Skylight leak repair in Cardiff
Fixing leaks around skylights — usually flashing or seal failure rather than the glass unit itself.
Wales · updated 2026-04-11 · 0 local roofers in directory
Typical cost in Cardiff
£200–£900
Mid-market: £450. Ranges are indicative; real quotes vary with scope, access, and materials.
See the full UK roofing cost guide for the methodology and the factors that move a quote up or down.
What the job involves
Skylight leaks are almost always a flashing or seal problem, not a failure of the glass unit itself. The most common failure points are the lead flashing around the kerb, the EPDM or foam gaskets where the frame meets the glazing, and the tile-to-frame junctions on the weather side.
A good repair identifies which of those is failing and fixes just that — swapping a whole skylight unit is rarely necessary unless the frame itself has rotted or the glazing has failed.
Cardiff — local context
Traditional material: Welsh slate (locally quarried) on Victorian terraces.
Pontcanna, Cathays and Roath contain dense Victorian terrace stock with original Welsh slate; the material is local to Wales and typically specified on heritage re-roofs.
What changes the price
- Which part has failed — flashing is cheapest, gasket replacement is moderate, frame replacement is the most expensive.
- Skylight brand and model — Velux parts are the most available in the UK.
- Access, especially on high-pitch or dormer installations.
- Whether the surrounding roof covering needs disturbing to do the fix.
Timeline: Usually 2–4 hours on site for a flashing or seal repair.
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Start my quote requestCommon questions
Is the leak through the glass itself?
Almost never. Modern double and triple glazed skylight units don’t leak through the glass. If you see water on the inside of the unit it’s either condensation (a ventilation issue) or water tracking in through a failed seal or flashing.
Can I replace just the flashing without removing the whole skylight?
Usually yes, for most Velux-style skylights. The flashing kit comes off independently of the glazed unit. An experienced roofer can do this without disturbing the main skylight.
What does skylight leak repair typically cost in Cardiff?
A typical skylight leak repair job in Cardiff falls in the £200–£900 range, with the middle of the market around £450. Cardiff’s labour and access factor (1.00× the national baseline) means prices run at the UK average. Actual quotes vary with access, materials, and specifics of the job.
Are there any Cardiff-specific things that affect price?
Pontcanna, Cathays and Roath contain dense Victorian terrace stock with original Welsh slate; the material is local to Wales and typically specified on heritage re-roofs.
How many roofers serve Cardiff through this site?
Our directory is still being built out for Cardiff. You can still submit a quote request — it will be held for matching once local roofers are onboarded.
Related guides
- How to hire a roofer without getting done
Companies House checks, insurance, trade bodies, contracts, and the Consumer Rights Act.
- What a roof repair should actually cost
Real 2026 UK price ranges by job, and what drives the variance.
- Reading a roof from the ground
Eight checks you can do before phoning anyone.
- All roofers in Cardiff
The full directory view for Cardiff, across every service.
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