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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesRoofingMuri B. BernKeller & Schär AG
Keller & Schär AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Keller + Schär AG is the planning, execution, maintenance and repair of roofs, in particular pitched roofs, as well as the provision of roofing and sheet metal services. This also includes comprehensive inspection and maintenance services for roofs, cleaning of gutters, checking of seals and repair of minor damage.

AI-generated
Offering

Products & services

Industry:Roofing
✓ Offered5
Pitched Roof / Facade
Planning, installation and maintenance of pitched roofs and facades with tiles, slate and metal; also for new builds, refurbishments and repairs.
Flat Roof
Planning, execution and maintenance of flat roofs; including refurbishments as well as waterproofing and insulation for residential, commercial and industrial buildings.
Sheet Metal Work
Manufacture of gutters, coverings, connections and cladding made of zinc, copper and aluminium.
Liquid Plastic
Seamless waterproofing for roofs, balconies and terraces; suitable for new builds and refurbishments.
Service and Maintenance
Inspection and maintenance services for roofs; cleaning of gutters, checks of waterproofing and repair of minor damage.
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4.1/5

Keller & Schär AG

Trust & reputation

ranQ Trust Score of Keller & Schär AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Keller & Schär 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.
x
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%
Keller & Schär AG scores 85.5 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.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%
Keller & Schär AG scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
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%
Keller & Schär AG scores 5.7 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 35.5.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Keller & Schär 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

Lückhalde 12
3074 Muri B. Bern

At a glance

Legal form
Corporation
UID
CHE-103.548.660
Founded
1986 · 40 years
Last commercial register change
September 15, 2026
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.
100.0
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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