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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesSheet Metal WorkWürenlingenSpenglerei Rolf Merki GmbH
Spenglerei Rolf Merki GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Spenglerei Rolf Merki GmbH is the provision of services in the field of sheet metal work and roofing, including: sheet metal work (e.g. metal work, individual solutions), flat roof work (e.g. bituminous, plastic or green roofs), pitched roof work (e.g. tile roofing, slate eternit, metal roofing or prefabricated roofing), lightning protection systems, and facade cladding (e.g. protection against moisture and wind, thermal insulation, energy savings). The company thus offers a wide range of services in the field of building envelopes and technology.

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Products & services

Industry:Sheet Metal Work
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4.3/5

Spenglerei Rolf Merki GmbH

5
Sheet metal work
Building sheet metal work such as gutters and downpipes, cladding for chimneys and dormers, gable and hip claddings, window sills, sheet metal coverings, standing-seam roofs, snow guard installations, as well as repairs and maintenance work.
Flat roof
Flat roofs and waterproofing in bituminous or plastic versions, with or without green roofing, as well as flat roof greening, roof impregnation, liquid plastic waterproofing, and maintenance and repair work.
Pitched roof
Roofing for pitched roofs with tiles, slate roofs, aluminium roofs and Prefa; including installation of roof windows, roof cleaning and maintenance work, as well as installation of fall protection.
Lightning protection
Lightning protection systems for buildings according to the regulations of the cantonal building insurance, consisting of a lightning interception system, a down-conductor system and an earthing system.
Façade cladding
Façade coverings to protect against rain, snow, wind, heat and cold, with thermal insulation; carried out using sheet metal, profiled sheet metal, Prefa façade elements and fibre-cement panels.
Trust & reputation

ranQ Trust Score of Spenglerei Rolf Merki GmbH: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Spenglerei Rolf Merki GmbH scores 85.0 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.86.024%
  • 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.100.08%
Spenglerei Rolf Merki GmbH scores 83.0 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.55.07%
Spenglerei Rolf Merki GmbH 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%
Spenglerei Rolf Merki GmbH scores 4.3 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 35.4.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Spenglerei Rolf Merki GmbH reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 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 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 15 reviews across all connected sources

Sources
GGoogle515
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Wiesenstrasse 12
5303 Würenlingen

At a glance

Legal form
Limited Liability Company
UID
CHE-108.200.885
Founded
1998 · 28 years
Last commercial register change
September 20, 2018
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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