Choosing Between In-Roof and On-Roof Solar Mounting Systems in Surrey

7th Oct 2025

When it comes to solar energy, panels are only a part of the picture. How those panels are mounted on your home or business makes a big difference to the look, performance, and value of your system. 

At Sheerwater Solar, we offer both in-roof and on-roof mounting systems. Whether you prioritise a sleek aesthetic, maximum flexibility, or long-term durability, there is a solution to suit your needs.

In this blog, we’ll take a closer look at the two main options, what sets them apart, and the trusted brands we work with to deliver systems that combine smart design with lasting performance.

In-Roof Mounting Systems: The Sleek, Low-Profile Choice

In-roof mounting systems integrate solar panels directly into your roof rather than sitting on top. This creates a finish that blends seamlessly with the building. 

For many homeowners in Surrey, especially those conscious of design and kerb appeal, this option strikes the perfect balance between function and aesthetics.

Because the panels form part of the roof itself, in-roof systems don’t just look good. They also provide excellent weather protection, keeping your home secure from rain, wind, and snow while generating clean energy at the same time. 

It’s a smart investment for anyone looking to enhance their property’s appearance as well as its energy performance.

GSE: A Versatile and Cost-Effective Solution

The GSE In-Roof Mounting System replaces traditional tiles or slates to deliver both practicality and style. It is known for:

  • 100% waterproofing for protection in all conditions

  • Resistance to wind and snow loads for reliable year-round performance

  • Universal design adaptable to almost any roofing material

If you are looking for performance, aesthetics, and affordability in one package, GSE is a strong choice.

Solar Panel Image

Viridian: Compact Power with Elegant Design

Viridian’s in-roof panels are designed for homeowners who value a refined, modern finish. Their key features include:

  • Push-fit connections for quick, secure installation

  • Weather-tight seal without altering your existing roof structure

  • Compact design that maximises roof space and power generation

  • Hidden clamps that create an uncluttered, sleek aesthetic

Durability and wind resistance backed by independent accreditation

Sandtoft: The Complete Package

Sandtoft offers a full in-roof solar solution that goes beyond panels alone. The system includes panels, inverters, and batteries, creating a comprehensive package. Highlights include:

  • Quick installation, with panels fitting directly onto roof battens in under a minute

  • Ethical manufacturing, certified to high standards

  • Future-proof design, meeting top building regulations and aligned with the Future Homes Standard 2025

For homeowners and professionals, Sandtoft simplifies solar integration while keeping homes modern and compliant with future standards.

On-Roof Mounting Systems: Flexible and Reliable

On-roof systems sit above your existing roof, giving flexibility in orientation and tilt to capture as much sunlight as possible. They are ideal for both residential and commercial properties where energy generation is the priority. Alongside their performance, they are designed to look good and last.

Renusol: Simplicity, Strength, and Service

Renusol brings more than two decades of experience. Key points include:

  • Choice of colours in black or silver for compatibility with roof aesthetics

  • Easy installation and durability

Renusol ensures your panels are secure and supported by proven expertise.

K2: Innovation for Every Roof

Since 2004, K2 Systems has been developing versatile solar mounting solutions. Known for their safety and robustness, K2 products are:

  • Available for flat and pitched roofs, facades, and specialised applications

  • Backed by tailored planning services, great for unique projects

  • Supported by a detailed online catalogue, offering technical drawings, certifications, and component details

K2 combines practical design with forward-thinking technology, making it a reliable partner for diverse solar projects.

Which Mounting System is Right for You?

Choosing between in-roof and on-roof systems depends on your priorities:

  • Choose in-roof if you want a streamlined look and integrated design with brands like GSE, Viridian, or Sandtoft.

  • Choose on-roof if flexibility, tilt optimisation, and proven durability are more important, with options like Renusol or K2.

We understand that all of these options may feel overwhelming, which is why our friendly team is always available to answer your questions and make the process easier for you. Give us a quick call to better understand which mounting system is right for you!

At Sheerwater Solar, we tailor each installation to suit your property in Surrey. Working with these trusted brands ensures your system looks right, performs well, and adds lasting value.

 

Final Thoughts

Mounting systems may not be the first thing you think about when considering solar, but they are just as important as the panels themselves. They determine how your system looks, how well it performs, and how long it lasts.

Whether you choose the sleek integration of in-roof systems or the flexible reliability of on-roof options, Sheerwater Solar has the expertise to help you make the right decision. With our range of high-quality solutions, you can harness the sun’s energy while enhancing the comfort, appearance, and value of your property.

Start your journey to cleaner, smarter energy today. Get in touch now to find out how our in-roof and on-roof systems can transform your property with sustainable power and lasting value.

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Reaching out to Sheerwater Solar is straightforward and hassle-free. Whether you’re interested in solar panels for your home or business in Woking, we’re here to guide you every step of the way. You can contact us directly by calling 01932 627 555 or by sending an email to info@sheerwatersolar.co.uk.

Alternatively, fill in our online form for a swift response.

What happens next?

In most cases, we’ll need to conduct an on-site survey at your property to assess the feasibility and provide you with a tailored quote. This visit allows us to understand your specific needs and explore the potential for renewable energy solutions. Following the survey, we’ll discuss the best options for integrating solar energy into your property, including detailed costs and the installation process.

We’re excited to assist you on your journey to renewable energy and look forward to hearing from you.