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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSite PreparationZofingenKernbohr Express Service Koch GmbH
Kernbohr Express Service Koch GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Kernbohr Express Koch includes the execution of specialized construction services, in particular: Core drilling: precise drilling for the installation of pipes, house connections, cables or for chimney openings, waterless and dust-free. Milling work: demolition of walls, ceilings, floors, creation of precise openings for window, door or staircase installation or for simple separation cuts. Fire compartmentalization: measures to prevent the spread of fire. CFRP structural reinforcement: reinforcement of structures with carbon fiber reinforced polymers (CFRP). Special works: other specialized construction services, such as grinding and cutting.

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Products & services

Industry:Site Preparation
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4.2/5

Kernbohr Express Service Koch GmbH

✓ Offered5
Core drilling
Core drilling in dry or wet method for wall and ceiling openings, pipes, building service connections, cables, flue openings and test cores.
Milling work
Milling work for dismantling walls, ceilings and floors, as well as precise openings for windows, doors, staircases, lift installations and separation cuts.
Firestopping
Firestopping according to VKF with rigid and flexible firestopping for cables, ventilation systems and vertical risers to limit the spread of fire.
CFK structural reinforcements
CFK bonded reinforcements and carbon fibre laminates for strengthening concrete, masonry and timber components in conversions, increased loads and changes of use.
Special work
Special work for gutters, drip edges and drip channels, kerbstones, concrete presses, load transports with a stair vehicle and floor grinding.
Trust & reputation

ranQ Trust Score of Kernbohr Express Service Koch GmbH: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

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Data basis 96% · As of October 2026

Kernbohr Express Service Koch GmbH scores 76.3 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.74.224%
  • 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.72.110%
  • 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.88.08%
Kernbohr Express Service Koch GmbH 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%
Kernbohr Express Service Koch GmbH 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%
Kernbohr Express Service Koch GmbH scores 17.1 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 35.17.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Kernbohr Express Service Koch GmbH reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.6 out of 5 stars from 16 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
4.6
of 5

Aggregated from 16 reviews across all connected sources

Sources
GGoogle4.616
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Riedtalstrasse 22
4800 Zofingen
Opening hours
Mon
07:30 - 12:00, 13:00 - 17:00
Tue
07:30 - 12:00, 13:00 - 17:00
Wed
07:30 - 12:00, 13:00 - 17:00
Thu
07:30 - 12:00, 13:00 - 17:00
Fri
07:30 - 12:00, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-108.628.295
Founded
1998 · 28 years
Last commercial register change
September 28, 2020
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.88.06%
  • 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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