Skylight repairs & leak fixes for Cardiff: the essentials
Skylight repairs & leak fixes in Cardiff means leak tracing, resealing, actuator repairs and glass replacement. We cover the CF10 district and the rest of South Glamorgan, with a survey before any price is fixed.
Wales sees a lot of wind-driven rain, particularly in the west, so upstand height and flashing laps matter more than anywhere. In Cardiff, as anywhere, skylight repairs & leak fixes are the usual choice for rooflights that have stopped opening or started dripping.
We cover all of Cardiff and the CF10 district, and nearby Penarth and Dinas Powys.
Choices for your Cardiff project
- Resealing and re-flashing
- Actuator, motor and control repairs
- Upstand and membrane repairs
- Condensation diagnosis
- Glass unit replacement
- Honest repair-or-replace advice
- Seal and flashing repairs
What to check first
- Parts availability varies with the age of the unit
- Water tracking can show up far from the source
Consents for skylight repairs & leak fixes in Cardiff
Welsh householder permitted development (Class C) allows rooflights that project no more than 15 cm and sit no higher than the existing roof — but not in conservation areas, National Parks, AONBs or World Heritage Sites. Listed buildings need listed building consent from the council, and flats have no householder permitted development rights.
Approved Document L in Wales (2022 edition) sets 2.2 W/m²K for rooflights, measured horizontally, and 1.4 W/m²K or Band B for roof windows in existing homes. Wales also has its own overheating rules (Part O) for new homes, in force since November 2022.
Read the planning permission guide before you commit to a design.
Guide prices for Cardiff
These are typical supply-and-fit ranges. For an address in Cardiff, scaffold, a hoist for heavy glass, or a new structural opening can move the figure, which is why we survey first.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Glass unit or actuator replacement | £595 – £1,555 | £495 – £1,295 |
| Upstand or membrane repair Typical | £355 – £955 | £295 – £795 |
| Diagnostic visit and reseal | £235 – £475 | £195 – £395 |
From enquiry to finished job
- Tell us what you have. Send the CF10 postcode, a rough size and a couple of photos.
- Measure and check. A surveyor visits Cardiff, measures and checks structure and access.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Nearby towns
Related work in Cardiff
Common questions
Can you fix a misted rooflight?
A misted unit means the glass seal has failed. The sealed unit, or the whole rooflight, needs replacing.
Do you repair roof windows too?
Yes — flashings, seals, hinges and glass on pitched roof windows.
Why is my skylight leaking?
Common causes are a failed seal, a membrane that has split or lifted at the upstand, a low upstand, blocked drainage or condensation mistaken for a leak.
Can you work alongside my builder in Cardiff?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
How do I book a survey in Cardiff?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
