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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesRoofingGunzgenRoth-Dach GmbH
Roth-Dach GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of ROTH DACH GmbH encompasses the planning, execution, and maintenance of roofing work, particularly: flat roofing (new construction, renovation, maintenance), sheet metal work (metal construction, gutters, downspouts), lightning protection systems, green roofs, roof maintenance and repair, and renovation of roofs, especially with Prefa roof systems. The company also offers consulting and estimating services for these works and specializes in the use of high-quality materials, such as Prefa aluminum products.

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Products & services

Industry:RoofingSheet Metal Work
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4.1/5

Roth-Dach GmbH

✓ Offered6
Flat roof
Flat roof refurbishment, maintenance work and new build; roof build-up from one source, bituminous waterproofing, terrace wearing layers with slabs, granite, cement boards or wooden grates.
Roof sheet metal work
Sheet metal work for roofs, gutters and downpipes; cladding for dormers, double lock standing seam and lapped roofing systems, work in copper, chromesteel, copper titanium zinc and Uginox.
Lightning protection
Lightning protection systems for houses; clarification of the required measures with the cantonal insurance office and professional implementation of the requested guidelines.
PREFA roof
Roofs, façades and complete aluminium systems; covering with lightweight aluminium sheets in various shapes and colours, suitable for new build and renovation.
Roof greening
Extensive roof greening and protective layers; substrate layer with wet or dry seeding, gravel roof and other planting options for protection and use of the roof.
Roof maintenance
Annual roof inspections and cleaning under the maintenance contract; inspection of older roofs, cleaning of drainage systems, prevention of plant growth and early detection of damage points.
Trust & reputation

ranQ Trust Score of Roth-Dach GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Roth-Dach GmbH has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Roth-Dach GmbH scores 86.7 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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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%
Roth-Dach GmbH scores 83.3 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).83.322%
Roth-Dach GmbH scores 17.1 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Roth-Dach GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, 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.

Knowledge

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Location

Mittelgäustrasse 77
4617 Gunzgen

At a glance

Legal form
Limited Liability Company
UID
CHE-104.116.180
Founded
1998 · 28 years
Last commercial register change
November 6, 2014
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.
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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