A damp-proof course or a waterproofing layer?
Protection against moisture ingress, or moisture protection for building components, is absolutely essential in a building. The key question here is what the waterproofing layer needs to achieve: a damp-proof course prevents moisture from transitioning into other building components. This is why it is installed, amongst other places, between the floor insulation and the screed. Waterproofing layers, on the other hand, remain watertight even when water accumulates and are used in roofs, kitchens and wet rooms.
Which flanges are suitable?
Whilst glued flanges are only suitable for moisture sealing when used with waterproofing sheets, the effectiveness of pressure sealing flanges depends on the thickness of the waterproofing sheet and the type of waterproofing sheet: a watertight waterproofing layer can be achieved with a minimum thickness of the waterproofing sheet of approx. 1.5 mm. The table below provides an overview of KESSEL pressure sealing flanges and waterproofing layers that have been tested and approved for watertight installation. Other waterproofing layers of the same design with a minimum membrane thickness of approx. 1.5 mm may also be used. However, confirmation that the waterproofing membrane is of the same design must be provided by the installer or the manufacturer of the waterproofing membranes.
When using stainless steel metal drains, there are several options available for applying waterproofing layers to the components. The exact procedure depends on the waterproofing layers you are using. Before installing such a drain, it is helpful to call our service centre: we will be happy to advise you on any specific considerations during installation.
Installation of waterproofing sheets with a pressure sealing flange
1. Lay the waterproofing sheet
Cut out the waterproofing sheet around the drain opening, place it on the open pressure sealing flange and clamp it in place with the mating flange. Please follow the relevant installation instructions.
2. Apply the next coat(s)
Fit the extension piece or intermediate section, then apply the footfall noise insulation or the cement screed and floor covering.
3. Repeat if necessary
If applicable, install the second waterproofing sheet in the same way as the first and second.
