Fassadenputz: Mineral plaster

Natural jewelry for modern facades: Mineral plaster

Fassadenputz: Mineral plaster

The façade is the calling card of the house. It accounts for the first and decisive impression. Following the trend are effective plaster facades, the builders offer almost unlimited leeway: With a variety of colors, textures and forms processing every home gets its individual face. Only with mineral plasters the color elements are a real part of the building material. The color pigments are already incorporated in the factory and not applied as a final glaze. The crystalline structure of the surface makes it possible that tiny grains reflect the incident sunlight, and break. This results in a warm shade of authentic acting lively and is of great resistance.

Contents: Fassadenputz

  • Mineralputz: Tough and diffusion
  • Lime plaster facades protects permanently and naturally
  • plaster facade
  • process Fassadenputz on aerated concrete masonry
  • Properties of suitable plasters
  • Plinth plaster for lower facade area
  • Instructions for plastering with external plaster
  • Step 1: Prepare the plaster base
  • Step 2: Prepare the plaster profiles
  • Step 3: Apply plaster

Mineralputz: Tough and diffusion

Every house needs a robust sheath against wind and weather. But no one wants to feel, to live under a plastic cover. More and more builders opt for a mineral plaster facade. The decisive factor is the natural binder lime. Plaster with lime as a binder are characterized not only by its resilience, but rather its permeable surface can breathe the walls. Another advantage: Mineral decorative renders are suitable for any surface.

Lime plaster facades protects permanently and naturally

Fassadenputz: Mineral plasterPlaster facade with limestone facade plaster <br />Photo: djd / Bundesverband Kalk

Old plaster facades should be restored before from harmless damages tangible - and expensive - are problems. Reductions in the structure can cause cracks, frost and splashing set to the base area, water flow lanes and green stains spoil the facade.

Mineral exterior plasters are suitable for any surface and offer additional benefits. With lime as binder, they are characterized not only by resistance, their permeable surface allows the walls to breathe well.

The ecological balance of this building material used for millennia is excellent: Mineral plasters do not contain harmful additives that cause significantly lower emissions than other facade building materials and are fully recyclable. In connection with external wall insulation systems (EIFS), the heating costs can be reduced by about 50 percent.

plaster facade

process Fassadenputz on aerated concrete masonry

mineral light plasters are now used on porous concrete facades. These plasters are offered by almost all known plaster manufacturers and are matched in their physical properties of the porous concrete. Mineral plasters are in the cured state water repellent and have - in comparison with conventional mortars PII composition - a lower basis weight.

They also have a lower strength, which are less volatile under different processing conditions and drying conditions. Due to the lower modulus (i.e., resistance) to develop a reduced voltage when the moisture content and the temperature change mineral plasters. This makes them particularly suitable for thermal insulation lightweight materials such. As porous concrete, are suitable.

Properties of suitable plasters

Exterior plaster must diffusion, its good adhesion and extensible. Regardless of whether an outside wall on the weather or the protected side is: The plaster used must always be waterproof and weatherproof. In addition, the strengths of the individual layers of plaster should remove it from the underground to the surface.

Plinth plaster for lower facade area

The term "plinth plaster" refers to a particular type of cement-bonded plasters, which are applied to the façade. They seal the contact with the ground outside surfaces of the walls against lateral moisture.
This seal has to be carried out as planned to 300 mm above the ground to ensure adequate adaptability of the terrain surface. In the final state, this value must not be below 150 mm. Above the surface of this seal may be omitted if water-repellent materials have been processed in the wall, eg. B. flexible waterproofing and a commercially available matched to the aerated concrete external plaster.

Instructions for plastering with external plaster

Processing takes one or two layers as a low-flush and finishing coat. The flat surfaces of all the walls of cellular concrete products make it possible to use prefabricated thin plaster in the outdoor and indoor use.
The application of these Light plaster, such as plasterboard and Kalkgipsmörtel is described in DIN 18 550 P IV, which also render thicknesses of more than 20 mm are possible in accordance with, provided that the manufacturers have demonstrated this in the context of a suitability test.
In this way, all requirements can already be met with an exterior plaster thickness of about 15 mm. Forces of 3 to 8 mm sufficiently - the other hand, for the inner plaster - depending on the aerated concrete type. For very smooth surfaces, it is sufficient to revise deep joints and cable slots. This saves material and costs and reduce the work or construction phase.

Fassadenputz: Mineral plasterSweeping the wall surface

Step 1: Prepare the plaster base

Before starting the plastering work is the plaster base according to VOB Part C, to test DIN 18350: He must be firm, free of frost, free of dust and loose particles and separating substances. With a commercial street broom is coarse and is loose soiling from the wall can use a broom. Depending on the instructions of the substrate must be moistened may, primed or provided in some cases with a rough cast, so that the external plaster holds. A Spritzbewurf must be applied usually in a facade consisting of different materials, such. B. broken masonry. It reduces the absorbency of the substrate and improves its adhesion.


Fassadenputz: Mineral plasterfix plaster profiles for clear corners and edges

Step 2: Prepare the plaster profiles

Plaster profiles ensure clear degrees at the corners and edges of the facade and are partially coated with a special coating or PVC. Choosing the right profile depends on the used plaster and must be compatible with this.

To secure the building edges should be attached as possible Sockelabschluss- and corner protection profiles. Among them understand craftsmen corrosion resistant metal sections and preformed and reinforced glass fiber fabric. As corner profiles of metal exterior plaster only Drahteckwinkel should be used. In contrast, plaster profiles come in particularly weather claimed corners made of stainless steel used for. As in upper floors, which are oriented to the west and do not have a roof overhang.


Fassadenputz: Mineral plasterApplying the first layer of plaster with a trowel

Step 3: Apply plaster

Basically plaster is always applied from top to bottom and from left to right. Here, pay attention to the different drying times of each concealed places. Thus, needs. B. roll and Strukturputz be structured within 10 to 20 minutes after application. For plaster or dry mortar home improvement should produce only the amount as can be processed within an hour.

In the transition area to other building materials and difficult substrates such. B. shutter boxes or insulated ceiling fronts are, plaster reinforcements (Also called plaster reinforcing) is required. The reinforcement made of alkali resistant glass mesh or fine-meshed steel mats is placed either in the middle or in the upper third of the fresh plaster and gives it a higher tensile strength. It helps to avoid cracks and causes a so-called. Crack distribution,. H. if they do cracks, then take a few wide cracks many small hairline cracks that impair the function of the cleaning system either visually or physically.