WTA-compliant restoration render for masonry exposed to moisture and salt
Renovation renders
Renovation render systems are used for rendering damp and/or salt-containing masonry. Salts that damage the building material accumulate in the render and are kept away from its surface thanks to the hydrophobic properties of the material. WTA-compliant, single-layer renovation renders only have limited suitability for salt remediation. This is because the potential for storing salt is limited, there is a risk of the moisture level rising, and the space available for moisture transport is relatively low.
If there are high levels of salt in the substrate, it is recommended to use a renovation render system consisting of a WTA-compliant pore undercoat render and a WTA-compliant renovation render. A renovation render system with these distinct functions has various properties that can be used to extend the life of the building materials and have an overall positive effect on the building. The pore undercoat render is not water-repelling, which allows salts to enter. The exceptionally high porosity of the material means that it offers plenty of space to store the salts without causing damage. The permanently water-repelling and highly diffusion open renovation render allows the wall formers (masonry and undercoat render) to dry out while holding the salts back so as to prevent efflorescence and moisture spots at the surface.
If there are high levels of salt in the substrate, it is recommended to use a renovation render system consisting of a WTA-compliant pore undercoat render and a WTA-compliant renovation render. A renovation render system with these distinct functions has various properties that can be used to extend the life of the building materials and have an overall positive effect on the building. The pore undercoat render is not water-repelling, which allows salts to enter. The exceptionally high porosity of the material means that it offers plenty of space to store the salts without causing damage. The permanently water-repelling and highly diffusion open renovation render allows the wall formers (masonry and undercoat render) to dry out while holding the salts back so as to prevent efflorescence and moisture spots at the surface.
Remmers renovation render systems
Back in the 1990s, Remmers conducted a research project with the University of Münster, in which it developed its two-layer renovation render systems with distinct functions. SP Levell, SP Top white and SP Top rapid are the next stage in the evolution of the premium products from the Remmers renovation render series, which have proven their worth in years of practical application.
Thanks to a special formulation, the renovation renders can establish their water-repelling effect even at high humidity levels. Selected aggregates give the products an exceptionally high capacity for bonding salts, meaning that they can be used in a single layer for low to moderate salt loads according to WTA. If the level of damaging salts is in the 'red' zone, the results from the relevant research make one thing clear: it is always recommended to apply two layers with distinct functions. Here, an additional layer of SP Levell is added to the system. This gives the Remmers renovation render systems their outstanding salt bonding capacity and ensures their longevity.
Thanks to a special formulation, the renovation renders can establish their water-repelling effect even at high humidity levels. Selected aggregates give the products an exceptionally high capacity for bonding salts, meaning that they can be used in a single layer for low to moderate salt loads according to WTA. If the level of damaging salts is in the 'red' zone, the results from the relevant research make one thing clear: it is always recommended to apply two layers with distinct functions. Here, an additional layer of SP Levell is added to the system. This gives the Remmers renovation render systems their outstanding salt bonding capacity and ensures their longevity.
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