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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesRoofingZurichAEZ AG
AEZ AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of AEZ AG is the provision of services in the field of building sealing and sheet metal work, particularly in the areas of: flat roof sealing, sheet metal work and lightning protection, roof service and repairs, fall protection, leak detection and monitoring, and solar panel cleaning. The company offers consulting, planning and quotation services for these services and positions itself as a competent and reliable partner from planning to execution.

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Offering

Products & services

Industry:RoofingSheet Metal Work
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4.3/5

AEZ AG

✓ Offered7
Flat roof / flat roof waterproofing
Planning and execution of flat roofs and flat roof waterproofing for new builds, extensions and renovations; including thermal insulation, green roofs, ballasted and walkable/driveable designs.
Sheet metal work and lightning protection
Installation and replacement of lightning protection systems, gutters, downpipes, chimney claddings, metal roofs, parapet cappings, trims, sheet-metal junctions and roof upstands.
Roof service and repairs
Roof inspections, roof cleaning, maintenance contracts, semi-annual or annual inspections, as well as rectification of damage to protective and wearing layers, roofing membrane, connections, gutters and solar installations.
Consulting / planning / cost estimation
Consulting, planning and cost estimation for new builds, extensions and renovations; preparation of bills of quantities for building envelopes according to current SIA regulations and plan documentation.
Fall protection systems
Planning and installation of fall protection systems on roofs for work safety during maintenance and repair work; including anchor points and professional maintenance.
Leak detection and monitoring
Leak detection and tightness testing of roofs using smoke gas procedures as well as monitoring systems for rapid detection and monitoring of leaks on flat roofs, terraces, garages and parking decks.
Solar panel cleaning
Professional cleaning of solar installations to maintain and maximize efficiency; with environmentally friendly cleaning agents and expert execution.
Trust & reputation

ranQ Trust Score of AEZ AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

AEZ AG scores 77.8 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.77.924%
  • 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.100.010%
  • 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.50.08%
AEZ AG scores 89.3 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.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.70.07%
AEZ 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%
AEZ AG scores 40.0 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 35.40.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

AEZ AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.6 out of 5 stars from 62 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 62 reviews across all connected sources

Sources
GGoogle4.662
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Hohlstrasse 409
8048 Zurich
Opening hours
Mon
08:00 - 12:00, 13:00 - 17:00
Tue
08:00 - 12:00, 13:00 - 17:00
Wed
08:00 - 12:00, 13:00 - 17:00
Thu
08:00 - 12:00, 13:00 - 17:00
Fri
08:00 - 12:00, 13:00 - 16:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.898.740
Founded
1995 · 31 years
Last commercial register change
October 10, 2025
Employees
11 to 20
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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