Waterproofing of balconies and terraces with liquid applied bitumen based waterproofing systems

Balconies and terraces are constantly exposed to rain,splash water and high temperature fluctuations. Therefore the waterproofing should always be crack bridging.

When working with liquid applied bituminous waterproofing the prepared and clean substrate is primed with KÖSTER Polysil TG 500. A rounded fillet made from KÖSTER Repair Mortar Plus is installed in wallfloor-junctions in order to protect the subsequent layers from damage caused by movement.

The waterproofing is carried out with a liquid applied coating in two layers. Ideally suitable is KÖSTER KBE Liquid Film. Alternatively the rubberized bitumen thick film sealant KÖSTER Deuxan 2C (4 – 6 mm) can be applied. In the wall-floor-junction and areas in danger of cracking KÖSTER Glass Fiber Mesh is embedded into the fresh first waterproofing layer.

A screed protects the waterproofing against mechanical damage. A gliding layer consisting of 2 layers of PE-foil is installed under the screed.

Always adhere to the specifications in the respective Technical Guidelines.

Waterproofing of balconies and terraces with mineral based waterproofing systems

The mineral waterproofing of balconies and terraces is carried out with crack bridging KÖSTER NB Elastic (white or grey). This waterproofing is resistant to foot traffic and can be covered with tiles. It also bonds to damp substrates.

Before installing the waterproofing the substrate is hardened and prepared with the primer KÖSTER Polysil TG 500. Fillets are installed with KÖSTER Repair Mortar Plus. In the wall floor junction and all areas in danger of cracking KÖSTER Glass Fiber Mesh is embedded into the fresh first waterproofing layer.

Concrete repair work is done with KÖSTER Betomor Multi A. The concrete surface must be mechanically cleaned and a solid substrate achieved. Reinforcement steel has to be thoroughly cleaned from rust by sandblasting. In case of severe damage the reinforcement has to be strengthened.

Minor damages in the concrete surface can be levelled with KÖSTER C-Coat, and painting done with KÖSTER Silicone Paint White.

Always adhere to the specifications in the respective Technical Guidelines.