies, civil engineering companies and building materials dealers often offer quarries for laying. These are often not new, so they can often be purchased there cheaply.
Some quarries offer the quarried stone slabs there also directly for sale, this however usually only to self-collectors.
General information about laying stone slabs
The soil should be raised to frost depth, at least 80cm. Before laying the panels, it makes sense to thoroughly clean them and remove any residue. Dry stone slabs are best tapped into the pebble or mortar bed with a rubber hammer. It must be ensured that no cavities between the substrate and plates arise. The gap should be about 3 to 4cm on average.
It is particularly favorable to create especially larger areas with a slight slope of about 1 to 1.5% away from the house, so that the water can drain off when it rains.
Lay masonry slabs without cement
Fill up the excavated area with gravel and compact it with a vibrator. Then spread a layer of gravel over it as a smooth surface. On the gravel then the stone slabs are laid, in the joints to distribute chippings or chippings. Sand is not suitable for use under the plates or in the joints, as it will quickly fall away, be washed away by the rain or be undermined by animals such as ants. Creeping, low-growing plants can sometimes be placed in slightly larger joints. Especially firm plants such as thyme, star moss or the mouse plant are suitable here.
The advantage of this method: it looks more natural than with cement. It is easier than concrete and is cheaper.
The disadvantage: the plates are not as solid as cemented, a rework after some time may be necessary. Especially if the plates are committed more often or even driven on and need to withstand greater pressure.
Lay dry stone slabs with mortar or cement
Again, the excavated area is filled with gravel or gravel, which is compacted. Then in the cheaper version, a minimum of 5cm thick mortar layer is applied to the gravel on which the plates are laid. It is expensive but also more stable to cast a concrete slab on the gravel as substrate and then to apply the mortar layer into which the slabs are tapped. For larger surfaces, a steel grid (called reinforcement) should be incorporated into the concrete, as otherwise the concrete threatens to break.
The joints are filled with jointing material (most preferably a mixture of quartz sand and cement in a ratio of 1: 3) and the plates thoroughly cleaned with clear water as soon as the joint material is pressure-resistant.
The advantage of this method is the strength. Especially for heavily used areas, the quarrystone slabs should be laid in this way. If the surface is traveled (for example, the driveway), the application of a stable concrete slab is necessary.
The disadvantage is that it is a compacted area, which loses its naturalness. If there is not enough slope, the water can not drain.