Exterior plaster on brickwork


In new buildings in brick construction, the vote of the plaster on the brickwork is particularly important. Not every exterior plaster on brickwork is equally well suited.

Brickwork and plaster as a unit

Single-shell brick construction with modern, particularly heat-insulating bricks needs a matched in terms of strength and rigidity plaster system, in addition, the external plaster the diffusion - ie the dissipation of water vapor over the exterior plaster to the environment - should be supported as well as possible. In the long term, this also helps to ensure that the building fabric is optimally protected and preserved.

Particularly suitable here are lime and lime cement plasters, the latter being fundamentally more suitable because of the higher resistance. But also the respective plaster reason is of great importance, he must be "harder" than the plaster itself.

Many modern bricks, especially filled and highly heat-insulating brick types, require a so-called light plaster as external plaster.

Minimum thicknesses on brickwork

For brick construction, the minimum thickness of the plaster must be at least 2 centimeters according to DIN regulations. Only then can the deformations and movements of the components of the building, which occur in brick construction, take place without cracks and damage to the plaster.

For special tiles there are special cleaning instructions

Since today bricks are offered in many different variants, which also have consistently quite different material properties, it is necessary to follow according to the installed bricks also exact instructions for the exterior plaster and the plaster materials used, plaster thicknesses and the prescribed plaster base. This is not only about the insulating and moisture-conducting properties of the plaster, but also about the stability and the crack resistance of the exterior plaster on the brickwork made of special bricks. There is a comprehensive policy for this

Exterior plaster on old or very old brick walls

For old buildings - usually before 1940 - on the one hand, the condition of the brick wall as well as the mortar used between the bricks must be assessed in order to find the most suitable exterior plaster. As a rule, one should rather cautious with cemental plaster, and instead put on pure lime plaster. Great importance is attached to the structure of the subsoil and the individual layers during plastering.


Video Board: Stucco cement over brick walls or chimneys