Sewer rehabilitation Zurich - trenchless, durable, documented

Zurich has one of the oldest sewer infrastructures in Switzerland. In the old town, in Aussersihl, Wiedikon and Wipkingen you find lines from 1880 to 1960 - stoneware pipes with offsets, cracks and root ingress from the old tree alleys. In the Lake Zurich municipalities and the Zurich Oberland districts, properties from the 1950s to 1970s are largely no longer in their original state. That building stock needs rehabilitation - but excavation is out of the question for most owners for three reasons: cost, construction time, and the restoration of the surface and the garden.

Greentech Solutions therefore focuses on trenchless processes: inliners for entire line segments, spraylining for long runs with corrosion damage, short liners for point repairs. With decades of proven technology and lifespans of 50 years and more, this is the economic answer to ageing infrastructure - without the classic building chaos around the property.

The principle behind it is simpler than it sounds: the old pipe stays in the ground and gets a new one inside it. A resin-impregnated liner is drawn in via the existing shaft, pressed against the pipe wall and cured in place. What remains is a smooth, seamless pipe inside the old pipe - watertight over the full length, without a single spade cut in your garden or driveway.

Trenchless rehabilitation is not a niche in Zurich. The city of Zurich describes lining in its guidance on the rehabilitation of private drainage systems as a proven procedure that ensures durable, watertight lines. And the cantonal specialist offices confirm that private drain lines must be monitored and maintained just as regularly as the public network. Trenchless rehabilitation therefore uses a method that authorities know, verify and accept - including leak testing after completion.

The economics come mainly from what is avoided: no surface break-up in front of the house, no garden restoration, no weeks of makeshift arrangements on the driveway. Instead of an open construction site over weeks, trenchless rehabilitation typically takes just a few working days, often only one for house connections. What it costs in your case we tell you in writing after the TV inspection - before any rehabilitation, not after.

Pure rehabilitation without a change in cross-section is generally not subject to permit in the canton of Zurich - the measure preserves the existing pipe run. For larger interventions or new installations, the municipality or AWEL (cantonal environment office) is competent. We support communication with the authorities with GSchV-compliant documentation: before and after camera surveys, damage classification, evidence of materials and process, and an acceptance protocol.

In the case of an insured event (typically a backflow water damage in the basement, or root damage with follow-on damage in the property), building and contents insurance often cover part of the rehabilitation cost. We provide all necessary documents - damage report, findings video, quote with process rationale, final protocol - prepared directly for the insurer.