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DirectoryConstruction & ArchitectureInsulationGrolleyPHIDA SIFFERT Étanchéité (FR) SA
PHIDA SIFFERT Étanchéité (FR) SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

PHIDA SIFFERT Étanchéité (FR) SA carries out waterproofing and insulation work on flat roofs, terraces and façades. Its services also include green roofs, preparing roofs for photovoltaic panels, roof maintenance and leak detection.

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Service area

Offering

Products & services

Industry:Insulation
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4.3/5

PHIDA SIFFERT Étanchéité (FR) SA

✓ Offered12
Roof waterproofing and insulation
Bituminous and synthetic waterproofing, thermal insulation, flat roofs, terraces and façades; new builds, maintenance of existing roofs and investigation of infiltrations.
Green and photovoltaic roofs
Green roofs, gravel and photovoltaic panels; roof preparation, structural reinforcement, fixings and waterproofing adapted to integrate solar installations.
Roof maintenance and snow clearing
Annual roof maintenance, diagnosis of the roof condition, expert report and snow clearing of roofs in winter.
Infiltration detection
Diagnosis of infiltrations in the building, identification of the cause and proposal of suitable solutions to address the problem.
Probing, diagnostics and expert report
Roof probing, technical diagnostics and expert report to prepare a quotation or assess the condition of a structure.
Application for energy subsidies
Assistance with the application for energy subsidies for roof renovation and insulation, preparation of the file and administrative follow-up until payment.
Sheet metal works and roofing
Design, fabrication and restoration of sheet metal parts; installation of roofing with tiles, sheet metal, fibre cement or slate, on flat roofs or pitched roofs.
Thermal insulation and installation of roof windows
Thermal insulation of roofs and installation of roof windows, for new construction and renovation.
Resin
Resin floor coatings in synthetic resin, liquid-applied waterproofing, terrazzo, exterior waterproofing and surface treatment by shot blasting, grit blasting, grinding and anti-corrosion coating.
Ventilated façade
Design and installation of ventilated façades with polyethylene panels, metal panels and mineral panels, for new-build projects or renovation.
Plumbing
Installation, renovation, maintenance and troubleshooting of sanitary fixtures, tap fittings, pipework, water networks and production of domestic hot water.
Technical training and waterproofing tutorials
Course materials, roof seminars, SIA 271 standard and video tutorials for the design, selection of materials and best practices.
Trust & reputation

ranQ Trust Score of PHIDA SIFFERT Étanchéité (FR) SA: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of November 2026

PHIDA SIFFERT Étanchéité (FR) SA scores 69.2 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.65.024%
  • 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.78.08%
PHIDA SIFFERT Étanchéité (FR) SA 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%
PHIDA SIFFERT Étanchéité (FR) SA 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%
PHIDA SIFFERT Étanchéité (FR) SA scores 88.6 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 35.88.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

PHIDA SIFFERT Étanchéité (FR) SA reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.3 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 November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.3
of 5

Aggregated from 16 reviews across all connected sources

Sources
GGoogle4.316
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Au Martzé 5
1772 Grolley

At a glance

Legal form
Corporation
UID
CHE-106.166.711
Founded
1987 · 39 years
Last commercial register change
January 14, 2025
Employees
21 to 50

Active in 1 of 26 cantons

  • FRFribourg
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.100.06%
  • 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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