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

About the company

The core activity of Alldach AG includes the planning, execution and renovation of building envelopes, particularly in the areas of: roofing and sealing (pitched roof, flat roof), sheet metal work (metal processing, gutters, downspouts), timber construction (complete timber construction, timber frame construction), facade work and mobile phone mast construction. The company also offers comprehensive services in the areas of new construction, renovation and repair.

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Products & services

Industry:Specialized Construction Activities
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3.7/5

ALLDACH AG

✓ Offered6
Pitched and flat roofing
Pitched roofs and flat roofs, including re-roofing, waterproofing, roof windows, roof access hatches, solar preparations, maintenance, thermal insulation and repair work.
Facade construction
Ventilated façades with substructures and cladding made of natural slate, fibre-cement boards or metal, including waterproofing work, thermal insulation, window sills, canopies and maintenance.
Sheet metal work
Building sheet metal work with gutters, downpipes, valleys, sheet metal roofing, sheet metal cladding, dormers, wind-board cladding, custom-made items and lightning protection; plus decorative sheet metal work with water spouts, ornamental elements and weather vanes.
Timber construction
Timber construction and timber-frame construction, erection, conversion of attic floors, installing lukarnes and dormers, interior fit-out, fire protection, terrace grilles and maintenance.
Mobile radio network construction
Structural measures at radio antenna sites, including access securing, radiation protection, metal works, fire-protected rooms, ventilation systems, lightning protection systems and anti-vandal protection.
Energy-efficient renovations
Energy-efficient renovations of roof and façade, roof insulation, thermal insulation of exterior walls and basement ceilings, insulation of the top-floor ceilings, replacement of windows and doors, solar, U-value calculations and subsidy applications.
Trust & reputation

ranQ Trust Score of ALLDACH AG: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 96% · As of October 2026

ALLDACH AG scores 49.8 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.68.224%
  • 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.17.610%
  • 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.35.08%
ALLDACH AG scores 72.8 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.70.212%
  • 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%
ALLDACH AG 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%
ALLDACH AG scores 5.4 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 35.5.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

ALLDACH AG reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». The rating draws, among other things, on 5.0 out of 5 stars from 1 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 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Weingartenstrasse 10
8820 Wädenswil
Opening hours
Mon
07:00 - 12:00, 13:00 - 19:00
Tue
07:00 - 12:00, 13:00 - 19:00
Wed
07:00 - 12:00, 13:00 - 19:00
Thu
07:00 - 12:00, 13:00 - 19:00
Fri
07:00 - 12:00, 13:00 - 19:00
Sat
07:00 - 12:00, 13:00 - 19:00
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-277.624.076
Founded
2020 · 6 years
Last commercial register change
November 22, 2023
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.
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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