Renders are fully bonded to the substrate to which they are applied. In many cases, this bond is substantial.
While it may be desirable to remove existing material completely, there is a high risk of damaging the underlying substrate during the removal process, therefore an alternative solution may need to be considered.
Although the rendering is well adhered and basically sound, static cracks may collect atmospheric dirt and become unsightly over a period of time.
Inconspicuous cracks that remain dry and sound are usually best left alone. However, cracking may be a reflection of failure in the substrate and give cause for concern.
No matter how carefully done, cutting out and repairing cracks may not address the underlying problem and is likely to result in some differences in appearance over the area of the repair.
Treat cracks and finish with santane system
Existing materials need to be thoroughly investigated over all their areas, localised repairs carried out and the weber santane system employed to upgrade the facade.