How to prepare facades for renovation with high-pressure water jetting

Facades are exposed to weather, dirt and ageing for many years. When cracks, spalling, loose plaster or failed coatings appear, the building envelope needs more than a cosmetic clean. Careful preparation of the surface is a key step in renovation, because the new layer can only bond reliably if the old material has been removed properly.

High-pressure water jetting is used to prepare facades on concrete, brick, natural stone, metal, wood, plaster and ETICS surfaces. In practice, it can remove dirt, plaster, varnish and paint using only water, often with hot water for improved cleaning performance. This makes it a practical method for professional renovation work where chemical-free processing is preferred and the substrate must be ready for the next step as quickly as possible.

The main advantage is that the surface can be cleaned thoroughly while preserving as much of the sound material as possible. On damaged facades, loose plaster must be removed before new plaster is applied. On painted surfaces, individual layers can be stripped back to create the correct base for fresh coatings. On brick facades, ageing mortar in the joints can be washed out so new mortar can be applied securely. This saves time compared with manual scraping and helps create a consistent result.

For renovation contractors and facade specialists, the method is especially relevant when building substance has to be preserved and work needs to be carried out efficiently. It is also important to consider wastewater handling, because removed material may contain pollutants and must be collected and disposed of according to local rules. Used correctly, high-pressure technology supports safe, effective facade preparation for durable renovation results.