Even minor hairline cracks with a width of max. 0.5 mm can permanently damage a façade over time. In this situation, the repair of the façade is simple.
Cracks with a width of less than 0.5 mm are covered with a crack-filling, fibre-reinforced primer coating to bridge the cracks ready to be finished in a paint topcoat.
Apply Baumit FillPrimer reinforcing primer to the old render to cover the hairline cracks and minor damage.
Follow with a new coat of façade paint. Choose from Baumit StarColor, NanoporColor or PuraColor.
Assess the size of cracks in the facade. The surface of the facade must be firm and free of dust and algae. Brush or pressure wash the dusty and dirty facade and remove any other deficiencies.
Prepare Baumit FilPrimer bonding primer, a new façade paint, a façade roller or equipment for machine application of the façade paint.
Sufficiently stir the bonding primer in a bucket. If necessary (e.g. during very hot weather) it is possible to add max. 5% water (max. 1 L water/25 kg bucket).
Apply Baumit FillPrimer to the old render with a roller or brush, evenly without breaks. The coat will bond the cracks up to 0.5 mm in width. Curing time before application of the next layers is minimum 24 hrs.
Apply two layers of high quality façade paint to the clean façade. The first coat is applied diluted with 10 - 15% water. After a break of a minimum of 12 hours, apply 1 to 2 coats of the facade paint as required. Allow a minimum of 4 hours between each coat.
Baumit façade paint may also be applied using an airless spray machine. It allows fast and even application of the facade paint in a short time, perfect for large surfaces.