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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesSpecialized Construction InstallationsSiebnenZ-Isolierungen GmbH
Z-Isolierungen GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Z-Isolierungen GmbH encompasses the planning, design and execution of various technical services in the field of building technology, including: thermal, cold and sound insulation, fire protection (concepts, fire-stopping systems), ventilation and air conditioning systems, sanitary and heating installations, sheet metal work, sound insulation, project management, and energy and sustainability solutions. The company thus provides comprehensive solutions for the technical equipment and protection of buildings.

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Offering

Products & services

Industry:Specialized Construction Installations
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3.7/5

Z-Isolierungen GmbH

✓ Offered8
Fire protection
Fire protection concepts, analysis of building features and use, division into fire compartments, and fire-resistant and smoke-tight sealing of service openings.
Climate and ventilation installations
Ventilation systems and thermal insulation to prevent heat loss, cold radiation and condensate; as well as cooling solutions for a comfortable indoor climate and support during the planning and approval process.
Plumbing installations
Plumbing work in bathroom and renovation environments, with precise execution of the necessary tasks in typical conversion projects.
Heating installations
Heating installations focused on reliable heat distribution, energy efficiency and low environmental impact.
Sound insulation
Sound insulation solutions against typical noise sources such as loud drain pipes and sound transmission from the WC to the floor and walls.
Sheet metal works
Sheet metal cladding and sheet metal works for flat and pitched roofs, including copper, zinc or tinned chrome steel.
Consulting
Consulting for projects with a specialist team, needs analysis, and information on the work, materials and systems used.
Sustainability consulting
Advice on sustainable products, resource-saving approaches, low energy consumption and cost-effective solutions.
Trust & reputation

ranQ Trust Score of Z-Isolierungen GmbH: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 96% · As of October 2026

Z-Isolierungen GmbH scores 56.5 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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.68.224%
  • 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.17.610%
  • 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.70.08%
Z-Isolierungen GmbH scores 67.8 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.64.612%
  • 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%
Z-Isolierungen GmbH 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%
Z-Isolierungen GmbH scores 0.9 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 35.0.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Z-Isolierungen GmbH reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». The rating draws, among other things, on 5.0 out of 5 stars from 1 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
5
of 5

Aggregated from 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Sonnmattstrasse 1
8854 Siebnen
Opening hours
Mon
07:00 - 18:00
Tue
07:00 - 18:00
Wed
07:00 - 18:00
Thu
07:00 - 18:00
Fri
07:00 - 18:00
Sat
08:00 - 12:00
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-140.414.905
Founded
2021 · 5 years
Last commercial register change
November 9, 2023
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.
88.0
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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