Was ist Kalkputz
Lime plaster is always a mixture of quick lime, which is the binding agent, and suitable sand. The sands in the finished lime plasters are perfectly matched to the application and make it easier to work with the plaster.
Lime plaster is a natural building material recommended from a building-biology perspective, thanks to its diffusion-open and mould-resistant properties alone. Coarse or even insulating undercoat plasters and fine, smooth topcoat plasters can be produced from lime and suitable sands, which are equally suitable for interior and exterior walls. You can buy lime plasters in the clay shop from well-known manufacturers such as Saint-Astier®and Hessler. The large selection of products is divided into different categories based on the areas of application. In addition to the high quality of all our products, we also make sure that you can see their composition. It goes without saying that we therefore declare them as transparently as possible.
The additives that you might find in our plasters are celluloses or caseins. Cellulose in a ready-to-use mortar is building biologically justifiable. It holds back the water in the plaster during processing, as it must not dry out too quickly.
Cement is mixed in with many finished plasters. This changes the properties of the plaster significantly: A cement-based lime plaster is no longer so soft and flexible and its diffusibility is also reduced: it can no longer absorb and release as much moisture. Almost all lime plasters from Hessler and Otterbein that you can buy at Lehm-Laden are cement-free (and it is declared for the few products for plastering facades), so that the plasters are perfect for renovating old buildings and the framework.
Applying lime plaster
When working with lime, the first thing to think about is safety: unlike clay, lime is alkaline and can irritate the skin and eyes. We hereby expressly recommend wearing protective goggles and gloves!As with any plaster, a multi-layer structure is also useful for lime plaster. For coarse substrates and thick layers, a lime base plaster is used, which is also suitable for filling the cavities between the pipes of a wall heating system. Mesh layers can then be implemented with an alkali-resistant reinforcement fabric, for example a starched jute mesh or a so-called glass fiber mesh, and the base plaster.
Finally, a fine-finish lime plaster or fine lime colored plaster is usually applied. These finishing renders can be colored individually with quick-lime pigments (attention: precise documentation or a recipe is necessary to reproduce the exact shade!), or by adding pigments or effect surcharges they enable creative surface designs. Special substrates require special lime plasters. The lime insulation plaster is ideally suited as interior insulation, either as a full-surface insulating plaster or as a single-layer lime insulation plaster. An application thickness of only 3 cm causes a clear difference in surface temperature and room climate.Suitable substrates for a lime base plaster are bricks, masonry, concrete, plaster bases, load-bearing old plaster, mineral insulation boards and such boards made from renewable raw materials. Lime finishing plasters are also available "in very noble": With Tadelakt, Lime smooth or Marmorino you can create very special surfaces, but these techniques require a lot of specialist knowledge, experience and craftsmanship.
Save time with modern specialist limes: Saint-Astier Kalamua
Lime plaster is traditionally applied in several coats. However, anyone looking for an efficient yet high-quality solution in terms of building biology will find an excellent alternative in Saint-Astier Kalamua. As a so-called “monocouche” (single-coat plaster), it combines the reliability of modern site practice with the proven quality of natural hydraulic lime (NHL).
It can be applied very smoothly both by hand and by machine and offers excellent moisture management. Thanks to its high purity and brilliance, you already get a finished, decorative surface after felt-floating that requires no further coat of paint. Ideal for anyone who values an authentic look with reduced workload.
Learn more about applying Saint-Astier Kalamua
