Reinforcing fabric at corners

Corners are a checkpoint for every plastered surface. With the help of reinforcing mesh, you can better prevent the occurrence of such cracks. What should be considered when using reinforced mesh at corners and how it is processed, you can read in the following article.

When reinforcing fabric is mainly used

First, it should be noted that reinforcing mesh is not suitable as a plaster base. This is only possible in combination with a corresponding reinforcing mortar. Otherwise, reinforcement mats are used as follows:

  • as plaster base with reinforcement adhesive or reinforcing mortar for ETICS facades
  • as a primer in the interior in combination with reinforcing mortar
  • for preventing plaster cracks as plaster reinforcement, not necessarily in reinforcing mortar

You can learn more about reinforcing mesh in interior plaster by following our link.

Reinforcing mesh on corners of facades with ETICS

When applying reinforcing mesh to corners, it is necessary to differentiate between corners on facades when installing a thermal insulation composite system and inserting a plaster reinforcement in the interior plaster.

For use in the assembly of ETICS insulation boards there are special angle profiles for the corners, which are made of double reinforcement fabric. These are simply incorporated into the reinforcing mortar like a normal reinforcing mesh.

However, make sure that the material of the reinforcement fabric corners matches the properties of the reinforcement mortar and all other building materials. The keyword to be mentioned is the resistance to alkaline substances.

Reinforcing fabric on corners and edges of interior plasters

Inside the corners and edges of windows and doors so-called notch stresses can occur. In order to prevent this, strips of reinforcement fabric must additionally be inserted diagonally here. This is also evident from the installation specifications of the corresponding DIN EN. For the corners themselves, of course, also fabric angle profiles can be used. Again, make sure that they are resistant to alkaline substances.

Further processing of plaster or putty

Otherwise, the procedure is the same as for the other use of reinforcing mesh. The reinforcement fabric should always be inserted in the upper third of the entire layer thickness.

With an absolute layer thickness of 15 mm, you would first apply 10 mm putty or plaster, then place the reinforcement fabric at the corners as well. Now the top layer is applied 5 mm thick. The application of plaster or trowelling the filler takes place fresh in fresh, so before a skin can form on the first layer of plaster with the reinforcing fabric.

Tips & Tricks

If you want to use reinforcement fabric on the floor instead, the procedure is slightly different. Here, the fabric is not introduced into the upper third, but laid in advance. You can read in detail how the process of applying the reinforcement fabric for leveling compound works in detail in the linked guidebook.

Video Board: Corner Reinforcement with Kapco Easy Corners™