How to make paving stones
To give a paved area a high level of stability, you have to fill in the paving stones. There are four materials to choose from.
Suitable materials for grouting paving stones
Paving stones can be grouted with sand, quartz powder, rock powder or joint mortar. The materials have different prices and applications. First and foremost, the choice depends on the price and the advantages and disadvantages of the building materials.
Conventional sand is inexpensive and able to be infiltrated. It is recommended that a lime or crushed sand, as this joint sand brings about a better consolidation. The sand is processed in the wet state, as it soaks better. Disadvantage of this building material is that it is prone to wild herbs and insects. Furthermore, the supporting properties of sand are rather low. Therefore, conventional sand is mainly used for large rustic cobblestone areas.
Quartz sand also gives the paving stones little support, but the joints can be kept smaller. Quartz sand seeps in during grouting due to the grain size better. This makes the surface more stable. The white look speaks just as much for this building material as the easy use. This joint sand should be processed when wet. When infested with herbs and when cleaning with a high-pressure cleaner, however, he has the same disadvantages as conventional sand.
Basalt flour is processed dry, as this joint sand clumps in moisture. Although the price is more expensive than quartz sand, the supporting effect is higher. Otherwise, this material has the same advantages and disadvantages as quartz sand. Visually, you get a dark joint with the rock flour.
The most expensive, but also the highest quality method for grouting paving stones is grout. Here you should use a plaster joint mortar based on synthetic resin. The mortar seals the surface so well that no wild herbs or insects get through. However, the water can only moderately seep. When cleaning, however, the joint material is not flushed out. The processing is different depending on the manufacturer. But it is in any case more expensive than the previous materials. In addition, care must be taken when laying the plaster on expansion joints.
Laying the paving stones properly before grouting
As a rough guideline one can say: If a loose laying bed is made of gravel or sand, use a loose joint material. In a rigid bed, as in a terrace, you fall back on a grout. The joint spacing is three to four millimeters for standardized paving stones and five to eight millimeters for non-standard natural stones. The grouting should always take place before shaking, as otherwise the stones can move.
Select the grouting material correctly and process it quickly
Especially with grout, the processing must be carried out quickly, as otherwise a veil may form on the stones. But the other building materials should be processed quickly. Furthermore, it must be clamped after shaking at least a second time. The work steps must be repeated until the pavement surface can no longer receive any joint sand.
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