Synthetic resin plaster for inside and outside

In addition to the conventional and long-established mineral plasters and synthetic resin plaster can be selected. Both variants have advantages and disadvantages that must be weighed for the particular plastering task. Pure synthetic resin plaster tends to be more suitable for outdoor use.

Advantageous properties of synthetic resin plaster

A synthetic resin plaster, also known as dispersion plaster, brings an exceptionally high resistance. It adapts elastically to environmental conditions such as extreme cold or high heat as well as high humidity. Cracks in the synthetic resin plaster are almost impossible.

The strong durability on almost all types of substrates make it versatile in use. Its nature allows lower application levels than required for mineral plasters. Another property, which is obviously an advantage, consists in the strong water-repellent effect and the diffusion-free closure of the masonry. However, this advantage is at the same time a disadvantage.

Adverse properties of synthetic resin plaster

The non-existent diffusibility of the synthetic resin plaster leaves rain wet through precipitation to dry only very slowly. This property provides a good breeding ground for the growth of mold and fungal spores. In the interior, the "breathing" of the masonry through a synthetic resin plaster, which can also lead to mold, this time in the masonry, eliminates.

The hermetic finish of the synthetic resin plaster prevents the natural regulation of humidity indoors. This function, often perceived as a pleasant indoor climate, results in greater reliance on heating systems and / or humidifiers when absent. If interior synthetic resin plaster is used, consideration must also be given to the presence of organic carbon compounds, which can cause odors and, at worst, health effects due to perspiration.

Advantages and disadvantages of mineral plasters

Mineral plasters are made of lime, cement, gypsum, clay, quartzite or clay. These ingredients are permeable and can "breathe". In this way they support the natural regulation of humidity. This property counteracts the preservation of the masonry. The balancing effect on the surrounding climate also helps to prevent the formation of mold and fungus. In addition, there is the alkaline effect of the minerals, which give the spores no breeding ground.

Mineral plasters, unlike a synthetic resin plaster, are prone to cracking, as their flexibility is less with external changes such as heat, cold and moisture. Outside, special plaster mixtures must be used to withstand the effects of weathering permanently.

Manufacturers develop combination plasters

The plaster makers try to combine the advantages of both types of plaster by combining mineral ingredients with synthetic resin. In particular, by the use of silicates and silicones arise at least partially vapor-permeable resin plasters.

Silicone resin plasters allow moisture to pass from the inside to the outside while providing protection against the effects of moisture and moisture from precipitation. This increases the drying speed, but does not reach the speed of permeable mineral plasters. Silicate plasters are more similar to synthetic resin plaster, but soften the "occlusive" effect on the masonry.

Tips & Tricks

In general, you can follow the rule of thumb that synthetic resin plaster is used only on the outside and mineral plaster for interior walls and ceilings.

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