External basement waterproofing

Wet basements can not be fully utilised and can endanger the building structure.  We offer four methods for making basements usable again by applying a new, permanently safe waterproofing: From the outside with polymer-modified thick film sealants, mineral sealing slurries or cold applied self-adhesive waterproofing membrane – whereby the entire external wall area is treated and thus protected from water penetration. Alternatively, the waterproofing can be achieved by installing the external waterproofing from the inside via gel injection. This method can also be used when a new sub-basement is added to a house. In this case, the wall/floor junction is waterproofed externally without having to excavate.

Koster Aquatecnic Ltd advice sheets give pratical information on external basement tanking. Please click on the links to display in a new window:-

Advice sheet 5 : External Basement Tanking with KOSTER Deuxan 2C Thick Film Liquid.

Advice sheet 6 : External Basement Tanking with KOSTER Bikuplan Self-adhesive Waterproof Membrane.

Show references

External basement waterproofing with bitumen based waterproofing systems

1 Primer

KÖSTER Bitumen Emulsion
KÖSTER Bitumen Primer
KÖSTER Polysil® TG 500

2 Waterproofing pipe penetrations

KÖSTER Bikuplan® KSK Triangular Ribbon
KÖSTER Joint Sealant FS-V
KÖSTER KB-FIX 5
KÖSTER KB-Flex 200 Sealing Paste

3 Preparing wall/floor junctions

KÖSTER NB 1 "Fast"
KÖSTER NB 1 Flex
KÖSTER NB 1 Grey

4 Installing fillets

KÖSTER Bikuplan® KSK Triangular Ribbon
KÖSTER Repair Mortar
KÖSTER Repair Mortar Plus

5 Waterproofing layer

KÖSTER Bikuthan® 2C Supertight
KÖSTER Bikuthan®1C Supertight
KÖSTER Deuxan® 2C Extratight
KÖSTER Deuxan® Professional
KÖSTER Glass Fibre Mesh
KÖSTER KBE Liquid Film

6 Protection of the waterproofing layer

KÖSTER SD Protection and Drainage Sheet

External basement waterproofing with mineral based waterproofing systems

1 Primer

KÖSTER Polysil® TG 500

2 Waterproofing pipe penetrations

KÖSTER Joint Sealant FS-V
KÖSTER KB-FIX 5
KÖSTER KB-Flex 200 Sealing Paste

3 Preparing wall/floor junctions

KÖSTER NB 1 "Fast"
KÖSTER NB 1 Flex
KÖSTER NB 1 Grey

4 Installing fillets

KÖSTER Repair Mortar
KÖSTER Repair Mortar Plus

5 Waterproofing layer

KÖSTER NB 1 "Fast"
KÖSTER NB 1 Flex
KÖSTER NB 1 Grey
KÖSTER NB 4000
KÖSTER NB Elastic 1C White
KÖSTER NB Elastic Grey
KÖSTER NB Elastic White
KÖSTER Restoration Slurry

6 Protection of the waterproofing layer

KÖSTER SD Protection and Drainage Sheet

External basement waterproofing with cold self-adhesive waterproofing membranes

1 Joint sealing

KÖSTER BD 70 Flex Tape K 120
KÖSTER Bikuplan® Special Joint Tape

2 Primer

KÖSTER KSK Primer BL
KÖSTER KSK Primer PS
KÖSTER KSK Primer SP

3 Preparing wall/floor junction

KÖSTER NB 1 "Fast"
KÖSTER NB 1 Flex
KÖSTER NB 1 Grey
KÖSTER Restoration Slurry

4 Installing fillets

KÖSTER Bikuplan® KSK Triangular Ribbon
KÖSTER Repair Mortar
KÖSTER Repair Mortar Plus

5 Waterproofing layer

KÖSTER Bikuplan® KSK AW 15
KÖSTER Bikuplan® KSK SY 15

6 Protection of the waterproofing layer

KÖSTER SD Protection and Drainage Sheet

7 Waterproofing membrane ending

KÖSTER BS 1 Bitumen Paste
KÖSTER KBE Liquid Film

External basement waterproofing with curtain injection

1 Pump

KÖSTER Gel Pump

2 Installing the packers

KÖSTER Wedia® Injection Lance

3 Waterproofing layer

KÖSTER KB-Pur® Gel