Can you Install Solar Panels on a Metal Roof?

Written-by

Janet Richardson

Reviewed-by

Richard Burdett

Updated on

Jan 23, 2026

Can you Install Solar Panels on a Metal Roof?

Solar panels have become a popular choice for homeowners and businesses in the UK looking for a sustainable and economical way to generate electricity. If you are considering installing a solar PV system but are not sure whether solar panels are compatible with your metal roof, rest assured that in most instances metal roofs are an excellent match for solar energy systems. 

Metal roofing for both residential and commercial properties has grown in popularity in recent years due to its cost-effective price and ease of installation. It can offer an eco-friendly, low-maintenance and versatile roofing option. It’s also available in most styles, colours and a variety of materials. Furthermore, you can still install solar panels onto a metal roof thanks to the number of different mounting systems available in today’s market. In fact, it’s a great choice due to metal’s durability, longevity and reflective properties. 

Benefits of Installing Solar Panels on a Metal Roof

Longevity and durability: 
Metal roofs are known for their longevity and durability with lifespans of 50 years or more. They last much longer than shingles. This means that you are unlikely to have to replace your roof before your solar panels reach the end of their useful life. Most solar panels can last up to 25 years or more when installed properly which makes them a smart investment. Metal roofs provide a secure and stable base for solar panels to rest on as they are resistant to corrosion, rust, and other types of damage. 

Lightweight Structure:
Metal roofs are lightweight which reduces stress on your property’s structure. This makes them ideal for supporting the additional weight of solar panels without requiring significant structural reinforcements.

Reflectivity: 
Metal roofs are already highly reflective, especially those with light coatings which means that they reflect much of the sun’s heat and energy away from buildings, keeping them cooler. This can reduce the need for air conditioning which can lead to lower energy bills. Solar panels then fitted to a metal roof adds shade and the overall effect created is a powerful cooling and energy-generating combo. By adding solar panels to metal roofs, some of that energy is captured and converted into electricity which can significantly increase a building's energy efficiency and reduce grid reliance. 

Ideal Surface: 
Metal roofs offer consistent surfaces, making them easier to work with than other materials, with various systems designed for different profiles. 

Minimal Maintenance Required: 
Metal roofs require very little maintenance, and solar panels installed correctly are designed to withstand harsh weather conditions.

Cost Savings:
Metal is one of the most cost-effective roofing options. Adding solar panels to a metal roof is a way to reduce energy bills and potentially earn money via the Smart Export Guarantee. Metal roofs and solar panels both have long lifespans, making them a cost-effective investment over time.

Eco-Friendly Combination:
Both metal roofs and solar panels contribute to sustainability. Metal roofs are typically made from recycled materials such as steel or aluminium, and reflect sunlight, reducing any potential cooling costs. Metal roofing is also 100% recyclable at the end of its lifespan. Pairing a metal roof with solar panels creates a highly energy-efficient and environmentally friendly setup. Property owners can reduce their building energy consumption and carbon footprint. 

Easy installation without penetrations:
Solar panels can be installed on metal roofs without penetrations, which helps to maintain the roof's integrity and prevent leaks. This is possible using specialised mounting systems that clamp onto the standing seams or corrugations of the metal roof.

Compatibility:
Metal roofs are compatible with a large range of mounting and racking systems specifically designed for metal roofs that are widely available.

Consistent aesthetic:
The modern styles of metal roofs make them highly visually compatible with solar panels, ensuring a sleek, consistent aesthetic.
What considerations do you need to be aware of when installing solar panels on a metal roof?

Professional installation:
It’s very important to hire a reputable, accredited and trusted metal roof specialist to ensure a secure and effective installation. Your installer needs to be experienced with metal roofs to handle thermal expansion and maintain waterproofing. 

Warranty:
Check if your solar installation will affect your roof's warranty as some manufacturers require specific methods.

Electrical grounding:
Metal roofs are conductive and must be properly grounded for safety. 

Installation and waterproofing risks:
Corrugated roofs often need holes. These holes are at risk of causing leaks if not perfectly sealed which can lead to corrosion or water damage. 
Non-penetrating clamps work well for standing seam but must be installed properly to avoid them failing or damaging the roof. 
Any cuts to the metal must be properly treated to prevent rust. 

Structural and warranty concerns:
Make sure your metal roof is in good condition before installation to prevent worsening existing issues or shortening your roof’s life. Address any repairs or maintenance needs to avoid complications later. Incorrect installation methods can void your metal roof's warranty, so compatibility must be confirmed before going ahead with the installation. Structural load is also important. While metal roofs are strong, older farm or industrial buildings may need reinforcement to support panel weight. 

Local regulations:
Check with your local council about any planning permissions or guidelines for installing solar panels.

Maintenance access:
Ensure easy access to your roof for ongoing maintenance. Poor planning can block access to vents or skylights for example.

Potential noise:
While insulation can help, this may be something you want to discuss with your installer as rain or hail can be very noisy on metal roofs. 

Compatible mounting system:
Ensure you have the right mounting system that is compatible with your metal roof. 

Roof orientation and angle for optimal sunlight exposure:
Solar panels should be installed on a south-facing roof with a 30-degree tilt for optimal sunlight exposure.

Potential obstructions and shading factors:
As with any roof it’s important to check whether there are any trees, chimneys and other structures that cast shadows on the roof, which can reduce the amount of sunlight that reaches your solar panels.

Types of Metal Roofs for Solar Panels in the UK

• Standing seam metal roof:

They are made of steel, aluminium, and zinc. Standing seam metal roofs with integrated solar panels are the most popular option in UK homes. The roofs feature interlocking seams that create a watertight seal, and they are very strong and durable. Solar panels can be easily installed on standing seam metal roofs using clamp-based mounting systems with no roof penetrations. These roofs have a lifespan of between, 40 to 70 years. It has the highest upfront roof cost, but the lowest solar install risk. 

• Corrugated metal roof:

They are made of steel or aluminium. Corrugated metal roofs are another popular type of metal roof, often used on agricultural and industrial buildings. They feature as wavy ridged sheets, and solar panels can be mounted on them using surface-attached mounts or ballasted systems. They are bolted onto roof structure and penetrations are required so they must be sealed correctly. They have a typical lifespan of 30 to 50 years. 

• Trapezoidal (Box Profile) Metal Roof:

They are made of steel and aluminium and are similar to corrugated roofing. They feature angular ridges which are box shaped. Trapezoidal roofs are widely used on warehouses and industrial units and have a lifespan of 30 to 50 years.  They require specialist fixings for watertightness and are also compatible with solar installations. 

• Metal shingle roof:

They are made of steel and aluminium. Metal shingle roofs feature small interlocking tiles and are a more aesthetic option than other metal roofs. They are often used on residential and commercial buildings. Solar panels can be installed on metal tile roofs using surface-attached mounts or ballasted systems. The mounting systems for solar installations are more complex, and they can incur a higher labour cost. They have a lifespan of between 40 and 70 years. 

• Zinc roof (including standing seam zinc)

They are made of zinc. Zinc roofs feature flat or standing seams. It is important to avoid incompatible metals due to the risk of galvanic corrosion. Specialist installers are recommended though zinc roofs are compatible with solar installations. They have a typical lifespan of 60 to 100 years. 

• Aluminium roof:

They are made of aluminium. Aluminium roofs feature as standing seam, corrugated or sheets. These roofs are ideal for older structures as they are lightweight. They are also corrosion resistant. Correct grounding is required for solar installations though they are also compatible with solar systems. They have a typical lifespan of 40 to 60 years. 

Solar Mounting Systems for Metal Roofs

Standing seam clamp mounting systems:
These mounting systems are used on standing seam metal roofs. Specially engineered clamps attach directly to the raised seams of the roof without drilling. Solar rails or panels are then fixed to the clamps. They are non-penetrative which preserves the roof warranty and are also highly weatherproof. The installation can be done quickly but they are only compatible with standing seam profiles. They are best used on residential and commercial buildings and long-life roofs. Common materials used are aluminium clamps and stainless-steel fasteners. 

Rail-based bracket mounting systems:
These mounting systems are used on corrugated, trapezoidal (box profile), and flat metal roofs. Metal brackets are bolted through the roof sheet into rafters or purlins. Aluminium rails are then mounted to support the solar panels. This is a strong structural fixing which is highly adaptable to different roof profiles and widely available in the UK. EPDM or butyl rubber seals and flashing plates or sealing washers are used for waterproofing. These mounting systems are ideal for agricultural and industrial buildings and retrofit installations. Correct sealing is vital or leaks can be a problem as penetration is required. Careful alignment with the roof structure is also a necessity. 

Direct-Fix (Rail-Less) Mounting Systems:
These mounting systems are used on standing seam and profiled metal roofs. Solar panels are fixed directly to mounting points or clamps without continuous rails, reducing material use and installation time. These systems are lightweight, the material used is less expensive and there is reduced wind loading. Penetration is required depending on the roof type. They are ideal for smaller residential systems and low-profile aesthetic installs. On the downside there is less flexibility available for panel layout and precise installation is a necessity.

L-Foot Mounting Systems:
These mounting systems are used on corrugated and trapezoidal metal roofs. L-shaped brackets are bolted through the metal sheet into the roof structure and used to support solar rails. These systems offer a simple cost-effective solution, compatible with most rail systems. EPDM gaskets and self-sealing roofing screws are used as sealing methods. They are ideal for standard pitched metal roofs and retrofit installs. Penetrations are required and must be sealed carefully. These systems are also less elegant than clamp systems.

Mini-Rail Mounting Systems:
These mounting systems are used on corrugated and trapezoidal metal roofs. Short aluminium rails are fixed directly to the roof sheet, with panels attached to these mini rails rather than full-length rails. These systems offer reduced aluminium usage, faster installation and improved airflow beneath panels. They are ideal for residential metal roofs and weight sensitive structures. These systems require roof penetrations, and their layout flexibility is reduced.

Ballasted Mounting Systems (Limited Use):
These mounting systems are used on flat metal roofs. Panels are held in place using weighted frames rather than roof fixings. Ballasted systems are rare on metal roofs due to weight and wind uplift risks and are usually only suitable where structural capacity is confirmed. Generally, penetrations are not required. On the plus side these systems are quick to install.

Integrated Solar Mounting Systems:
These mounting systems are used on new-build or roof replacement projects. Solar panels or laminates are integrated into the metal roof system itself, acting as both roof covering and energy generator. Generally, penetrations are not required. These systems have a seamless appearance, reduced mounting hardware and excellent weatherproofing. They are ideal for new constructions and architectural metal roofing. They tend to have a higher upfront cost and specialist installation is required. 

Key Considerations when Choosing a Metal Roof Mounting System

• Roof profile compatibility (standing seam versus profiled sheet) 
• Penetration vs non-penetration requirements
• Compliance with UK standards (MCS, Eurocodes)

For solar mounting on a UK metal roof, you need systems compliant with MCS 012 (for wind, fire, weather-tightness) and Eurocodes (specifically EN 1991 for loads, EN 1993 for steel structures), ensuring structural integrity and performance, especially for wind uplift. By selecting MCS 012 certified products and ensuring they align with relevant Eurocodes, you ensure a safe, durable, and financially viable solar installation on your metal roof. 

Wind uplift calculations
Wind uplift calculations are engineering assessments used to determine the upward force wind exerts on a building, specifically on roofing systems, to prevent damage or failure. These calculations are crucial for determining the necessary number of fixings, fastener density, or ballast needed to keep a roof secure. 

Thermal expansion allowance
A thermal expansion allowance is the calculated extra space or flexibility built into structures, pipes, or materials to accommodate their natural expansion and contraction due to temperature changes, preventing stress, damage, and failure by allowing for increases in length, area, or volume as they heat up and decrease as they cool. This allowance ensures that systems, like pipework or building joints, can safely move without breaking or misaligning when temperatures fluctuate. 

Corrosion resistance & metal compatibility
Installing solar photovoltaic (PV) systems on metal roofs is considered highly compatible and efficient because both materials share long lifespans (25–70 years). However, the key to long-term performance is managing corrosion resistance and metal compatibility to avoid galvanic corrosion, which occurs when dissimilar metals meet in the presence of moisture (an electrolyte).