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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesRoofingGrellingenSiegrist, Spenglerei - Flachdach
Siegrist, Spenglerei - Flachdach Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of SIEGRIST Spenglerei & Bedachungen is to provide services and solutions in the field of roofing and facade work, including sheet metal work, roofing, facades, dormer windows, Prefa roofs, lightning protection systems, bird protection, sealing and coatings.

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Products & services

Industry:RoofingSheet Metal Work
✓ Offered
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4.1/5

Siegrist, Spenglerei - Flachdach

11
Flat Roof Services
Flat roofs for new builds and refurbishments, including waterproofing with bitumen, EPDM, PVC or liquid plastic, plus green roof systems and maintenance.
Pitched Roof Services
Pitched roofs for new construction and renovation, including roof covering, cladding, drainage, snow guards and work on tile, slate, metal and concrete roofs.
Sheet Metal Work
Sheet metal work on roofs and facades, including gutters, downpipes, chimney flashings, cladding, covers, custom fabrications, repairs and refurbishments.
Facade Cladding
Facade cladding in zinc, copper, aluminium or stainless steel, including custom design, refurbishment, modernisation and added thermal insulation.
Dormer Construction
Dormers for more living space and daylight, including planning, construction, cladding, refurbishment, modernisation and adaptation to different roof types.
Roof Window Installation
Roof windows for pitched and flat roofs, including installation, replacement, refurbishment, maintenance, repair and accessories such as sun protection and electric controls.
Lightning Protection Systems
Lightning protection systems with planning, installation, refurbishment, grounding, maintenance and inspection for pitched and flat roofs, plus reports for insurers.
Pigeon Control Systems
Pigeon control systems for roofs, facades, window sills and balconies, including spikes, nets, wire systems, cleaning, refurbishment and maintenance.
Liquid Plastic Waterproofing
Waterproofing of flat roofs, balconies and terraces with liquid plastic, including refurbishment, repairs and special sealing at joints and penetrations.
Terrace and Balcony Coatings
Terrace and balcony coatings with Triflex ProFloor, delivering seamless, waterproof and slip-resistant surfaces plus refurbishment, design and maintenance.
PREFA Roofs
PREFA aluminium roofs for new builds and refurbishments, including planning, installation, varied shapes and colours, accessories, gutters, snow guards and drainage.
Trust & reputation

ranQ Trust Score of Siegrist, Spenglerei - Flachdach: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Siegrist, Spenglerei - Flachdach scores 74.2 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.72.124%
  • 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.58.610%
  • 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.100.08%
Siegrist, Spenglerei - Flachdach scores 78.5 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%
Siegrist, Spenglerei - Flachdach 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%
Siegrist, Spenglerei - Flachdach scores 1.4 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 35.1.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Siegrist, Spenglerei - Flachdach reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.6 out of 5 stars from 9 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 9 reviews across all connected sources

Sources
GGoogle4.69
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Industrie Büttenen 9
4203 Grellingen
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-108.673.692
Founded
1996 · 30 years
Last commercial register change
June 21, 2017
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.67.06%
  • 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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