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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryReal EstateCleaning companyOberdiessbachKaminfeger Joost AG
Kaminfeger Joost AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Kaminfeger Joost AG cleans, inspects and maintains heating and combustion systems. Its services include combustion inspections and emissions measurements, fire protection, energy advice, and cleaning and inspection of solar panels.

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Service area

Offering

Products & services

Industry:Cleaning company
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4.2/5

Kaminfeger Joost AG

✓ Offered5
Chimney sweeping work
Boiler cleaning, inspection and cleaning of heating and flue gas systems, cleaning of oil, gas and wood-fired units, as well as advice on cleaning, refurbishment and energy-saving measures.
Combustion system inspection
Recurring inspection and measurement of combustion systems every 2 or 4 years, advice for optimisations, refurbishment and new installations, and assessment of emission values.
Fire protection
Advisory and inspection services in fire protection before and during construction projects, assessment of construction projects, issuing fire-safety requirements, inspection of concepts and measures, as well as structural and site acceptances.
Optical inspections
Inspections with an inspection camera to locate damage in chimneys, pipework, ventilation pipes and shafts; digital video and still-image analysis with measurement and distance information.
Energy consulting
Advice on heating systems and fire protection measures, especially for renovations, optimisations or new installations; personal consultation also on site.
Trust & reputation

ranQ Trust Score of Kaminfeger Joost AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of November 2026

Kaminfeger Joost AG scores 75.6 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.77.024%
  • 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.70.510%
  • 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.78.08%
Kaminfeger Joost AG scores 80.4 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.79.212%
  • 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%
Kaminfeger Joost AG scores 86.7 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).86.722%
Kaminfeger Joost AG scores 28.6 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 35.28.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Kaminfeger Joost AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.7 out of 5 stars from 15 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

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

Reviews

Aggregated rating

Aggregated rating
4.7
of 5

Aggregated from 15 reviews across all connected sources

Sources
GGoogle4.715
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Krankenhausstrasse 8
3672 Oberdiessbach
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:00
Tue
07:00 - 12:00, 13:00 - 17:00
Wed
07:00 - 12:00, 13:00 - 17:00
Thu
07:00 - 12:00, 13:00 - 17:00
Fri
07:00 - 12:00, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-428.530.577
Founded
2018 · 8 years
Last commercial register change
January 18, 2018
Employees
11 to 20

Active in 1 of 26 cantons

  • BEBern
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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