How Are Solar Panels Attached to a Tiled Roof? UK Guide 2026
If you're considering solar panels for a tiled roof, one of the first questions you might have is surprisingly simple:
What actually holds the panels onto the roof?
Solar panels are not normally screwed directly into roof tiles.
Instead, a mounting system is fixed to the structural parts of the roof beneath the tiles. Roof hooks or brackets connect to the roof structure, aluminium rails attach to those brackets, and the solar panels are then clamped securely to the rails.
The tiles continue to perform their normal job of keeping rain out, while the mounting system transfers the weight and wind forces from the solar array into the structure of the roof.
In this guide, we'll look at exactly how a typical UK tiled-roof solar installation works, what happens to the roof tiles, why installers leave a gap beneath the panels, and what homeowners should check before and after installation.
Last reviewed: September 2026
Quick Answer: How Are Solar Panels Fixed to Roof Tiles?
On a typical pitched tiled roof, the installation usually follows this basic structure:
Roof structure → mounting brackets/hooks → aluminium rails → panel clamps → solar panels
The solar panels themselves should not normally rely on the roof tiles for structural support.
Instead, the mounting brackets transfer the forces generated by the panels into the supporting roof structure.
This is important because clay and concrete roof tiles are designed primarily as weatherproof roof coverings, not as structural mounting points.
MCS's solar mounting standard specifically addresses mounting systems used with fragile roof coverings such as slate, clay and concrete tiles and requires the system to avoid damaging the roof covering while maintaining weather resistance.
The Main Parts of a Tiled-Roof Solar Mounting System
A typical installation uses four main components.
1. Roof hooks or brackets
These provide the connection between the solar mounting system and the roof structure.
The installer temporarily lifts or removes selected tiles to gain access to the structure beneath them.
The mounting bracket is positioned according to the mounting-system design.
The tile is then returned to its position around the bracket.
The objective is to create a strong mechanical fixing without making the tile itself carry the solar array.
2. Aluminium mounting rails
Once the roof hooks have been installed, long aluminium rails are attached across the roof.
These create a straight mounting frame for the solar modules.
The installer carefully aligns the rails before the panels are fitted.
3. Solar panel clamps
The panels are secured to the rails using specially designed clamps.
There are normally two types:
End clamps secure panels at the outside edges of the array.
Mid clamps secure neighbouring panels where two modules meet.
4. Solar panels
The modules sit above the roof covering rather than directly on the tiles.
This creates the familiar appearance of conventional rooftop solar panels.
Illustration: What the Mounting System Looks Like
Think of the installation as several layers.
Solar panel
↓
Panel clamp
↓
Aluminium rail
↓
Roof hook / bracket
↓
Structural roof
The tiles remain underneath and around the mounting system.
This is why a correctly designed installation doesn't simply involve drilling through random roof tiles and screwing panels into them.
Step 1: The Roof Is Inspected Before Installation
Before installing panels, the condition and structural suitability of the roof should be assessed.
Installers need to consider factors such as:
roof construction
roof condition
tile condition
rafters or other structural members
proposed panel weight
mounting system weight
wind forces
snow loading
array location
UK Building Regulations normally apply to rooftop solar installations, and the ability of the existing roof to support the additional load needs to be checked. Strengthening may sometimes be required.
MCS installation requirements also state that a pitched roof structure should be checked by a suitably competent person to ensure it can withstand the loads imposed by the solar PV system.
Once you know your roof may be suitable, the next question is usually how much solar capacity it could support and whether the investment makes sense. Start with our solar installation calculator for UK homes.
What if some tiles are already damaged?
Cracked, slipped or badly deteriorated tiles should be addressed before the panels cover that section of roof.
Installing solar panels over an existing roof problem can make future repairs more complicated because panels may need to be temporarily removed to reach the damaged area.
If your roof is approaching the end of its useful life, it may therefore make more sense to repair or replace the roof covering before installing solar panels.
Step 2: Scaffolding and Safe Roof Access Are Installed
A professional rooftop solar installation normally begins with safe access.
For a typical house, this often means scaffolding.
Energy Saving Trust says a standard solar installation typically takes around one to two days, with scaffolding sometimes erected before the installation day.
Roof work is not a suitable casual DIY project.
The Health and Safety Executive describes roof work as high risk and says it must be properly planned, with safe access, protection from roof edges and consideration of fragile surfaces.
For that reason, this guide explains how professional solar mounting works, rather than providing instructions for an inexperienced homeowner to work at height.
Step 3: Selected Roof Tiles Are Lifted
Once the array position has been determined, the installer identifies the locations where the mounting brackets will be fitted.
Selected tiles are carefully lifted or temporarily removed.
This exposes the area underneath the roof covering.
It is important to understand that installers do not normally remove every tile underneath the solar array.
Only the tiles around the required mounting points need to be accessed for a conventional on-roof installation.
This differs from an in-roof solar system, where panels or mounting trays replace part of the normal roof covering.
Step 4: Roof Hooks Are Attached to the Supporting Structure
The mounting brackets are then secured according to the mounting-system design.
This is one of the most important parts of the installation.
The purpose of the fixing is to transfer loads from the solar array into the roof structure rather than allowing those loads to sit on individual tiles.
Why does this matter?
A solar array must withstand more than its own weight.
It may experience significant forces from:
high winds
wind uplift
snow
rain
temperature changes
repeated expansion and contraction over many years
The mounting system therefore has to be engineered as part of the building rather than simply resting on the roof surface.
Do Solar Panel Roof Hooks Rest on the Tiles?
A properly selected mounting system should avoid damaging fragile roof coverings.
MCS's mounting-system standard specifically states that brackets and hooks intended for slate, clay or concrete tiles should either avoid transferring load to the roof covering or distribute any permitted load without causing damage.
That matters because a poorly positioned bracket can put pressure on a tile.
Over time, that could potentially contribute to cracking.
The exact bracket and installation method depend on the roof construction and tile profile, so installers should use components designed for the specific application.
Step 5: The Tiles Are Repositioned Around the Brackets
Once the roof hooks are securely positioned, the tiles are returned.
The bracket passes between or around the tiles while allowing the roof covering to continue shedding rainwater.
This is a critical stage because solar installation should not compromise the weather resistance of the roof.
The MCS Solar PV Installation Standard states that PV installations should not adversely affect either the structural integrity or weather tightness of the building and that these should be maintained for the life of the system.
Should installers cut roof tiles?
Some mounting systems and tile shapes can require adjustments to achieve sufficient clearance around a bracket.
However, the method depends on the mounting system, roof structure and tile type.
The important point for homeowners is that a finished tile should not be left visibly lifted or placed under inappropriate pressure simply because a mounting bracket has been added underneath it.
Step 6: Aluminium Rails Are Attached to the Roof Hooks
Once all mounting points are in place, aluminium rails are fitted to the brackets.
These rails normally run across the roof and provide the framework onto which the panels are mounted.
Before installing the modules, installers check the rail alignment.
If the rails are badly aligned, the finished solar array can appear uneven.
More importantly, the mounting system has to correspond to the engineering design used for that property and panel layout.
The number and spacing of mounting points are therefore not simply an aesthetic choice.
They depend on the roof, system design, panel dimensions, mounting manufacturer requirements and site conditions.
Why Are Solar Mounting Rails Usually Aluminium?
Aluminium has several useful characteristics for rooftop solar.
It is relatively lightweight, resistant to corrosion and suitable for long-term outdoor applications.
Keeping mounting-system weight under control is useful because solar panels already add additional permanent load to the roof.
The mounting components still need to be compatible with the rest of the installation and suitable for long-term exposure to UK weather.
Step 7: Solar Cables Are Prepared
The solar panels need electrical connections between the rooftop array and the inverter.
During installation, suitable cable routes are planned so that wiring is protected and supported.
Solar panels generate DC electricity whenever sufficient light reaches them, so the electrical side of a PV installation requires appropriate knowledge and safety procedures.
The electrical installation is subject to safety requirements, including Building Regulations requirements in England.
Homeowners should therefore treat the electrical portion of a solar PV installation differently from simple household DIY wiring.
Step 8: The Solar Panels Are Lifted Onto the Roof
Once the mounting structure has been completed, the solar modules can be placed onto the rails.
Panels are normally installed in rows according to the system design.
The installer carefully positions each module before securing it.
Solar panels have become larger over time, so safe lifting and handling are important.
Individual modern residential panels can occupy around two square metres of roof area.
That is another reason professional access equipment and multiple installers are commonly used.
If you're still deciding how many panels your property could require, see our guide:
How Many Solar Panels Do I Need in the UK?
It explains how household electricity consumption and panel output affect array size.
Step 9: Clamps Secure the Panels to the Rails
Once properly positioned, modules are secured using the mounting-system clamps.
Mid clamps sit between adjacent panels.
End clamps secure the outer edges.
Together, the clamps prevent the modules from moving while transferring loads through the rails and mounting brackets into the roof structure.
This creates one interconnected mounting system.
The final structure is therefore:
Panels → clamps → rails → brackets → roof structure
—not:
Panels → roof tiles
That distinction explains how tiled-roof solar mounting really works.
Why Is There a Gap Between Solar Panels and the Roof?
If you look at a conventional rooftop solar installation from the side, you'll normally see a gap between the panels and roof tiles.
This is intentional.
An on-roof mounting system holds the modules above the existing roof covering.
The gap also allows air to circulate behind the panels.
Solar PV modules become hot when exposed to sunlight, and photovoltaic cells generally operate less efficiently as their temperature rises.
The space also means rainwater can continue travelling down the tiled roof beneath the mounting structure.
The exact clearance varies with the mounting system and roof.
Does Installing Solar Panels Create Holes in the Roof?
The correct answer is more nuanced than simply yes or no.
A mounting system needs a secure structural connection, but professional mounting solutions are specifically designed to preserve the weather resistance of the roof.
MCS requires certified solar mounting products to demonstrate appropriate weather-tightness characteristics.
The bigger concern isn't simply whether a fixing exists.
It is whether the entire mounting detail has been designed and installed correctly.
Poor installations can potentially cause problems such as:
cracked tiles
tiles that no longer sit correctly
damaged roof coverings
water ingress
loose mounting components
A correctly installed system should maintain the roof's structural integrity and ability to resist weather.
Can Solar Panels Damage Roof Tiles?
They shouldn't when installed correctly on a suitable roof.
Problems are more likely where:
tiles were already damaged
unsuitable brackets are used
mounting components press heavily against tiles
tiles are incorrectly modified
roof structure is unsuitable
installers walk directly on fragile tiles without appropriate precautions
Clay and some older tiles can be particularly fragile.
That's why the condition of the roof should be assessed before the installation starts.
Can Solar Panels Make a Roof Leak?
A properly installed solar mounting system should not cause the roof to leak.
Both MCS mounting and installation standards specifically address weather tightness.
However, no homeowner should ignore water stains or damp appearing after a solar installation.
If a leak appears soon afterwards, contact the installer rather than assuming it is unrelated.
Taking photographs of the roof and loft before installation can also provide a useful record of the property's previous condition.
Can Solar Panels Be Installed on Clay Tiles?
Yes, solar panels can often be installed on clay-tiled roofs.
However, clay tiles may be more fragile than some concrete tiles.
The mounting system and installation technique need to suit the exact tile type.
An installer should assess the condition and profile of the tiles before choosing the mounting hardware.
Can Solar Panels Be Installed on Concrete Tiles?
Yes.
Concrete tiled roofs are very common in the UK and conventional solar mounting systems are widely available for them.
Again, the system should connect appropriately to the supporting roof structure rather than simply relying on the concrete tiles themselves.
What About Slate Roofs?
Slate roofs need a different approach.
Natural slate can be thin and brittle, so installers use mounting methods specifically designed for slate installations.
You shouldn't assume that a bracket designed for one concrete tile profile is appropriate for slate.
We'll cover this separately in our upcoming guide to solar panels on slate roofs in the UK.
What About Solar Roof Tiles?
Solar roof tiles are different from conventional solar panels mounted above a tiled roof.
Instead of sitting above existing tiles, solar tiles become part of the roof covering itself.
Energy Saving Trust notes that solar roof tiles replace normal roof tiles and may therefore make more sense during a roof renovation or new build than as a retrofit to a perfectly serviceable roof.
Conventional on-roof panels are generally much more common.
How Long Does Installation Take?
Energy Saving Trust says a typical residential solar PV system can usually be installed in around one to two days, although more complex installations can take longer.
That installation may include:
scaffolding
mounting brackets
rails
panels
inverter
electrical connections
battery storage where applicable
testing and commissioning
Scaffolding may be installed separately before the main installation date.
Can You Install Solar Panels on an Old Roof?
Potentially, but the roof's condition matters more than its age alone.
An older roof that remains structurally sound and weather-tight may still be suitable.
A younger roof with damaged timbers or badly deteriorated tiles may not be.
Remember that solar panels can remain in service for decades.
If significant roof repairs are likely in the near future, repairing the roof before installing the panels can avoid paying to remove and reinstall the solar array later.
Do You Need Planning Permission for Roof-Mounted Solar Panels?
In many cases, domestic rooftop solar panels can be installed under permitted development rights, but the exact rules depend on where in the UK your property is located and on the type of property.
In England, permitted development rules for domestic solar equipment were updated on 27 August 2026, with a transitional period running until 27 August 2027. Planning Portal notes that conditions and restrictions still apply, particularly for listed buildings, conservation areas and some other protected properties.
Scotland has its own rules. Scottish Government guidance, for example, provides separate permitted development provisions for solar PV installed on dwellings and includes restrictions for listed buildings, World Heritage Sites and conservation areas.
Therefore, don't assume that a rule quoted for England automatically applies across the entire UK.
If your home is listed, located in a conservation area or otherwise protected, check with the relevant local planning authority before installation.
Do Building Regulations Apply?
Yes, rooftop solar can involve Building Regulations requirements.
For England, Planning Portal highlights two particularly important areas:
Structural safety — the roof must be capable of carrying the additional loads.
Electrical safety — the electrical installation must comply with the applicable requirements.
This is separate from planning permission.
A project can potentially be permitted development for planning purposes while still having Building Regulations obligations.
Should You Use an MCS-Certified Installer?
For most UK homeowners considering a conventional rooftop solar system, using an MCS-certified installer is a sensible route.
MCS describes itself as the UK's quality mark for small-scale renewable technologies and sets installation and product standards alongside consumer-protection requirements.
Energy Saving Trust also recommends obtaining multiple quotations from MCS-certified installers.
This can also be important when applying for export payments or other schemes where certification requirements may apply.
What Should You Check After Installation?
Before the scaffolding disappears, look at the finished installation from the ground and ask the installer about anything that appears unusual.
Useful things to confirm include:
panels appear straight and securely aligned
no obviously broken tiles are visible
tiles around mounting points sit correctly
cables are properly supported
the inverter is operating normally
monitoring is working
system documentation has been supplied
warranties are provided
electrical certification has been completed
any required DNO paperwork has been handled
Energy Saving Trust says installers should test the system and explain how it works after installation.
Keep all documentation somewhere safe.
You'll potentially need it years later when claiming under a warranty, selling the property or modifying the solar installation.
What If You Want to Add a Battery?
Battery storage can be added to many solar systems.
The best battery size depends on how much electricity your panels produce and how much electricity your household uses when the sun isn't shining.
Before buying a battery, read our detailed guide:
What Size Solar Battery Do I Need in the UK?
If you already own an older solar system receiving Feed-in Tariff payments, you should also read our guide to adding a battery to a Feed-in Tariff solar installation before changing the system.
How Much Electricity Could Roof-Mounted Panels Produce?
Mounting is only one part of good solar system design.
The number of panels, orientation, shading and roof area also matter.
You can estimate system size, cost, electricity generation and potential savings using our:
This can help you understand whether a 3 kWp, 4 kWp, 5 kWp or larger solar array might suit your electricity consumption before requesting installer quotations.
Frequently Asked Questions
Are solar panels screwed directly into roof tiles?
Normally, no.
The structural mounting system is designed to transfer loads to the supporting roof structure rather than relying on the tiles themselves.
Roof hooks or brackets pass through or around selected areas of the tiled covering before connecting to rails supporting the panels.
Do installers remove roof tiles to fit solar panels?
Some tiles are temporarily lifted or removed to access mounting locations.
For a conventional on-roof system, the majority of the existing roof covering remains in place underneath the solar array.
Do solar panels sit directly on roof tiles?
No.
Conventional on-roof panels normally sit on mounting rails above the tiles.
What holds solar panels down in strong winds?
A properly designed combination of panel clamps, aluminium rails, roof brackets and structural fixings transfers wind forces into the building structure.
Mounting design must account for the conditions affecting the installation.
Can solar panels cause cracked tiles?
Poor installation or unsuitable mounting equipment can damage tiles.
A correctly selected and installed mounting system should minimise the risk of damage to the roof covering.
Can solar panels cause roof leaks?
A correctly installed system should maintain the weather tightness of the roof.
Leaks after installation should be investigated promptly.
Can solar panels be installed without drilling through tiles?
Conventional pitched-roof mounting systems generally access the structure underneath the roof covering, with brackets designed to pass around or beneath tiles rather than treating the tile itself as the structural mounting point.
The exact method depends on the roof and mounting system.
How far do solar panels sit above roof tiles?
There is normally a visible ventilation and mounting gap, but there is no single universal measurement.
The clearance depends on the roof profile, brackets, mounting rails and panel system.
Should I replace my roof before installing solar panels?
Not automatically.
But if substantial roof work is expected during the life of the solar system, carrying out the work first may save the cost of removing and reinstalling panels later.
The Bottom Line
Solar panels on a tiled roof are not simply screwed into the tiles.
A properly designed rooftop solar system uses mounting brackets or roof hooks to transfer loads into the roof structure.
Aluminium rails attach to those mounting points, and clamps then secure the solar modules to the rails.
The result can be summarised simply:
Roof structure → hooks → rails → clamps → solar panels
Meanwhile, the tiles continue performing their original job of protecting the building from the weather.
The quality of those hidden mounting details is just as important as the panels you can see from outside.
Before installing solar PV, make sure the condition and strength of your roof have been properly assessed and use an installer who understands the mounting system, roof covering, structural requirements and electrical regulations involved.
If you're still planning your system, your next step should be our How Many Solar Panels Do I Need in the UK? guide, followed by the UK Solar Panel Calculator to estimate system size and potential savings.
Sources & Further Reading
This article was researched using current guidance and standards published by Energy Saving Trust, MCS, Health and Safety Executive, Planning Portal, GOV.UK and the Scottish Government.
Planning and building rules differ across England, Scotland, Wales and Northern Ireland and may change over time. Always check the rules applying to your specific property before installation.
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