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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryCrafts & TradesGlazieryLully VdDemenga & fils SA
Demenga & fils SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Demenga & fils SA provides glass and mirror services including interior and exterior glazing, bespoke glass elements such as glass-and-metal staircases, and installation techniques. The company operates a production workshop with automated cutting tables for monolithic and laminated glass, drilling and washing equipment, and offers installation and technical support.

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Products & services

Industry:Glaziery
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4.4/5

Demenga & fils SA

Glazing
Installation on wooden, wood-metal, aluminium, steel and PVC windows; curtain wall systems with posts and transoms, structural glazing, safety glass, insulation, fire protection, renovation and replacement.
Glass fabrication
Cutting, shaping and drilling of glass; UV bonding; polishing; processing of float and laminated glass; fully equipped workshop for fabrication and finishing.
Interior glazing
Showers and bathroom layouts, fixed or sliding doors, glass and metal staircases, decorative glass, handrails, splashbacks and office partitions.
Exterior glazing
Windows, exterior handrails and balustrades, awnings and eaves, floor slabs, anti-noise walls and light wells.
General contracting – Technical office
Project management for construction sites, renovations and fit-outs; technical studies and advice; site measurements and plan preparation.
Fine locksmithing
Spot handrails or handrails held in the lower part, glazing in aluminium, steel and fire-rated options, renovation work and compliance upgrades.
Glass decoration
Design and creation using computer-aided design/DAO, swissatin, color design, colorprint and screen printing.
Frosting and glass engraving
Frosting, engraving, sandblasting and acid work on all glass surfaces.
Glass steps and flooring
Studies and installations in integral GT glass, with slip-resistant surface.
Glass barriers
Studies and installations in laminated glass for glass barriers and glazed protection systems.
Shower partitions
Design, creation and installation of classic or design shower partitions.
All-glass partitions and installations
Doors, service counters and swing, suspended or sliding partitions; made-to-measure all-glass installations.
Trust & reputation

ranQ Trust Score of Demenga & fils SA: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

Demenga & fils SA scores 88.9 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.89.724%
  • 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.81.910%
  • 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%
Demenga & fils SA scores 77.1 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.64.612%
  • 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.82.07%
Demenga & fils SA 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%
Demenga & fils SA scores 13.1 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 35.13.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Demenga & fils SA reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 24 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 24 reviews across all connected sources

Sources
GGoogle524
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Chemin de Préveyres 51
1132 Lully Vd
Opening hours
Mon
08:00 - 12:00, 13:30 - 17:00
Tue
08:00 - 12:00, 13:30 - 17:00
Wed
08:00 - 12:00, 13:30 - 17:00
Thu
08:00 - 12:00, 13:30 - 17:00
Fri
08:00 - 12:00, 13:30 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-361.994.556
Founded
2021 · 5 years
Last commercial register change
March 30, 2021
Employees
21 to 50
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.
100.0
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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