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Sewer re­fur­bish­ment

Large sewer lines with diameters upwards of around 800/1200 mm can be manually refurbished by repairing the interior, specifically the invert. Gruner Böhringer AG has handled the design and implementation of such projects for the Canton of Basel-Stadt Public Works Department since 2005.
The damaged invert is first stripped by ultra-high-pressure water jetting and the waste material removed from the sewer. A suitable lining material, e.g. ceramic tiling, is then precision-laid to gentle falls in a special mortar bed. Tensile tests are performed to verify adequate adhesion to the existing concrete. Sewage flows are diverted for the duration of works.


Gruner Böhringer AG
Mühlegasse 10
4104 Oberwil
T +41 61 406 13 13
F +41 61 406 13 14
Contact Person
Roger Schaub
T +41 61 406 13 05
Roger Schaub Gruner AG