Installing solar panels on a slate roof is not a standard job—and not every solar company is equipped to do it right. The wrong installer can cause thousands of dollars in roof damage that far outweighs any potential energy savings. Before signing a contract, homeowners should ask the right questions to make sure their slate roof stays intact and watertight for decades to come.
Here’s a simple checklist to guide you through the process.
1. Have You Installed Solar Panels on a Slate Roof Before?
This is the first and most important question. Experience matters. Many solar companies specialize in asphalt or metal roofs, but slate requires a completely different skill set.
Look for an installer who has a proven record of working with slate roofing materials and can show photos or references from similar projects. A true slate specialist will know how to move on the roof safely and handle each tile with care.
2. What Mounting System Will You Use?
The mounting system is what connects your solar panels to your roof. If your installer mentions drilling directly through slate tiles, stop there. That approach almost always leads to cracks and leaks.
Ask specifically about non-penetrating systems such as the Solar Slate Plate, which allows secure installation without damaging the tiles. A qualified installer should be able to explain exactly how the mounting system protects your roof’s integrity.
3. How Do You Prevent Leaks or Roof Damage During Installation?
A professional solar installer should describe how they stage ladders, distribute weight, and handle fragile slate tiles to avoid breakage. They should also outline what precautions they take to maintain weatherproofing and how they plan to seal around each attachment point.
If their answer sounds vague or rushed, that’s a red flag.
4. Are Roof Repairs or Replacements Covered by Warranty?
Even with expert installation, homeowners should understand how their warranties work. Ask what’s covered by the roof warranty, the solar equipment warranty, and the workmanship warranty from the installer.
A reliable company will provide clear documentation showing how your roof is protected and for how long.
5. Do You Coordinate With a Slate Roofing Contractor?
Some of the best solar companies partner with professional slate roofing contractors for added expertise. This ensures that the roof remains structurally sound and watertight throughout the installation. If your installer doesn’t have this type of partnership, ask whether they’re willing to collaborate with a roofing specialist you trust.
Choose Experience Over Price
The cheapest quote isn’t always the best deal—especially when it comes to slate. A contractor who understands the complexity of slate roof installations will save you money, stress, and repairs in the long run.
By asking these questions and verifying experience, you can feel confident your roof will look beautiful and perform perfectly for decades.
Need Help Finding a Qualified Slate Roof Solar Installer?
SolarOnSlate.com connects homeowners and installers with the right tools and expertise for slate roof solar projects. Visit the site to learn more about safe installation methods, specialized hardware, and certified professionals who know how to do the job right.
