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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureTimber Construction & CarpentryVillaraboudDumas Frédéric Sàrl
Dumas Frédéric Sàrl Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Dumas Charpente Sàrl is the manufacture and installation of roof trusses (Charpente) as well as wood processing (Menuiserie).

AI-generated
Offering

Products & services

Industry:Timber Construction & Carpentry
✓ Offered4
Timber framing
Traditional timber frames, timber frame structures and bespoke timber roofs; design and construction for single-family homes, garages, agricultural or industrial halls, terrace coverings and pergola roofs.
Roof covering & sheet-metal work
Sloped roofs, underlays, vapour barriers, tiles, powder-coated sheet metal, fibre-cement boards and metal finishes; installation in new build and renovation, coordinating sheet-metal work.
Interior & exterior joinery
Wall cladding, lightweight partitions, wood panelling, floors, interior structuring elements, balconies, terraces and exterior platforms integrated into the timber frame.
Perimeter insulation
Perimeter insulation using a ventilated façade, with thermal insulation, wood fibre, breathable wind protection, secondary subframe and ventilated exterior cladding in wood, tiles or panels.
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4.2/5

Dumas Frédéric Sàrl

Trust & reputation

ranQ Trust Score of Dumas Frédéric Sàrl: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Dumas Frédéric Sàrl scores 73.2 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.78.124%
  • 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.49.510%
  • 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.88.08%
Dumas Frédéric Sàrl 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%
Dumas Frédéric Sàrl scores 85.0 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).85.022%
Dumas Frédéric Sàrl scores 11.7 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 35.11.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Dumas Frédéric Sàrl 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 6 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 6 reviews across all connected sources

Sources
GGoogle56
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Route des Chaffaz 25
1679 Villaraboud
Opening hours
Mon
07:00 - 18:00
Tue
07:00 - 18:00
Wed
07:00 - 18:00
Thu
07:00 - 18:00
Fri
07:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-114.830.416
Founded
2009 · 17 years
Last commercial register change
December 27, 2017
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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