Re-Roofing Before Installing Solar Panels

14th Mar 2026

Solar panels are designed to last 25 years or more.

That is a long commitment. Which is why the condition of your roof matters just as much as the panels themselves.

If your roof is already ageing or showing signs of wear, it is worth thinking carefully before installing solar.

Why Roof Condition Comes First

Once panels are fitted, they sit securely in place for decades.

If roofing work is needed later, the system has to be removed and reinstalled. That adds cost and disruption.

Re-roofing beforehand gives you a clean starting point. It means the structure beneath your solar system is sound and ready for the long term.

When Should You Consider Re-Roofing?

Not every roof needs replacing before solar. Many properties across Surrey are perfectly suitable as they are.

However, it is sensible to review things if:

  • Your roof is 20 years old or more

  • You have recurring leaks or water ingress

  • Tiles or slates are cracked, slipping or deteriorating

  • The roof structure feels uneven or weakened

  • You are already planning roofing work in the near future

Solar panels add weight, so the roof must be structurally strong. A professional survey will confirm whether reinforcement or replacement is needed.

The Cost of Doing It Later

It can be tempting to install solar first and deal with the roof if problems arise.

But removing panels for re-roofing later involves:

  • Labour to safely detach and store the panels

  • Temporary disconnection of the system

  • Reinstallation and recommissioning

Planning roofing work in advance avoids that double handling and unnecessary expense.

A Joined-Up Approach

In some cases, homeowners choose to coordinate both projects together. This keeps disruption to one period and ensures the mounting system is installed onto a brand-new surface.

If you are considering an in-roof solar system, this becomes even more relevant. In-roof systems integrate directly with the roof covering, so timing and coordination are important.

Peace of Mind for the Long Term

Solar is a long-term investment in lower bills and cleaner energy. It makes sense for the structure beneath it to match that lifespan.

A solid, well-maintained roof protects your home and supports the system properly. Once everything is in place, you can focus on the benefits of solar rather than worrying about what sits underneath.

If you are unsure about the condition of your roof, we can arrange a proper assessment before moving forward. It is always better to check early and plan with confidence.

Get in touch today

We'll get back to you within 24 hours.

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.