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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryCrafts & TradesRooferMolliselmer + blumer AG
elmer + blumer AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

elmer + blumer AG carries out roofing and sheet-metal work and installs photovoltaic systems. It also provides consulting and planning for new builds and renovations, as well as energy advice, construction management and other specialist work.

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Service area

Offering

Products & services

Industry:RooferSheet metal worker
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elmer + blumer AG

Photovoltaics
✓ Offered12
Photovoltaics
Photovoltaic systems and PV systems, consulting, planning, installation and commissioning for roofs; tailored to architecture, energy demand and funding options.
Flat roof
Flat roofs for new builds, renovations and tailor-made solutions, as warm-roof or inverted-roof systems, on request with green roofing and suitable details.
Sheet metal work
Sheet metal cladding, gutters, custom-made covers and other sheet-metal work to protect roof and façade; including standards-compliant lightning protection.
Consulting
Consulting for new builds, renovations and energy measures, including energy consulting, photovoltaics, building submissions, funding applications and site management.
Planning
Planning for renovations, extensions and new builds with functional, cost-effective concepts; practical, precise and tailored to needs.
Roofing work
Roofing work for flat roofs, pitched roofs, façades, roof windows and roof service; solutions for new builds, renovations and preservation of the building envelope.
Lightning protection
Lightning protection systems for buildings, in connection with sheet metal work and standards-compliant execution to protect roof and façade.
Roof service
Roof service for maintenance and preservation of roofs, complemented by roofing work focusing on protection, energy efficiency and long-term performance.
Pitched roof
Pitched roofs as part of roofing work, for new builds and renovations with functional and durable solutions.
Façades
Façade work as part of roofing work, for protection and design of the building envelope.
Roof windows
Roof windows as part of roofing work, for installation and integration into the building envelope.
Alterations
Building alterations within the services, supplemented by consulting and planning for existing buildings and adjustments to the construction project.
Trust & reputation

ranQ Trust Score of elmer + blumer AG: 4.5 out of 5.0

Trust Score4.5/ 5.0

Excellent

x

Data basis 96% · As of November 2026

elmer + blumer AG scores 82.3 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.81.124%
  • 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.74.910%
  • 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.95.08%
elmer + blumer AG scores 92.3 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%
elmer + blumer AG 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%
elmer + blumer AG scores 45.7 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 35.45.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

elmer + blumer AG reaches a ranQ Trust Score of 4.5 out of 5.0 — rated «Excellent». The rating draws, among other things, on 4.8 out of 5 stars from 18 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
4.8
of 5

Aggregated from 18 reviews across all connected sources

Sources
GGoogle4.818
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Zinggenstrasse 1
8753 Mollis
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 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-113.516.124
Founded
2007 · 19 years
Last commercial register change
May 21, 2025
Employees
21 to 50

Active in 1 of 26 cantons · 2 municipalities

  • GLGlarus
  • GLGlarus Nord
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.
100.0
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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