Ecological and natural alternatives are in vogue in many areas - including plasters and paints. But how good are natural plasters really, how is the price-performance ratio and what are the disadvantages you might have to put up with? Read more about natural plasters here.
Lime and loam as basic cleaning materials
The return to natural alternatives has led to attempts to resort to building materials that have been known from time immemorial even in plastering. These are mainly lime and loam in this case.
Lime plasters have generally enjoyed great popularity in recent years. They are considered to be an excellent type of plaster that has a particularly positive effect on the living environment.
This is due to certain properties of the lime: wirkt it has a moisture-balancing effect diff it is permeable to moisture as a mineral building material
- lime has an antiseptic effect and kills mold
- limescale can bind odors and in small quantities also absorb pollutants from the indoor air
- lime is a natural material that can be used also marketed ecologically often. In contrast to conventional lime plaster, natural plasters of lime are many times more expensive.
- Ecological aspects of lime
Whether organic lime or ordinary lime: the eco-balance of lime is not so excellent.
clay as finishing coat is one of the oldest and most natural building materials of mankind. Loam - unlike lime - has a fairly positive overall life cycle assessment.
Loam does not need to be laboriously produced; it is practically available as a finished building material in nature. The cost and the environmental damage caused by manufacturing account for clay plaster for the most part.
Loam can also be easily recycled and 100% reused. This also makes it a particularly sustainable building material.
Clay as a concealed coat
Clay as a concealed plaster is usually mixed with barley straw fibers. A well-known manufacturer of such plasters is, for example, the company Claytec (www.claytec.de). The processing of clay as a concealed plaster is relatively unproblematic. It can be started with the trowel or applied as a spray plaster.
However, rapid drying is required after application. In general, clay plaster requires that windows and doors remain open 24 hours immediately after the order. In unfavorable conditions drying equipment must be used.
Cotton plaster is only suitable as a top coat and above all as an alternative to wall paints or wallpapers. His life cycle assessment is also excellent. Cotton plaster is also highly recyclable and in production - apart from long transport routes - quite environmentally friendly.
Costs for eco-building materials
The costs for eco-plasters are usually many times higher than for conventional variants. For example, a 30 kg bag of clay plaster for an area of around 1.7 m² costs about 12 EUR.
With lime plaster, the ecological alternatives are also significantly more expensive, and cotton plaster pays off at least by its high durability, but depending on the manufacturer, it also costs around 4 to 9 euros per square meter.