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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesRoofingDegersheimgiger + forrer gmbh
giger + forrer gmbh Logo
Verified· 3 sourcesTrust Score
Summary

About the company

giger + forrer gmbh is a roofing company providing construction and maintenance work for building envelopes, including pitched and flat roofs, roof windows, metalwork, façades and photovoltaic systems. Services also include solar-system maintenance, green-roof care, VELUX service, energy consulting, snow clearing and fire-protection measures.

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Products & services

Industry:Roofing
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4.3/5

giger + forrer gmbh

✓ Offered
12
Pitched roofs
Pitched roofs with coverings made of clay tiles, natural slate, fibre-cement, sheet metal, porcelain stoneware slabs and photovoltaic panels; including attic conversion, thermal insulation, maintenance and roof windows.
Flat roofs
Bituminous flat roofs with a multi-layer build-up, liquid plastic for junctions and details, thermal insulation, green roofs, terraces, solar installations and maintenance.
Roof windows
VELUX living-room roof windows, including standard windows, window combinations, automatic INTEGRA roof windows, Sun Tunnel, installation products and roof window service.
Sheet metal work
Sheet metal work and corresponding services via partner companies for roof and building envelope connections.
Façade work
Ventilated façades with cladding made of porcelain stoneware, natural slate, wooden shingles and other proven materials; including substructure and refurbishment.
Solar energy
Solar systems for pitched roofs, flat roofs and façades; integrated solar systems, roof-mounted systems, solar thermal and photovoltaics for power and domestic hot-water production.
Basement and screed insulation
Insulation of basement ceilings and screed floors, moisture protection and conversion of basement and screed spaces into usable living or hobby rooms.
Maintenance
Roof inspections, cleaning, maintenance of the solar installation, care of the green roof, VELUX service and repairs for marten damage.
Energy consulting
Energy consulting to identify optimisation potential in the building, with measures to increase energy efficiency and improve living comfort.
Snow and ice removal
Snow removal and ice removal on roofs to relieve the structure and reduce roof avalanches and ice hazards.
Removal of wasp and bee nests
Professional and as gentle as possible removal of wasp and bee nests in roof and façade structures.
Fire protection
Fire protection in connection with roof and building envelope work.
Trust & reputation

ranQ Trust Score of giger + forrer gmbh: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

giger + forrer gmbh scores 72.0 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.67.924%
  • 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.68.910%
  • 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.88.08%
giger + forrer gmbh scores 92.4 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.82.07%
giger + forrer 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%
giger + forrer gmbh scores 25.7 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 35.25.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

giger + forrer gmbh reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.4 out of 5 stars from 14 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
4.4
of 5

Aggregated from 14 reviews across all connected sources

Sources
GGoogle4.414
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Flawilerstrasse 35
9113 Degersheim
Opening hours
Mon
06:30 - 17:30
Tue
06:30 - 17:30
Wed
06:30 - 17:30
Thu
06:30 - 17:30
Fri
06:30 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-113.252.965
Founded
2006 · 20 years
Last commercial register change
September 14, 2026
Employees
21 to 50
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.95.03%
    • Full methodology

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