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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureInsulationLangenthalPortner Abdichtungen
Portner Abdichtungen Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company operates in the field of sealing and offers customized and innovative sealing solutions.

AI-generated
Presence

Service area

Offering

Products & services

Industry:Insulation
✓ Offered4
Waterproofing
Bitumen waterproofing, liquid plastic waterproofing and renovations for flat roofs, below-ground areas, terraces, balconies, underground car parks, plinths, joints and carports.
Flat roof waterproofing
Flat roof waterproofing for new builds, conversions and renovations, including vapour barriers, thermal insulation, maintenance, repairs, investigations (surveys), re-greening and fall protection.
Below-ground waterproofing
Below-ground waterproofing for perimeter zones, basements, joints, plinths, underground car parks, ventilation systems, air-raid shelters basements and bunkers against water and moisture ingress.
Roof greening
Greening of flat roofs with extensive and intensive roof greening systems, including substrate, seed, sedum, herbs, grasses, perennials, shrubs and roof gardens.
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4.0/5

Portner Abdichtungen

Trust & reputation

ranQ Trust Score of Portner Abdichtungen: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of November 2026

Portner Abdichtungen scores 79.3 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.84.824%
  • 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.67.110%
  • 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.78.08%
Portner Abdichtungen scores 57.0 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.50.012%
  • 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%
Portner Abdichtungen scores 86.7 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).86.722%
Portner Abdichtungen scores 13.4 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 35.13.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Portner Abdichtungen reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 13 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 13 reviews across all connected sources

Sources
GGoogle513
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Blumenstrasse 37
4900 Langenthal
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:30
Tue
07:00 - 12:00, 13:00 - 17:30
Wed
07:00 - 12:00, 13:00 - 17:30
Thu
07:00 - 12:00, 13:00 - 17:30
Fri
07:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-266.982.241
Founded
2023 · 3 years
Last commercial register change
August 17, 2023
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • BELangenthal
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.
67.0
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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