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The mineral waterproofing of balconies and terraces is carried out with crack-bridging systems such as KÖSTER NB 4000, KÖSTER NB Elastic Grey, or KÖSTER 21. These waterproofing materials can be walked on and covered with tiles, and they also adhere excellently to damp substrates.
The concrete surface must be mechanically cleaned. In addition, the reinforcing steel must be thoroughly cleaned of corrosion by sandblasting. Before the waterproofing is installed, the concrete is repaired with KÖSTER Betomor Multi A or with KÖSTER Z 1 and Z 2 and KÖSTER Repair Mortar R4.
After priming with KÖSTER Polysil TG 500, the installation of fillets on rising components and for leveling the surfaces can be carried out with KÖSTER Repair Mortar. KÖSTER SL Protect is recommended as a self-leveling surface equalizer.
KÖSTER Flex Fabric is embedded into the fresh first waterproofing layer in the wall-floor transition and in all areas at risk of cracking. The full-surface reinforcement is achieved by embedding KÖSTER Glass Fiber Mesh into the fresh first waterproofing layer.
The final installation of tiles and slabs can be carried out with the flexible adhesive KÖSTER BD Flexible Tile Adhesive.
For balcony waterproofing, the building regulations applicable in the respective countries must be observed.
The specifications in the Technical Data Sheets apply.
