What should you pay attention to, when applying reinforcing layer?

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First and foremost, you should use fibreglass mesh which is a part of the system. 

Why?

Because it is the only reinforcement of the adhesive layer, which should be properly submerged and can not be selected randomly. The grid is made of fibreglass with a special anti-alkaline protective coating, which strengthens the rigidity of the fibres. The adhesive layer, in which the grid is submerged is usually cementitious, therefore has a high pH - alkaline. If the coating applied to the grid does not fulfil its function, it may lead to degradation of surface layers of insulation during usage. Repair is expensive, if even possible.


Reinforced layer with a single layer of glass fibre mesh should have a thickness not smaller than 3mm, if it is made of cement based adhesive.

It is advisable, to use a double layer grid in parts of the facade that are exposed to impact, for example in parts of plinth, ground floor, in the area of the entrance to the building. In this case, installation of the mesh in the adhesive layer is performed twice to give a higher impact resistance, up to 60% compared to the single layer.


During assembly of reinforcement layer, weather conditions may affect its durability. It is a relatively thin layer so it should not be mounted at high temperatures and/or strong sunlight. Too rapid evaporation of water from the mortar or adhesive material, may affect the bond negatively. Low temperatures may also negatively influence the stability of the base coat - then the binding is incorrect. Additionally, temperature below zero can lead to freezing of the layer.

Solutions that are ideal for applying reinforcement layer in low temperatures.

Below are some very important technological principles to be followed in the implementation of the reinforced layer:

1. The mesh must be embedded in the mortar or the adhesive, holes on the surface should not be visible.

2. Each layer of mesh must be overlapped by 100mm.


3. Around the windows and doors use window expansion joints, which seal the connection between insulation and the woodwork.

4. Before installing the base coat, corners should be protected with aluminium or plastic corners beads with fibreglass mesh, at least 10cm wide.

5. Ensure correct installation of the thermal insulation, beads and base tracks - properly seal and shape joints.

6. Ensure correct installation of the windowsills.

7. Curing time between stages of project is very important - base coat must be dry and cured before applying the primer and final coat. Curing period is specified on the packaging of mortars or adhesives.


Last update: Mar 13, 2017