This field poses the highest demands on the waterproofing. It must be able to resist the weather, be waterproof and provide a certain structural stability. Also, outside the movements of the construction members are usually comparably large so that it is necessary to use waterproofing systems with high crack bridging capabilities.
Waterproofing of balconies and terraces with 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 should be primed with KÖSTER Polysil TG 500. A concave fillet made from KÖSTER Repair Mortar Plus is installed in wall-floor-junctions in order to protect the subsequent layers from damages 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 cold applied self adhesive membranes
A fast and easy method for waterproofing balconies and terraces is using the cold applied self adhesive KÖSTER KSK waterproofing membranes.
The solid and clean concrete substrate is primed with KÖSTER KBE Liquid Film which provides an excellent bond between the concrete and waterproofing layer. In case of temperatures below 0°C the non water based KÖSTER KSK Primer SP is used.
A fillet in the wall-floor-junction can be easily installed by using the KÖSTER KSK Triangular Ribbon: Remove the protective foil, press into the primed corner, done! Alternatively, before priming the substrate a fillet made of KÖSTER Repair Mortar Plus is applied.
The standard area waterproofing is done with KÖSTER KSK SY 15. In case of temperatures below 0°C KÖSTER KSK AW 15 is the material of choice. The waterproofing membranes are simply bonded onto the prepared substrate and overlapped min. 10 cm on each side.
If the waterproofing is applied vertically onto a wall, the waterproofing membrane is mechanically fixed. Connections and overlaps are sealed with KÖSTER BS 1 Bitumen Paste. If the top end of the waterproofing is to be plastered, it can be covered with KÖSTER Butyl Fix-Tape Fleece.
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.
1 Waterproofing of balconies and terraces with mineral based waterproofing systems
