Who is looking for an ecological and healthy living space, and who wants to save expensive crafts, which is well-advised with plaster lime. You will find out in detail in this article which manifold benefits this type of plaster offers, and where it can be used everywhere.
Lime mortars and lime plasters
The technical terminology in DIN does not refer to plasters as plasters, but as a rule as mortar. Different DIN standards divide the individual plaster types into different groups.
Lime mortar (ie lime plasters) are taken into account in DIN 18550. There, all "pure" lime plasters, which consist of hydrated lime or hydraulic lime, form the group P1. This group can then be subdivided according to the composition, namely in
- air lime mortar, (1 a)
- water lime mortar (1 b)
- hydraulic lime mortar (1 c)
lime mortar can also be mixed with cement, the lime cement plasters then form but already a separate group with significantly different characteristics.
Thin layers of plaster (up to about 1 mm) can also be applied by rolling up (rolling plaster) or by brushing with the tassel (brushing plaster), instead of rubbing them up as usual. The grain of such plasters is usually around 0.5 mm, so they are no longer frictional.
Most lime-based coating plasters have a very simple composition. Mostly lime lime is used. This is a slurry of slaked lime (Ca (OH) 2) with water. Unlike quicklime (CaO), lime lime is not corrosive.
Benefits of limestone plastering
- Composition mostly of pure natural materials
- Easy to apply yourself
- No moisture load (especially important in dry construction)
- Good moisture regulation
- Mold inhibiting
- Interesting appearance
- Good ecological balance
Composition mostly of pure natural materials Kalk Unlike cementitious plasters, there are lime plaster plasters Often only a few and usually almost only natural substances. The main ingredient is, as already mentioned, limestone lime, are often found as admixture, the following substances:
- limestone flour
- linseed oil
- All these natural ingredients also provide good living health without chemical pollution by harmful exhaling substances (such as synthetic resin plaster) ,
Easy to apply
Painting or rolling plaster for it is no more difficult than painting a wall. Most plasters can be processed just as easily as wall paint. By doing it yourself you save a lot of money compared to professional plastering (which you really have to master).
Due to the low layer thickness of the plaster, however, roll and brush plaster is only suitable as a top coat.
No moisture load
Especially in dry construction, but also on other occasions, the building moisture is always a problem. Moist plasters bring a lot of moisture into the building - with roll and brushing this moisture is significantly lower (also because of the lower layer thickness). This can often be an advantage, especially where you want to avoid high humidity and long dry times.
Good moisture regulation
Lime has a high moisture absorption capacity. Rooms, which are plastered with lime plaster, can absorb and store a high amount of humidity and then slowly release it again. They effectively compensate for a damp room climate and provide comfort.
Lime plasters are strongly alkaline and therefore unsuitable as a medium for mold. Mold dies very fast on them because of the pH. This can - especially in our more and more moisture-laden and thus mold-endangered, airtight interiors - an effective prevention against mold.
Interesting appearance Licht The light falling on a wall covered with plaster plaster is not reflected directly, but only broken several times. Responsible for this are the lime crystals, which interlock with each other on the surface of the plaster. This ensures a very lively and warm look (unlike with synthetic resin plaster, for example). The stroking then reinforces the effect and creates interesting structures.
Good Life Cycle Assessment
Cement generally does not have a very good life cycle assessment; moreover, global cement production is a very high CO? Cause. Lime plasters, however, are almost CO? -neutral (except for the energy production during firing, which is very low). In addition, lime plasters are generally a very healthy and ecologically balanced building material.