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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint744,877 companies indexed · Last updated: today
DirectoryCrafts & TradesRoofingGossau SgAltherr Gossau AG
Altherr Gossau AG Logo
Verified· 4 sources

Altherr Gossau AG

Summary

About the company

Altherr Gossau AG carries out building-envelope work including roofing, façades, waterproofing, sheet-metal work and lightning protection. The company designs and installs photovoltaic systems (in-roof and on-roof), and provides scaffolding, crane work and transport, building maintenance, construction management and energy consulting, plus drone imaging and system monitoring.

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Products & services

Industry:Roofing
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Building envelopes & facades
Roofing, facade construction and waterproofing for pitched roofs, flat roofs and facades; including thermal insulation, photovoltaic integration and overall site management for building envelope projects.
Sheet metal work & lightning protection
Sheet metal work in copper, chromnickel steel, zinc and aluminium, as well as planning, execution, coordination, documentation and handover of lightning protection systems.
Photovoltaics
Roof-integrated and surface-mounted photovoltaic systems, automatic system monitoring, documentation, approvals and administration of subsidies; on request combined with battery storage.
Scaffolding
Facade scaffolds, safety nets, rolling scaffolds, roofers’ safety screens and flat roof guardrails for new builds, renovations and public buildings in accordance with SUVA regulations.
Crane work & transport
Transport and crane service with MAN trucks and a Palfinger 32-metre crane, including work basket and grab; flexible for construction projects, bookable by the hour, day or week.
Reviews

Aggregated rating

Aggregated rating
4.6
of 5

Aggregated from 13 reviews across all connected sources

Sources
GGoogle4.613
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

July 6, 2024Media
Erfolgreiche Lehrlinge bei Altherr Urnäsch AG und Altherr Gossau AG | Firmennews
gossau24.ch
June 30, 2022Media
Urnäscher Betrieb übernimmt Gossauer Spenglerei
tagblatt.ch

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Location

Industriestrasse 15
9200 Gossau Sg
Opening hours
Mon
07:30 - 12:00, 13:15 - 17:00
Tue
07:30 - 12:00, 13:15 - 17:00
Wed
07:30 - 12:00, 13:15 - 17:00
Thu
07:30 - 12:00, 13:15 - 17:00
Fri
07:30 - 12:00, 13:15 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-115.910.420
Founded
2010 · 16 years
Last commercial register change
October 14, 2025
Employees
21 to 50

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