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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding MaintenanceRiazHelfer Bertrand - Entreprise de ramonage
Helfer Bertrand - Entreprise de ramonage Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Bertrand Helfer – Entreprise de ramonage is the provision of ramonage services, including: Periodic cleaning of heating systems (wood, oil, gas) and chimneys; Efficiency control of heating systems; Official combustion tests; Safety inspections of heating systems and rooms; Prevention of accidents and fire damage through regular maintenance and inspections. The company offers these services in a specific area of Switzerland, particularly in the Sarine region and the Lac district.

AI-generated
Offering

Products & services

Industry:Building Maintenance
✓ Offered3
Chimney sweeping
Periodic cleaning of wood, oil and gas heating installations; sweeping of residential fireplaces, bench stoves, molasse hearth stoves and artisanal stoves.
Official combustion checks
Periodic checks of the combustion of oil and gas thermal installations; assessment of combustion quality for boilers and, soon, for solid-fuel installations with water circulation.
Fire prevention related to thermal installations
Preventive interventions through early detection of fire risks, compliance with construction and planning requirements, and orderliness in boiler rooms and technical areas.
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4.0/5

Helfer Bertrand - Entreprise de ramonage

Trust & reputation

ranQ Trust Score of Helfer Bertrand - Entreprise de ramonage: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Helfer Bertrand - Entreprise de ramonage scores 70.0 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.71.224%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.52.910%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.88.08%
Helfer Bertrand - Entreprise de ramonage scores 75.3 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.92.512%
  • 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%
Helfer Bertrand - Entreprise de ramonage scores 85.0 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).85.022%
Helfer Bertrand - Entreprise de ramonage scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Helfer Bertrand - Entreprise de ramonage reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 4.6 out of 5 stars from 7 customer reviews. The data basis is 96%, 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.

Reviews

Aggregated rating

Aggregated rating
4.6
of 5

Aggregated from 7 reviews across all connected sources

Sources
GGoogle4.67
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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Location

Impasse de la Biorda 5
1632 Riaz

At a glance

Legal form
Sole proprietorship
UID
CHE-113.697.830
Founded
2014 · 12 years
Last commercial register change
February 24, 2014
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.67.06%
  • 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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