It’s one of the most common (and understandable) concerns homeowners have before installing solar:
“Will solar panels damage my roof?”
Especially if you live in:
- An older property
- A slate or stone-roofed home
- A listed or character building
The short answer is: No, when installed correctly, solar panels should not damage your roof.
But there are situations where problems can occur, and they almost always come down to poor installation, not solar itself.
This guide explains how solar is fixed to your roof, what actually causes damage, and how to make sure your roof stays watertight and protected.
How Solar Panels Are Actually Installed on a Roof
Solar panels are not drilled through your roof tiles.
A proper installation involves:
- Removing specific tiles or slates
- Fixing mounting brackets securely to the roof rafters
- Reinstating tiles around the brackets
- Sealing and flashing to maintain weatherproofing
The panels then sit on rails above the roof, allowing airflow underneath. When done correctly, the roof remains fully watertight.
What Can Cause Roof Damage? (And How to Avoid It)
Let’s be honest, roof damage can happen. But it’s not because of solar panels themselves.
1. Poor Installer Workmanship
This is the biggest risk.
Common mistakes include:
- Incorrect fixing points
- Over-tightened brackets
- Cracked tiles not replaced
- Poor flashing around fixings
Solution:
Choose an installer who inspects your roof properly and uses experienced roof-trained installers — not just electricians.
2. Old or Fragile Roofs (Not Checked First)
If a roof:
- Is already nearing end-of-life
- Has existing leaks
- Has rotten battens or felt
Installing solar without addressing this first can cause issues later. Good installers will tell you if your roof needs attention before solar goes on.
Wrong Fixings for the Roof Type
Different roofs need different systems.
Examples:
- Concrete tiles
- Natural slate
- Yorkshire stone
- Metal or flat roofs
Each requires specific brackets and methods. Using the wrong fixings is a red flag.
Does Solar Increase the Risk of Leaks?
Not when installed correctly.
In fact:
- The panels actually protect the section of roof beneath them from weather exposure
- Roofs under panels often age slower than uncovered areas
Leaks are almost always linked to:
- Poor flashing
- Missed cracked tiles
- Rushed installs
What About Older or Stone Roofs?
This is a big one, especially in Yorkshire and other historic areas.
Solar can be installed on:
- Older homes
- Slate roofs
- Stone roofs
But it requires:
- More time
- Specialist fixings
- Experienced installers
Some companies avoid these roofs because they take longer — not because they’re unsafe. A careful install protects the roof and preserves the character of the building.
Will Solar Void My Roof Warranty?
Usually, no, if installed properly.
Most installers:
- Provide workmanship warranties
- Use manufacturer-approved mounting systems
- Carry insurance-backed guarantees
If your roof is newer, it’s important to:
- Inform your installer of any existing warranties
- Ensure fixings follow manufacturer guidelines
Does Solar Add Weight to My Roof?
A standard solar system adds roughly:
- 15–20 kg per square metre
That’s comparable to:
- A layer of roof tiles
- Or light snow loading
UK roofs are designed to handle this comfortably. Structural issues are rare and assessed during surveys.
The Biggest Myth: “Solar Ruins Roofs”
In reality:
- Poor installs ruin roofs
- Solar panels do not
A good installation:
- Leaves the roof watertight
- Protects part of the roof from weather
- Can even reduce long-term wear
The key factor isn’t the panels. It’s who installs them.
How to Protect Your Roof Before Installing Solar
Before choosing an installer, ask:
- Do you check roof condition first?
- Do you replace cracked tiles during install?
- Do you use roof-specific fixings?
- Is your work insured and guaranteed?
If these aren’t answered clearly, walk away.
So… Will Solar Panels Damage Your Roof?
For the vast majority of homes:
- No — when installed correctly
- Yes — if rushed, cheap, or poorly designed
Solar doesn’t damage roofs. Bad installations do.
That’s why experience, care, and proper design matter just as much as price.
If you’re considering solar and want your roof treated with the care it deserves, including older, slate, or stone roofs. Simply fill out the form below or give us a call on 01422 768113.