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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesMetal ConstructionLömmenschwilZS Alu-Zargen AG
ZS Alu-Zargen AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of ZS Alu-Zargen AG is the manufacture and assembly of aluminum window frames, claddings, window sills and glazing products, particularly in small and very small series as well as in innovative special custom-made products.

AI-generated
Offering

Products & services

Industry:Metal Construction
✓ Offered7
Aluminium frames
Aluminium frames for windows, doors and façade terminations for new builds, renovations and special solutions; around 35 frame types, made to measure and powder-coated.
Window frames
Window frames for different types of façade, with versions for modern new builds, renovations, compact façades and façades with a folding shutter or roller shutter opening.
Cladding and covers
Cladding and covers in any size for façade terminations, made to measure and colour-coated in RAL or NCS.
Window sills
Window sills in any size, matched to the aluminium frames and designed for different structural and façade situations.
Profiled rooflets
Profiled rooflets as the top façade termination, also possible in two colours and suitable in many cases for site-specific visual requirements.
Special made-to-measure
Special made-to-measure work and custom profiles for frame solutions that match technically and visually, individually tailored to the existing situation and project requirements.
Personal consultation
Personal, competent and solution-oriented advice on aluminium frames, product selection and the right façade solution for construction and renovation projects.
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4.0/5

ZS Alu-Zargen AG

Trust & reputation

ranQ Trust Score of ZS Alu-Zargen AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

ZS Alu-Zargen AG scores 65.9 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.75.024%
  • 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.40.910%
  • 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.70.08%
ZS Alu-Zargen AG scores 82.3 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%
ZS Alu-Zargen AG scores 85.0 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).85.022%
ZS Alu-Zargen AG scores 6.3 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 35.6.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

ZS Alu-Zargen AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 4 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 4 reviews across all connected sources

Sources
GGoogle54
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Alte Konstanzerstrasse 7
9308 Lömmenschwil
Opening hours
Mon
07:00 - 17:00
Tue
07:00 - 17:00
Wed
07:00 - 17:00
Thu
07:00 - 17:00
Fri
07:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-165.209.132
Founded
2014 · 12 years
Last commercial register change
January 22, 2025
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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