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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSpecialized Construction ActivitiesBaselWiedemann Reservoirschutz AG
Wiedemann Reservoirschutz AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Wiedemann Reservoirschutz AG is the repair of concrete structures, particularly drinking water reservoirs, as well as the execution of structural investigations and the creation of cost estimates for renovation measures. Additionally, the company offers reinforcement measures with CFRP laminates and industrial floor coatings.

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Products & services

Industry:Specialized Construction Activities
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Wiedemann Reservoirschutz AG

✓ Offered9
Repair of concrete structures
Repair of concrete structures, in particular drinking-water reservoirs; structural inspection, remediation of damaged areas and cracks, surface preparation and coating work.
Renovation of drinking-water reservoirs
Renovation of drinking-water reservoirs from structural inspection through project planning to completion; protective measures, concrete repair, internal coatings and disinfection.
Consulting and project planning
Competent and efficient consulting, structural inspection and complete project planning for renovation measures for reservoirs and other water structures.
Concrete repair and defect remediation
Concrete repair, defect remediation and reprofiling of defective areas in water chambers, reservoirs and pumping stations.
Mineral coatings
Mineral coatings for floor, wall and ceiling surfaces in water chambers and reservoirs, often with microsilica spray mortar or microsilica-modified mortars.
Surface preparation
Surface preparation using HDW blasting or solid-jet blasting as preparation for renovation, coatings and other repair work.
Crack repair and joint remediation
Crack repair, joint remediation and sealing of floor joints in drinking-water tanks and reservoir chambers.
Strengthening measures with CFK laminas
Strengthening measures for concrete structures using CFK laminas as an additional focus alongside reservoir repair.
Repairs of waterworks and pumping stations
Repairs of waterworks, pumping facilities and pumping stations with concrete repair, coatings and refurbishment of chambers and shafts.
Trust & reputation

ranQ Trust Score of Wiedemann Reservoirschutz AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Wiedemann Reservoirschutz AG has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Wiedemann Reservoirschutz AG scores 82.0 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.83.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.70.07%
Wiedemann Reservoirschutz AG scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).83.322%
Wiedemann Reservoirschutz AG scores 8.6 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.8.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Wiedemann Reservoirschutz AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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Location

Aeschengraben 10
4051 Basel

At a glance

Legal form
Corporation
UID
CHE-499.262.999
Founded
2017 · 9 years
Last commercial register change
October 13, 2017
Employees
11 to 20
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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