Internal basement waterproofing on foundation plate with mineral systems

1 Horizontal barriers for walls
2 Installing fillets
KÖSTER Repair Mortar Plus
3 Primer
KÖSTER Polysil TG 500
4 Waterproofing layer
5 Protection layer / flooring

Mineral waterproofing systems have the advantage of excellent bonding properties of the waterproofing material to mineral substrates, the bond between the individual waterproofing layers is excellent too. The longevity of such systems is ideally the lifetime of the building.

To avoid moisture rising through the wall due to capillary action, it is necessary to install a horizontal barrier beneath the wall made from KÖSTER NB 1 Grey (mixed with KÖSTER NB 1 Flex) or the crack bridging material KÖSTER NB Elastic.

To harden the substrate the bottom slab is primed with KÖSTER Polysil TG 500. At the wall floor junction a fillet made from KÖSTER Repair Mortar plus is installed to prevent stresses in the subsequent waterproofing layers.

The area waterproofing is normally achieved with KÖSTER NB 1 Grey mixed with KÖSTER NB 1 Flex. For an extra fast application KÖSTER NB 1 “Fast” is the product of choice. In case of pressurized water the waterproofing needs to be done with the KÖSTER KD System. KÖSTER SL Premium is ideal for protecting the surface.

Alternatively the crack bridging waterproofing products KÖSTER NB Elastic Grey, KÖSTER NB Elastic White or KÖSTER NB Elastic 1C White can be used to waterproof the floor slab.

Always adhere to the specifications in the respective Technical Guidelines.



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