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

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

When working with liquid applied bituminous waterproofing , prime the prepared and clean substrate with KOSTER Polysil TG 500. A fillet of KOSTER Repair Mortar Plus is installed at wall/floor-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. KOSTER KBE Liquid Film is suitable. Alternatively, the rubberized bitumen thick film sealant KOSTER Deuxan 2C can be applied. At wall/floor junctions and areas in danger of cracking, KOSTER Glass Fiber Mesh is embedded into the fresh first waterproofing layer.


A topping protects the waterproofing against mechanical damage. A gliding layer of two layers of plastic sheeting is installed under the topping.

Always adhere to the specifications in the respective Technical Guidelines.

 

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