Cobblestones are covered with cement - that's how it works

Cobblestone can be grouted either impermeable to water or impermeable to water. The impermeable grouting is usually done with cementitious grout. What you need to know about cobblestones with cement can be found out below.

Cobblestones permeable to water or impermeable to water?

Cobblestone is not only popular in road construction in, for example, traffic-calmed cities and old town centers. House and garden owners also like to cobble stones. You can grout a cobblestone or just water-impermeable. In the impermeable grouting of paving stones, cementitious grout is used.

When grouting cobblestones with cement

If you want to grout your cobblestones, the basic building regulations and rules regarding cement-bound building materials must be observed. The most important points would be:

  • do not grout during frost
  • do not overheat
  • Paving stones strong pre-sowing
  • always descending in descending direction

The temperatures when grouting paving stones

The mortar or concrete must not freeze. Therefore, even in the changing seasons only with cement grout may be grouted, if there is no risk of ground and night frost. Conversely, at too high processing temperatures also loses its qualities such as load capacity or cobblestone its supportive ability.

In warm regions, therefore, it may be that the cement is mixed with ice instead of water. Above 30 degrees Celsius should no longer be cast or grouted, if you can not implement sufficient shade.

Pre-wetting the cobblestone

The vigorous pre-wet cobblestone is very important because of the later aesthetics. Dry cobblestone absorbs a lot of water. If now grouting with dry paving stones, it would absorb the water of the grout including smallest particles of cement. Then the cement crystallizes out and can no longer be removed from the stones. Dried after grouting the cobblestones then looks spotty and dirty.

Always leave with the slope going

The grout must be mixed following the manufacturer's instructions. As a rule, the grout must be easy to flow. If you grout following the slope, make sure that the grout really spreads evenly in all joints. In addition, cavities can be better prevented, which could cause damage to the joint later in frost.

Tips & Tricks

This point when grouting cobblestones with cement is also important to you when you commission the work to a craft business: never allow the grout to dry in the joints and then sludge with water. According to the building regulations, this would be a serious construction error.

Artikelbild: Richard z / Shutterstock

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