Internal basement waterproofing on foundation plate with mineral systems

1 Horizontal barriers for walls
2 Installing fillets
KOSTER Repair Mortar Plus
3 Primer
KOSTER Polysil TG 500
4 Waterproofing layer

Mineral waterproofing systems have the advantage of excellent bond strength between the waterproofing material and mineral substrates, and between the individual waterproofing layers. The longevity of these systems is ideally the lifetime of the building.

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

To harden the substrate, the bottom slab is primed with KOSTER Polysil TG 500. At wall/floor junctions, a fillet of KOSTER Repair Mortar Plus is installed to prevent stresses in the subsequent waterproofing layers.

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

Alternatively, the crack bridging waterproofing products KOSTER NB Elastic Grey and KOSTER NB Elastic White can be used to waterproof the floor slab.

Always adhere to the specifications in the respective Technical Guidelines.



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