Cleaning and Sealing Paving Stone
Paving stones are not only in the so-called public traffic area, for the design and as a material and covering for roads, for sidewalks, for squares and for driveways, a popular and appreciated material.
Especially the so-called old town paving, whose stones are also popularly and often called cat heads and characterized accordingly, enjoys increasing popularity and popularity also in purely private construction projects, for example, when paving yards and driveways or even corresponding paths in the garden.
But also colored paving stones made of concrete, still enjoy great popularity. No matter whether in the execution of construction projects in the public traffic area or also with privately acting builders.
When should paving stones be cleaned and sealed?
Paving stones, whether the legendary old town paving, often with history and story or also the simple and cheaper paving made of simple concrete, should be cleaned professionally on a regular basis and then, if possible, also sealed immediately after the corresponding procedure, in order to be able to achieve and preserve a long-lasting cleaning result.
Of course, it is absolutely comprehensible also for the layman that such paving stones clean and seal during the winter months would be absolutely senseless.
- On the one hand, the paving stones are covered with snow and ice during this period, and the road salt, which is usually used and applied on a regular basis, additionally damages their surfaces.
- On the other hand, during the frost period, it would be dangerous to try to clean with water the paving stones on a sidewalk or on a driveway accessible to the public and used by the public.
This could freeze there overnight, for example, and the icing could consequently be a dangerous source of falls with the types of injuries that might then result.
Thus, it is reasonable and expedient, provided that the cleaning and the corresponding sealing of the paving stones can be carried out in early spring and thus at the earliest at the end of the frost period and in a temporal connection with the spring-cleaning, which can be found everywhere in the city and country.
However, it may also be advisable to clean and seal the pavers during the year. This may be advisable, for example, if there is a significant amount of moss or dirt, or even an unsightly growth of algae, on the surface of such paving.
In this case, a suitable cleaning agent should be used as soon as possible, before the algae growth and moss on the pavement can spread and intensify. Then it becomes more and more difficult to get rid of the plague spreading on the surface of the pavement.
As it has been made quite clear in the previous text, the pavement on our streets, yards, squares, driveways, and paths is generally susceptible and sensitive to the growth of green algae, fungi, mosses, and more.
Paving simply represents a form of the sealing of natural surfaces, and thus it represents a product of human activity. However, the well-known principle applies on earth, according to which nature takes everything back in the end unless the hand of man can intervene again and again in an ordering and regulating manner.
Roads, squares, sidewalks, and yards would eventually become overgrown, overgrown, and even overgrown with bushes without the continuous landscape maintenance interventions of man. Basically, in the joints of the paving stones continuously namely dirt particles and with these than at the end also always a true multiplicity of seeds deposit.
These form their roots and can spread very gradually, first in the joints, then also on the surface of the paving stones. In addition, there are weed seeds, which first become visible as tiny black dots on the surface of the paving stones.
Later, the so-called green coating forms on the pavement. Nowadays, it generally consists of various types of lichens and fungi, and finally also of mosses and algae.
In order to stop and delay the victory of the almighty Mother Nature on our pavement for as long as possible, in order to preserve the visual attractiveness of the pavement or, if necessary, to be able to restore it in the short term, and in order to minimize the risk of slipping that regularly accompanies the growth of algae and moss, regular measures for cleaning and sealing pavers are urgently required and necessary.
Biological or chemical?
Of course, it is always a very important question to decide whether the paving stones should be cleaned and realized by those responsible, with biological or alternatively with chemical means and methods.
In practice, the opinions and views on this matter differ quite a bit, because everyone who regularly deals with and is entrusted with the cleaning and sealing of paving stones has his or her own empirical values.
In practice, probably also because they are better known and have historically been used and used far longer, the chemical means for cleaning the paving stones dominate.
They remove, for example, quite quickly, reliably, and effectively:
- stains from a bet and from oil,
- stains and deposits caused by weather conditions,
- lichens and mosses and stains that can come from lime.
Thus, it can be seen that when removing stains from the surface of the paving stones, chemical agents are the most useful, while fungi, mosses, lichens, and algae, should be eliminated and removed by biological agents.
Necessary tools, equipment, and materials for Cleaning and Sealing Paving Stone
Is the use of a high-pressure cleaner recommendable?
Time and again, as has already been said and stated, opinions heat up on the important question of whether and to what extent a high-pressure cleaner, can be approved, or recommended, for cleaning paving stones at all.
Today, however, the high-pressure cleaner, in its practical application and use, proves to be absolutely unsuitable for cleaning the comparatively delicate and sensitive types of surfaces and of structures, such as the paving stones generally used today may have.
Indeed, it is not uncommon for the use and application of such a modern and powerful high-pressure cleaner to cause and initiate massive damage to the surface of the paving stones. These are closely related to the very special design and mode of operation of such a modern high-pressure cleaner.
It produces a quasi-scalpel-like water jet, which causes a punctiform load on the surface of the paving stones. In practice, however, the surface of the paving stones is very often not up to the extreme punctual form of load.
The pressure of the high-pressure cleaner can be adjusted, so you can try it on a small area of paving stones.
Suitable and unsuitable means
- the so-called joint crater,
- the hard root brush,
- the spatula or also
- the cutter knife,
- the propane torch,
- the hard surface cleaner
On the other hand, the high-pressure cleaner and the various versions of the so-called stone cutter are definitely unsuitable.
- With soda
Popular is the above-mentioned cleaning of the paving stones with soda. Add 1 to 2 tablespoons of soda to 1 liter of water and let the mixture act on the pavement for about 5 hours. Safety goggles and gloves must be worn. Avoid contact with skin and eyes.
- With soft soap
Softsoap is mixed with lukewarm water and high-quality stone oil. This mixture is then left to act on the plaster to be cleaned for at least half an hour, after which it is simply rinsed off. The effect is convincing.
- With baking soda
Sodium bicarbonate is also popular and proven as a stain remover, not only on textiles but in practice also on stone. For this purpose, sodium bicarbonate is sprinkled on the plaster to be cleaned and, after a maximum reaction time of 30 minutes, simply rinsed off again with clear cold water.
- With vinegar
Today, paving stones and also normal types of concrete slabs can be cleaned quickly and easily with vinegar. Vinegar is mixed with water in a ratio of 1:1 and then spread over the pavement to be cleaned with a hard scrubbing brush. After a reaction time of at least half a day, the mixture can be rinsed off.
- Impregnate the paving stones
Impregnating paving stones and sealing them appropriately can be done today in practice with a simple paint roller and with the appropriate, very different types of agents that are available for different types of stone in any hardware store today