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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryFinance & InsuranceHolding CompaniesHerisauJud Sierra GmbH
Jud Sierra GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Jud Sierra GmbH sells products and provides technical consultation in the fields of waterproofing for concrete structures and passive fire protection. Offerings include joint tapes, swellable tapes, pipe seals and intumescent fire-protection seals; the company prepares components for installation, performs on-site installation work and delivers training and planning/consultation services.

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Products & services

Industry:Holding Companies
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4.1/5

Jud Sierra GmbH

✓ Offered9
Advisory, sales and installation for waterproofing
Advice during the planning phase and for ongoing projects, sale of waterproofing systems, and installation by specialist professionals; also remediation of leaks in existing properties.
Waterproofing for below-ground concrete
Waterproofing of below-ground concrete as a complete waterproofing system according to the SIA recommendations, including cost-effective solutions for new build and existing structures.
New build: waterproofing concept
Advice during the planning phase or before execution of the reinforced concrete works, developing cost-effective solutions for watertight joints in the below-ground area.
Renovation: subsequent waterproofing
Subsequent waterproofing using injections into the concrete structure or curtain injections between concrete and soil; also negative-side sealing for permanently watertight components.
Welding of joint tapes
Pre-cutting/custom fabrication and welding of joint tapes to measure, from simple welds to complex corner details and combinations of different joint tape types.
Firestopping for cable and pipe penetrations
Sale and training of product systems for firestopping cable and pipe penetrations, including support for the specific application and for the fire protection concept.
Fire protection seals for joints and doors
Intumescent fire protection seals based on graphite, as well as fire protection laminates for fire doors, shaft fronts and switchgear combinations.
Planning / advisory for firestopping
Planning and advisory for cable and pipe penetrations, fire protection or installation shaft concepts, and for selecting approved products.
Fire protection training
Training on firestopping systems and passive fire protection, including explanations of the principles and reference to VKF fire protection guidelines.
Trust & reputation

ranQ Trust Score of Jud Sierra GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Jud Sierra GmbH scores 67.5 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.79.424%
  • 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.52.910%
  • 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%
Jud Sierra GmbH scores 82.0 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.97.712%
  • 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%
Jud Sierra 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%
Jud Sierra GmbH scores 57.1 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 35.57.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Jud Sierra GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 7 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 7 reviews across all connected sources

Sources
GGoogle57
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Kasernenstrasse 88a
9100 Herisau
Opening hours
Mon
07:15 - 12:00, 13:00 - 17:15
Tue
07:15 - 12:00, 13:00 - 17:15
Wed
07:15 - 12:00, 13:00 - 17:15
Thu
07:15 - 12:00, 13:00 - 17:15
Fri
07:15 - 12:00, 13:00 - 17:15
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-245.538.745
Founded
2012 · 14 years
Last commercial register change
April 7, 2022
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.
88.0
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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