Processing clay plaster: You should pay attention!

To avoid unavoidable damage, you should process your clay plaster properly. The plaster requires firm adhesion to a stable substrate - and must never dry too quickly: flaking and cracks would be the result.

Check and prepare the substrate

Before loam rendering, there is a need to check the intended substrate: loam plaster needs a clean, grease and dust-free carrier, which has a rough surface and sucks easily. If your walls are made of a highly absorbent material, it is advisable to moisten the surface immediately before applying the clay plaster. Make a smooth surface mechanically so that the plaster sticks better. Also, remove loose spots and then fill in the holes. Use reed mats to cover walls that are unsuitable for loam rendering - or apply a cement-white lime mixture as a pre-grout.

Processing of the material

Gradually add water to the raw material until you get a thick pulp. But beware: Do not let the consistency get so fluid that the plaster will flow on the wall! You can now apply the material with the plastering machine or, according to historical methods, throw the trowel vigorously against the wall. If you choose the second option, start at the bottom and carefully blend each spot. Your plaster layer should not be thicker than 1.5 inches! For loam rendering in several layers, allow the previous layer to dry first and moisten it slightly before applying the next coat. With the float, the clay plaster can be structurally decorative.

Practical tips

If loam plaster dries too quickly, it will crack easily: never speed up the drying process artificially! If you need a reinforcement - for example, if your substrate is made of different materials - you can incorporate a jute fabric in the upper third of your clay plaster layer.