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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsAmdenThoma Dach Spengler Fassade Solar AG
Thoma Dach Spengler Fassade Solar AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of Thoma Dach Spengler Fassade Solar AG is the planning, delivery and installation of various works in the field of building envelopes, including: pitched roofs, flat roofs, facades, sheet metal work, lightning protection systems and photovoltaics (PV solar systems). The company thus offers a comprehensive range of services in the field of building envelopes.

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Products & services

Industry:Solar & Photovoltaics
✓ Offered7
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Thoma Dach Spengler Fassade Solar AG

Photovoltaic systems
Photovoltaic systems for converting sunlight into electrical power, including consulting, planning, installation and grid feed-in or direct use of the generated electricity.
Pitched roofs
Pitched roofs with thermal insulation and a coordinated layered build-up, built as lasting protection against weather, heat, cold, rain, snow and storms.
Flat roofs
Flat roofs in cold-roof or warm-roof construction, including gravelled, paved or green usable areas and long-lasting protection against weather exposure.
Facades
Facades with ventilated cavity and thermal insulation, made with fibre cement, natural stone, timber, glass, metal or other cladding.
Sheet metal work
Sheet metal work in zinc, copper, aluminium and stainless steel, from roof drainage to connections and cladding, up to metal structures for roof and facade.
Lightning protection
Lightning protection systems with external and internal lightning protection, including air-termination devices, down-conductor system, earthing system and surge protection.
Liquid plastic waterproofing
Waterproofing with PUR liquid plastics for balconies, terraces, walkways, outdoor staircases and flat-roof connections, seamless and watertight, walkable and permanently load-bearing.
Trust & reputation

ranQ Trust Score of Thoma Dach Spengler Fassade Solar AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 100% · As of October 2026

Thoma Dach Spengler Fassade Solar AG scores 72.8 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.76.724%
  • 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.45.610%
  • 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.95.08%
Thoma Dach Spengler Fassade Solar AG scores 84.8 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.89.612%
  • 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%
Thoma Dach Spengler Fassade Solar AG scores 86.7 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
Thoma Dach Spengler Fassade Solar AG scores 8.6 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 35.17.14%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

Thoma Dach Spengler Fassade Solar AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 5 customer reviews. 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 5 reviews across all connected sources

Sources
GGoogle55
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

May 6, 2025Media
Aufträge Sonnenbüel-Erweiterung | Kaltbrunn
linth24.ch

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Location

Hofstettenstrasse 10
8873 Amden
Opening hours
Mon
07:00 - 20:00
Tue
07:00 - 20:00
Wed
07:00 - 20:00
Thu
07:00 - 20:00
Fri
07:00 - 20:00
Sat
08:00 - 16:00
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-410.819.914
Founded
2015 · 11 years
Last commercial register change
April 15, 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.100.06%
  • 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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