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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentPhotovoltaicsBaselSpenglerei Stratmann
Spenglerei Stratmann Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Spenglerei Stratmann is the provision of services in the field of roofing, particularly in the areas of: sheet metal work and sheet metal specialties, roofing (both pitched and flat roofs), terraces and garden plates, sealing and polybau, solar and photovoltaic systems, and sanitary work. The company also offers services in the areas of roof renovation, demolition and disposal of old roofs, as well as the installation of new roofs.

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Offering

Products & services

Industry:Photovoltaics
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4.2/5

Spenglerei Stratmann

6
Solar / Photovoltaics
Solar systems and photovoltaics on or on buildings, consulting on renewable energy and on current solutions in the solar/photovoltaics field.
Waterproofing & Polybau
Roof structures, waterproofing, flat-roof insulation, structural waterproofing with liquid plastic and injections for heat-sensitive components.
Sheet metal work & sheet metal specialties
Sheet metal and roofing work, waterproofing and visual design of roofs and façades; processing of copper, chrome steel, aluminium, titanium-zinc, VMZink, Uginox, Ugitop and lead.
Flat & pitched roof
Construction of flat roofs and pitched roofs, advice on choosing the roof as well as installation of roof coverings for long-lasting, properly executed roofs.
Plumbing
Bathroom conversions, bathroom renovations and bathroom refurbishment; fittings, water pipes, drainage lines as well as tiles and ceramic tiles from a single source.
Terraces & garden slabs
Design of outdoor areas, terrace coverings and garden slabs; advice on sub-surfaces, terrace slabs, artificial turf and sealants.
Trust & reputation

ranQ Trust Score of Spenglerei Stratmann: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of November 2026

Spenglerei Stratmann scores 78.4 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.84.124%
  • 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.65.210%
  • 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.78.08%
Spenglerei Stratmann scores 65.7 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.70.212%
  • 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 Stratmann scores 86.7 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).86.722%
Spenglerei Stratmann scores 74.3 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 35.74.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Spenglerei Stratmann reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 12 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 12 reviews across all connected sources

Sources
GGoogle512
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Vogesenstrasse 135
4056 Basel
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
Sole proprietorship
UID
CHE-153.415.624
Founded
2020 · 6 years
Last commercial register change
February 9, 2023
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • BSBasel
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.
67.0
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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