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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSpecialized Construction ActivitiesLuganoDONADA SA
DONADA SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Donada SA is the provision of services and solutions in the fields of sheet metal work, waterproofing, carpentry and resin applications. Specifically, this includes: Sheet metal work: manufacturing and installation of metal roofing, facade cladding and lightning protection systems; Waterproofing: carrying out sealing work for roofs, terraces and underground structures using modern materials such as bitumen sheets and insulation systems; Carpentry: manufacturing and installation of wooden and metal structures, including roofing and facade cladding; Resin applications: applying resins for sealing terraces and balconies, including visible and walkable surfaces, as well as repair work. The company also offers consulting and planning services for these areas and performs visual inspections and maintenance work.

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Products & services

Industry:Specialized Construction Activities
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DONADA SA

✓ Offered5
Sheet metal work
Working of copper sheet metal, stainless steel, aluminium and titanium zinc; flashings, gutters, downpipes, façade cladding, insulated roofing, lightning protection systems, repairs and maintenance.
Waterproofing
Waterproofing for flat roofs, terraces and underground structures; application of bituminous sheets and synthetic materials, thermal insulation, vapour barriers, repairs to membranes and top finishes.
Timber and metal construction
Construction of timber and metal structures for pitched roofs; roof coverings with tiles and terracotta roof tiles, installation of skylights and dormers, maintenance, cleaning and restoration of roofs.
Resin application
Waterproofing and resin finishes for terraces and balconies; PMMA, polyurethane and epoxy resins, walkable surfaces, connections with bituminous membranes and localized repairs.
Technical consulting and site inspections
Technical consulting, free site inspections, preparation of tailored offers, support with detailed design and completion of federal documents and forms for building applications.
Trust & reputation

ranQ Trust Score of DONADA SA: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

DONADA SA scores 61.2 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.67.224%
  • 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.55.910%
  • 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.50.08%
DONADA SA scores 92.3 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.82.07%
DONADA 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%
DONADA SA scores 34.3 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 35.34.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

DONADA SA reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.4 out of 5 stars from 8 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
4.4
of 5

Aggregated from 8 reviews across all connected sources

Sources
GGoogle4.48
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Via Cantonale 13
6900 Lugano
Opening hours
Mon
07:00 - 12:00, 13:00 - 18:00
Tue
07:00 - 12:00, 13:00 - 18:00
Wed
07:00 - 12:00, 13:00 - 18:00
Thu
07:00 - 12:00, 13:00 - 18:00
Fri
07:00 - 12:00, 13:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-100.080.927
Founded
1998 · 28 years
Last commercial register change
December 30, 2024
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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