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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSealing & InsulationBaselWalter Siefert AG, Asphaltgeschäft
WS
Verified· 1 sourceTrust ScoreNo score yet

Walter Siefert AG, Asphaltgeschäft

Summary

About the company

Manufacture, creation and execution of mastic asphalt, mastic asphalt coatings, flat roof coatings, sealings, insulations, sheet metal works, system sealings, wood plastering, masonry works, plate coatings, protective coatings, extensive and intensive green roofs, etc. of all kinds, using external or own products. The company's purpose is to carry out works with sealing, insulating and protective effects against moisture, dampness, heat, cold and mechanical damage, as well as all direct and indirect works related to the aforementioned. It uses all means available at the time of execution.

Commercial register, canton of BS·As of April 29, 2016View on Zefix
Trust & reputation

ranQ Trust Score of Walter Siefert AG, Asphaltgeschäft

Trust Score

No score yet

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A published score requires a data basis of at least 50% and data from at least two criteria groups other than identity. Missing evidence: Review quality, Review volume, Review recency, Website authority, Media authority

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Data basis 50% · As of October 2026

Walter Siefert AG, Asphaltgeschäft 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%
Walter Siefert AG, Asphaltgeschäft scores 85.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • 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.55.07%
Walter Siefert AG, Asphaltgeschäft scores 58.3 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).58.322%
Walter Siefert AG, Asphaltgeschäft has no value in the Visibility area of the ranQ Trust Score because no data is available. The area carries 8% 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
  • Website authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%

The data basis is 50%, below the threshold at which ranQ publishes a score. Evidence is missing for: Review quality, Review volume, Review recency, Website authority, Media authority. As of October 2026.

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

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Location

Auf dem Wolf 3
4052 Basel

At a glance

Legal form
Corporation
UID
CHE-107.306.713
Founded
1956 · 70 years
Last commercial register change
April 29, 2016
Employees
1 to 10
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.100.06%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%

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