Regional service
Flat-Roof Photovoltaics Graubünden – Loads, Roof Protection and Mounting
Flat roofs in Canton Graubünden offer large PV potential – provided mounting angles, wind loads and maintenance access are aligned before installation. Exactly this planning step decides yield, roof protection and later maintenance.
Local system fit
In Canton Graubünden, flat roofs on commercial buildings and multi-family homes represent the largest untapped solar area. Graubünden considers the specific conditions of high altitude in its energy law. New buildings have self-generation requirements, taking into account the extreme climatic conditions in mountain municipalities.
Flat-roof photovoltaics in Graubünden requires technically coordinated planning: wind load verification per SIA 261, roof membrane protection and SUVA-compliant fall protection are fixed components of every Vigorek project. The choice between east-west and south orientation is calculated individually based on available roof area, self-consumption profile and ballast requirements.
Project profile
Location
Graubünden
Service focus
Flat-Roof Photovoltaics
Regional fit
Graubünden
Context
How this service works in Graubünden in practice.
Graubünden comes with its own framework conditions – from incentives and tax treatment to technical requirements. From those, a cleanly managed project flow for your property takes shape.
Service focus
What matters most for flat roofs
Flat roofs in Canton Graubünden offer large PV potential – provided mounting angles, wind loads and maintenance access are aligned before installation. Exactly this planning step decides yield, roof protection and later maintenance. Flat-roof PV demands more than module rows on paper: wind load verification per SIA 261, roof membrane protection and SUVA-compliant fall protection are part of every Vigorek project scope. For multi-family buildings, commercial properties and industrial halls in Switzerland.
- Mounting concept based on wind zone, snow load and roof-edge clearance – ballasted or penetrating, with a traceable wind load verification per SIA 261.
- East-west or south layout matched to available roof area, self-consumption profile and ballast requirements – with realistic yield ranges rather than averages.
- Protection concept for the roof membrane (separation fleece), maintenance walkways (min. 20 cm foot clearance) and SUVA-compliant fall protection with guardrails from 1 m height.
- Structurally coordinated planning: PV dead loads, snow and wind loads per SIA 261, and existing roof structures – verified as a requirement, not an option.
Regional framework
Why this canton shifts the priorities
In Canton Graubünden, flat roofs on commercial buildings and multi-family homes represent the largest untapped solar area. Graubünden considers the specific conditions of high altitude in its energy law. New buildings have self-generation requirements, taking into account the extreme climatic conditions in mountain municipalities. Graubünden: pioneer of high-alpine solar systems. Nalpsolar (10 MW, 13 GWh/year at 2,000m), Scharinas (18.3 MW, 29 GWh/year, 13 GWh winter!). CHF 600/kWp facade subsidy = highest in Switzerland. Davos & St. Moritz: premium clientele + alpine peak conditions.
- In Canton Graubünden, load distribution, wind uplift and roof-skin protection must be resolved before ordering materials.
- Flat roofs require a different mounting concept than pitched roofs – standard solutions often lead to change orders.
- Maintenance paths and accessibility determine the long-term operating costs of the system.
Project logic
How structure and roof membrane are planned together
Graubünden grants tax breaks for PV construction – the entire costs are deductible as energy-saving investment. The deduction can be spread over several tax periods, which is particularly advantageous for larger alpine systems. Roof inspection assessing statics, roof skin and existing installations.
- Roof inspection assessing statics, roof skin and existing installations.
- Mounting geometry aligned with wind zone, tilt angle and usage concept.
- Protection concept for roof skin, walkways and future maintenance access.
Regional context
Flat-Roof Photovoltaics in Graubünden: what matters here
In Canton Graubünden, cantonal rules, the responsible grid operator and local permit procedures shape how a project is planned and delivered. The points below show what really matters before quoting, installation and handover.
- Regional starting point
- In Canton Graubünden, incentives, grid operators and permit procedures change the priorities for this service.
- Service core
- Flat-roof PV is not a standard grid: wind load, ballast, roof membrane protection, walkways and later access define the design.
- Grid & registration
- For Canton Graubünden, grid operators such as Repower, metering concept and commissioning are aligned early.
- Decision reason
- In Canton Graubünden, load distribution, wind uplift and roof-skin protection must be resolved before ordering materials.
- Execution
- Roof inspection assessing statics, roof skin and existing installations.
- Economic frame
- Feed-in tariff and self-consumption are matched to the property; in the canton, ab 6 Rp./kWh + HKN-Bonus (Repower) is one relevant reference point.
Cantonal framework
Which cantonal framework shapes the project in Graubünden.
The technical service stays the same, but the project frame changes with the canton. That is exactly where incentives, tax treatment and MuKEn requirements become strategically relevant.
Local context
Graubünden sets the economic pace for this service.
Thanks to altitude and cold, PV systems in Graubünden often deliver 30–50% higher yields than in the midlands. Projects like the alpine solar system on the Muttsee dam wall (Glarus/Graubünden) demonstrate the enormous winter electricity potential of the Alps.
In Canton Graubünden, flat roofs on commercial buildings and multi-family homes represent the largest untapped solar area. Graubünden considers the specific conditions of high altitude in its energy law. New buildings have self-generation requirements, taking into account the extreme climatic conditions in mountain municipalities.
Tax and subsidy logic
Graubünden grants tax breaks for PV construction – the entire costs are deductible as energy-saving investment. The deduction can be spread over several tax periods, which is particularly advantageous for larger alpine systems. CHF 600/kWp facade subsidy (doubled in Green Deal). Highest facade subsidy in Switzerland! Solarexpress: accelerated permit procedure for large systems since 2022. Repower: min. 6 Rp./kWh + HKN bonus (0.5 Rp. winter, 0.2 Rp. summer).
Permits and energy law
Solarexpress: accelerated permit procedure for large systems since 2022. Three projects in Surselva area approved 2024 (Nalpsolar, Scharinas, others). Alpine special rules for 2,000m+ systems. Tourism hotspots (Davos, St. Moritz): special procedure. Graubünden considers the specific conditions of high altitude in its energy law. New buildings have self-generation requirements, taking into account the extreme climatic conditions in mountain municipalities.
Market signal and location
Graubünden: pioneer of high-alpine solar systems. Nalpsolar (10 MW, 13 GWh/year at 2,000m), Scharinas (18.3 MW, 29 GWh/year, 13 GWh winter!). CHF 600/kWp facade subsidy = highest in Switzerland. Davos & St. Moritz: premium clientele + alpine peak conditions. Alpine solar systems above 1,200 m receive partial special subsidies. Besides the Pronovo one-time payment, the Canton of Graubünden offers contributions through the Building Programme. Large projects like alpine solar parks benefit from simplified federal approval procedures.
Facade subsidy
CHF 600/kWp Höchste der Schweiz (Green Deal)
Further reading
What genuinely helps you from here.
Whether you want to go deeper into the service, explore the location context or compare projects in nearby regions – here is where you continue.
Service
Flat-roof PV – service overview
Mounting, roof protection and project logic for flat roofs at a glance.
Location
Canton Graubünden – overview
Regional incentives, grid operators and framework conditions in Canton Graubünden.
Service
PV installation
The right entry point for general mounting questions.
Hub
Location overview
More regions and locations at a glance.
Nearby regions
The same service in other regions
Vigorek delivers this service in neighbouring cantons and municipalities too. Depending on location, subsidies and conditions can vary – a comparison is worthwhile.
Flat-Roof Photovoltaics St. Gallen – Loads, Roof Protection and Mounting
Canton St. Gallen: St. Gallen is a center for energy research – OST (Eastern Switzerland University of Applied Sciences) and the SPF Institute for Solar Technology in Rapperswil are among the leading solar research institutions in Switzerland. Here owners can find the services that matter most for planning, installation and commissioning in this region.
Flat-Roof Photovoltaics Glarus – Loads, Roof Protection and Mounting
Canton Glarus: As a mountain canton, Glarus relies on the combination of hydropower and solar for year-round renewable electricity supply. South-facing slopes in Glarus deliver up to 15% higher PV yields than lowland locations. Here owners can find the services that matter most for planning, installation and commissioning in this region.
Flat-Roof Photovoltaics Uri – Loads, Roof Protection and Mounting
Canton Uri: The Uri valley floor benefits from a Foehn-favoured climate with above-average sunshine hours. At altitudes above 1,000 m, PV yields increase by up to 20% compared to the midlands thanks to cold and reflection. Here owners can find the services that matter most for planning, installation and commissioning in this region.