Buildings change. Dirt and air pollutants collect on the façades over time. Moisture can penetrate. If renovation work is scheduled the façades are usually cleaned, but sometimes this is not enough.
Over the years salts build up that cannot be removed by cleaning. If the render is replaced in these cases, the undercoat and the top coat must be able to deal with this damage potential as sustainably as possible.
The task of restoration render systems is to ensure a dry and efflorescent plaster surface for a long period and offer the brickwork long-term protection by allowing the salts to be stored in the plaster and therefore removed from the brickwork.
To achieve this, restoration render systems work in one of two ways:
- Restoration renders are water repelling but also highly breathable. This relocates the evaporation level from the surface into the plaster cross-section
- Undercoat renders assume the function of a storage layer. Liquid moisture and the soluble salts it contains should be able to penetrate the render and leave the salts
in the undercoat when the restoration render diffuses
Remmers Restoration rRnder systems are optimally suitable and proven. The permanently water repelling and highly breathable restoration render allows the brickwork to dry out, but keeps back the salts so that no efflorescence occurs. If there is a high level of salt, the surface can be equalised with a (pore) undercoat render that allows the salts to crystallize without causing damage. Alternatively, Remmers compress render, which is breathable and capillary-active, can be applied as a real dehumidification render. It ensures permanent moisture regulation and with 60% more pore volume, it offers enough space to store salts.