Focus On: Slate Roofs



Slate roofs are beautiful and durable, but they often raise questions when it comes to solar panel installations. The good news? A slate roof shouldn’t put you off going solar.

At SolarTherm UK, we’ve been installing solar PV systems on all types of roofs for over 16 years—including many slate roofs. As the longest-running solar company in the South East, we have the experience, tools, and know-how to handle slate roofs with care and precision.

Slate roofs are harder to work on – slate is more delicate to work with compared to standard roof tiles – but if your installer is experienced, they will have the correct tools and techniques to install on a slate roof with ease. The way a slate roof is fitted makes removal for a solar installation more time consuming as it is not possible to remove a single tile and the tiles need to be cut to fit around the mounting brackets.

How is Solar Installed on a Slate Roof?

After initially measuring and marking where your solar array will sit, the roofer will start by removing a small number of tiles around where the bracket will go. Flashing will then be added to the rafter to ensure the roof remains waterproof, before the bracket is fixed to the rafter. Tiles will then be refitted, cutting any tiles around the bracket with a specialised slate cutter. Once the tiles are refitted, the rails can be fitted to the brackets and your solar panels are mounted onto the rails.

Are There Any Alternatives?

Absolutely! If you are unsure about having solar panels installed onto your slate roof, the alternative solution is to have integrated, in-roof solar panels installed. With these, SolarTherm UK will remove the tiles from where your solar panels are being installed and use a GSE in-roof kit to fit your panels.

💡 Top Tip:
The most cost-effective time to install integrated solar is during a roof replacement. You’ll save on labour and avoid the cost of scaffolding being erected twice—potentially reducing your overall project costs significantly.

Thinking About Solar on Your Slate Roof?

Talk to SolarTherm UK – we’ll guide you through your options and help you find the best solution for your home. Call us today for your free bespoke design package – tailored to your property, usage and future energy needs. No hard sell, just honest, expert advice.