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.
Clarify before quoting
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.
Prefer to contact us directly? Send your property address, annual electricity consumption (if known) and preferred timing. Roof photos or existing plans help with the initial assessment.
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-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
Besides steep winter-power systems (CHF 300/kWp), Graubünden also funds large systems on residential buildings (CHF 150/kWp) if they produce clearly more power than the reference demand. How much solar power comes in winter depends strongly on the location: the winter share of the roof potential ranges from 23 to 32% by municipality (SFOE).
- 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
The order records these steps, responsibilities and required documents. Outstanding assessments belong in the schedule before work begins.
- 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.
Depending on the municipality, 23 to 32% of rooftop solar power in Graubünden comes in the winter half-year – most in Samedan (SFOE solar potential).
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. Two cantonal programmes that cannot be combined: CHF 150/kWp (max. CHF 50,000) for systems on residential buildings exceeding the reference demand of 20 W/m² of energy reference area by at least 50% and 3 kWp (Art. 23b BEG), or CHF 300/kWp (max. CHF 200,000) for winter-power systems with a 60–90° tilt (Art. 23a BEG). Both: global radiation above 1,250 kWh/m², application before construction; together with Pronovo at most 50% of costs.
Permits and energy law
Roof systems are subject to notification instead of a building application (Art. 40b KRVO): one form per building at least 15 days before installation; the municipality has 15 working days to state that a permit is required. Clarify protected buildings, townscape protection zones and larger facade systems in advance. 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
Besides steep winter-power systems (CHF 300/kWp), Graubünden also funds large systems on residential buildings (CHF 150/kWp) if they produce clearly more power than the reference demand. How much solar power comes in winter depends strongly on the location: the winter share of the roof potential ranges from 23 to 32% by municipality (SFOE). Besides the Pronovo one-time payment, the canton pays CHF 150/kWp for large systems on residential buildings or CHF 300/kWp for steep winter-power systems – not combinable and only with an application on energie.gr.ch before construction.
Residential buildings
CHF 150/kWp Area potential, Art. 23b BEG
Further reading
Service and location details
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.
Guide
PV incentives in Graubünden
CHF 300/kWp for winter power and CHF 150/kWp for area potential: check tilt, radiation and filing before construction.
Guide
PV permitting in Graubünden
Classify notification, municipal review and the 15-working-day period before installation in Graubünden.
Guide
PV feed-in payment in the Repower grid area
2026: SFOE reference market price, 6.0 ct./kWh up to 30 kWp, HKN add-ons and quarterly changes for Repower systems.
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.