Impregnate and protect walls

Impregnate and protect walls: impregnate

Walls must be protected from moisture because many common wall materials are more or less porous and therefore absorb water. In addition, water can penetrate through joints, such as between bricks, or fine cracks. On the one hand, this can damage the building material itself, on the other hand, the walls can become leaky, and finally mold can develop on a damp wall. An impregnating protective coating helps here - It can also be applied by inexperienced DIYers easily and quickly. The building material is saturated with a protective liquid at least in the near-surface area. Here are some tips and examples.

One mechanism of many protective coatings consists in the construction of a film, as mechanical barrier against ingress of moisture serves. In many cases, however, the hydrophobing of the building material can be more important and more effective.

Hydrophobing means that a building material equipped with an impregnation water repellent becomes. The hydrophobing draws into the pores and forms a water-repellent film there. This prevents water from entering the underground and causing damage there. The effect can be seen on the surface by the so-called "Wasserabperleffekt".

Additives can be added to a hydrophobization which, for example, have a fungicidal and / or biocidal action. So here you can Another protection against fungal and algae infestation be created.

Impregnate and protect walls: impregnate

Depending on the product, a hydrophobic impregnation can be spread with the puff, sprayed or rolled up as here.

Impregnate and protect walls: impregnate

When the impregnation is absorbed and hardened, the wall repels moisture - this is recognized by the dripping of the water droplets.

Impregnations and protective coatings on the outside

Hydrophobizations are used where moisture damage due to water penetration is to be expected. This mainly includes the external facade, it is the largest field of application for protective coatings. A facade is exposed to the weather, straight Driving rain can penetrate water on an unprotected outer wall and cause damage.

There are various protective coatings, which are used depending on the nature of the substrate can. Thus, for non-absorbent and poorly absorbent masonry a facade protection by a film-forming paint makes sense, for porous and highly absorbent substrates high-performance depth impregnation are offered.

Another important area of ​​application is the surface treatment of balconies and terraces. Especially with tiled surfaces, the joints are a critical area. If water penetrates here, it can lead to unsightly frost damage such as the "freezing" of tiles. With a balcony sealer, therefore, the entire area should be painted up to three times.

Impregnate and protect walls: protect

What applies to the wall is also important on balconies: the substrate must be protected from penetrating moisture.

Impregnate and protect walls: wall

A protective coating, also called "black tub", protects the Kellermauern from penetrating moisture from the soil.

Earth-contacting areas, such as basement walls, are externally provided with a thick coating, which in turn is often additionally protected against mechanical damage by means of insulating or drainage mats. The coating may contain bitumen and is usually recognized by the black color.

Impregnate and protect walls: protect

On large surfaces, impregnation is best applied by spraying.

Pre-treat the substrate and apply impregnation

Careful preparation of the substrate is very important for impregnation, as the protective coatings seal up to a maximum of hairline cracks up to 0.2 mm. Larger defects such as broken joints must therefore first be repaired. If possible, old coatings and paints should be completely removed, as they hinder the adhesion of a coating and the penetration of an impregnation.

If the substrate is carefully prepared, the coating or the impregnation can be painted on or sprayed on - spraying is particularly suitable for large surfaces. Of course, the consumption quantities also depend on the absorbency of the substrate.

The substrate must be protected from moisture until the impregnation has solidified or the paint has set, otherwise the substance will be rinsed out again and will not show the desired effect. Impregnations have to be refreshed after a few years, depending on the load.

Example: protect the basement wall from the inside

A basement impregnation protects the inside of masonry and soil, which are occasionally wet, from damage and efflorescence. It has two advantages: The impregnation is quick and easy to apply, and interior products are solvent-free - making them suitable for treating both small and large surfaces.

Here we show you the most important steps in the application of a protective coating. In any case, please observe the processing instructions of the respective manufacturer and follow the suggested steps for the preparation of the substrate and the drying times.

Impregnate and protect walls: protective

Peeling paint, efflorescence and flaking, loose old paint is removed by scraping and brushing with spatula and wire brush from the basement walls. If mold is already present, it must be combated with suitable means.

Impregnate and protect walls: wall

Now protective coating or impregnation can be applied. With manageable surfaces, this is also very fast with the tassel.

Impregnate and protect walls: wall

After curing, the wall can be provided as usual with a plaster or a coat of paint.

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Video Board: Sikagard® 703 W Invisible Water Repellent Impregnation for Facades and Walls