Fibres act as a distributed micro reinforcement within the render, bridging micro cracks, preventing them from opening and expanding into visible defects.
FIBRE REINFORCED RENDERS FOR FACADE DURABILITY
Flexible, Strong And Easy To Apply – Engineered For Modern Facades
Ceresit fibre-reinforced base coats have long supported flexibility and crack resistance in ETICS systems. Building on this approach, fibre reinforcement is now extended to the render layer. Adding fibres at the surface helps improve stress distribution and can reduce risk of microcracks caused by enviromental factors. Used together, reinforced base coat and render contribute to a more balanced system - supporting durability, adhesion and consistence facade appearence over time.
Part of the fibres mix that we use, includes basalt fibres, characterized by a very high tensile strength, create a 3D volumetric reinforcement of the material (dispersed reinforcement).
Due to the fibre matrix, the render holds together better on the trowel, reducing material drop-off. This leads to a more comfortable and easy application and minimizes losses caused by material falling off.
By integrating fibres directly into the render, Ceresit enhances the material’s internal structure and behaviour. The fibres help the render respond more evenly to stresses, allowing controlled deformation under temperature changes or substrate movement.
This added reinforcement supports a more stable, cohesive surface layer – contributing to consistent performance and long-term façade durability.
Broken cross section of dry render
Cross section - fibre reinforced render
When a microcrack forms, fibres transfer tensile forces across it, slowing propagation limiting crack opening. Cracks may still occur, but they remain fine, stable and non-progressive.
Such controlled microcracs are far less harmful than wider cracs that allow moisture ingress and accelerate ageing, helping preserve both the appearance and protective function of the render.
- Thermal cycles create ongoing stress in the render layer
- Fibres help distribute these stresses more evenly
- Supports a more stable façade and consistent appearance over time
- Shrinkage during curing creates internal stresses in the system.
- Fibres act as internal reinforcement, helping to control these stresses.
- Supports a more stable surface during early stages and over time.
- Movement between ETICS layers can create additional stress
- Adding fibres to both base coat and render improve overall stability.
- Supports long-term layer adhesion without changing main parameters.
We are happy to support you with any questions regarding our products, where to buy, or what is the right solution for your project.
