Solar panels work well on tile roofs and it’s the single most common roof type UK installers fit them to, but the tile type you have – concrete, clay, or interlocking – determines exactly which mounting method and hardware your installer should use. Getting this detail right matters more on tiled roofs than most other roof types, because the mounting process involves lifting or drilling into individual tiles rather than clamping directly to an exposed structural surface.
How Solar Panels Are Actually Mounted on Tiled Roofs
Most tile roof installations use a hook-and-rail system: roof hooks are fitted under selected tiles, anchored directly into the rafters below, and horizontal mounting rails are then attached to those hooks, with panels clamped onto the rails. This method avoids drilling through tiles themselves for the panel fixings, though the tiles the hooks pass under are usually lifted, sometimes trimmed slightly, and occasionally need replacing if they crack during the process.
How Different Tile Types Change the Installation
| Tile type | Installation consideration |
|---|---|
| Concrete interlocking tiles | Generally the most straightforward – robust, widely compatible with standard hook systems |
| Plain clay tiles | More brittle, higher chance of breakage during hook fitting, often needs slower, more careful work |
| Pantile/clay interlocking | Profile shape can require specific hook designs to seat correctly |
| Reclaimed/heritage tiles | May be harder to source exact replacements if any crack, worth confirming stock before starting |
Checking Structural Suitability Before Installation
A competent installer should check your roof’s rafter spacing, timber condition, and overall structural capacity before confirming a tile roof is suitable, since hooks need to anchor into sound rafters rather than just the tile battens. Older properties with roofs that haven’t been inspected in some time occasionally reveal rot or undersized rafters during this check, which needs addressing before installation rather than after – see our broader guide on whether your roof is suitable for solar panels for the full structural checklist.
Weatherproofing Around the Fixing Points
A properly fitted hook system shouldn’t compromise your roof’s weatherproofing – hooks are designed to sit under the tile’s natural overlap, maintaining the water-shedding path the tiles create. Poor workmanship (hooks fitted at the wrong angle, or tiles reset incorrectly afterwards) is a far more common cause of leaks than the hook-and-rail method itself, which is why installer competency matters more on tile roofs than almost any other roof type.
Does a Tile Roof Cost More to Install Solar On?
Tile roof installations are generally priced similarly to other pitched roof types for standard domestic systems, though jobs involving fragile clay tiles, awkward tile profiles, or a higher-than-usual number of cracked tile replacements can take longer and cost slightly more in labour. Always ask your installer directly whether they anticipate any tile-specific complications during the initial survey rather than after work has started.
Frequently Asked Questions About Solar Panels on a Tile Roof
Do roof tiles need to be removed to install solar panels?
The tiles directly above each mounting hook are typically lifted temporarily and reset afterwards, rather than permanently removed. A small number may need trimming to fit around the hook, and any that crack during the process are replaced – a competent installer accounts for a small margin of breakage in their quote.
Are clay tile roofs harder to fit solar panels on than concrete tile roofs?
Generally yes – clay tiles are more brittle and prone to cracking during hook installation, which can mean slower, more careful work and a higher chance of needing replacement tiles. It’s not a reason to avoid solar on a clay tile roof, just something to flag with your installer so they price and plan for it appropriately.
Can solar panels cause a tile roof to leak?
Properly installed hook systems shouldn’t cause leaks, since hooks are designed to sit within the tile’s existing overlap and water-shedding path. Leaks linked to solar installations are almost always down to poor workmanship – incorrectly seated hooks or badly reset tiles – rather than an inherent flaw in mounting panels on tiles.
How long does a solar panel installation take on a tile roof?
A typical domestic tile roof installation takes 1-2 days for the panels and mounting, similar to other pitched roof types, though roofs needing significant tile replacement or found to have structural issues during survey can take longer.
