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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesRoofingSt. Gallenmerz+egger ag
merz+egger ag Logo
Verified· 3 sourcesTrust Score
Summary

About the company

merz+egger ag is a roofing and building-envelope company providing services for roofs, façades, roof windows, solar installations and ongoing maintenance. Offerings include roof inspections and renovations, photovoltaic systems, fall‑protection solutions and emergency/maintenance services.

AI-generated
Offering

Products & services

Industry:Roofing
✓ Offered11
Roof maintenance
Roof maintenance for pitched and flat roofs, including inspections, cleaning, minor repairs and a maintenance agreement to extend service life.
Roof inspection
Roof inspection with annual assessment, drone flight, checklist, gutter cleaning, replacement of leaky roofing materials and minor immediate repairs.
Roof renovation
Renovation of pitched roofs with old roofing covering material, damage or insufficient thermal insulation, on request combined with in-roof photovoltaics.
Pitched roof
Pitched roof solutions for new builds, renovation and maintenance, including execution around the roof and suitable insulation or roof windows.
Flat roof
Flat roof solutions for new builds, renovation and maintenance of the building envelope, matched to the roof build-up and servicing requirements.
Facade renovation
Facade renovation, refurbishment and repair of damage on facades, with variants such as DKTN, porcelain stoneware, natural slate, fibre cement or shingles.
Facade insulation
Facade insulation to reduce heating costs, lower CO2 emissions and improve living comfort and property value.
Roof insulation
Roof insulation to improve energy efficiency and retain warmth in winter, as well as protect against heat in summer.
Roof windows
Installation of roof windows, retrofitting, service and repair, including VELUX solutions, sun protection, insect screens and smart-home connectivity.
Solar systems
Solar systems on the roof or on the facade, including on-roof, in-roof and solar facade solutions, as well as consulting and implementation with partner companies.
Fall protection
Fall protection for work on roofs and the building envelope, developed, planned and implemented together with partner companies.
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4.4/5

merz+egger ag

Trust & reputation

ranQ Trust Score of merz+egger ag: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

merz+egger ag scores 81.1 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.75.324%
  • 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.79.710%
  • 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.100.08%
merz+egger ag scores 84.7 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.83.012%
  • 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%
merz+egger 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%
merz+egger ag scores 42.9 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 35.42.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

merz+egger ag reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.6 out of 5 stars from 22 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 22 reviews across all connected sources

Sources
GGoogle4.622
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Kreuzbühlstrasse 42
9015 St. Gallen
Opening hours
Mon
07:30 - 12:00, 13:15 - 17:00
Tue
07:30 - 12:00, 13:15 - 17:00
Wed
07:30 - 12:00, 13:15 - 17:00
Thu
07:30 - 12:00, 13:15 - 17:00
Fri
07:30 - 12:00, 13:15 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-395.401.008
Founded
2017 · 9 years
Last commercial register change
July 1, 2026
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.95.03%
    • Full methodology

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