How we approach skylight repairs & leak fixes in Caernarfon
We handle skylight repairs & leak fixes across Gwynedd, including Caernarfon. In short: leak tracing, resealing, actuator repairs and glass replacement. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
Welsh planning rules exclude rooflights from permitted development in conservation areas and National Parks, so we check the designation before quoting. In Caernarfon, as anywhere, skylight repairs & leak fixes are the usual choice for rooflights that have stopped opening or started dripping.
Caernarfon sits about 13 km from Llangefni and 13 km from Bangor, Gwynedd, and we cover the whole LL55 postcode district and the roads in between.
What you can choose
- Resealing and re-flashing
- Upstand and membrane repairs
- Actuator, motor and control repairs
- Glass unit replacement
- Condensation diagnosis
- Leak tracing, not guesswork
- Actuator and rain-sensor repairs
Things we check at survey
- Water tracking can show up far from the source
- Repairs are charged — the free survey applies to new installations
Planning and building rules for Caernarfon
Planning rules in Wales are tighter than in England for rooflights: Class C rights do not apply in conservation areas, National Parks or AONBs, so a rooflight there needs planning permission. A side-facing rooflight within 10.5 m of the boundary must be obscure-glazed, and non-opening unless the opening part is more than 1.7 m above the floor.
In Wales the limiting values are 2.2 W/m²K for a rooflight and 1.4 W/m²K (or WER Band B) for a roof window in an existing house. A revised Welsh Approved Document L takes effect on 4 March 2027; rooflights in new dwellings stay at 2.2 W/m²K.
See our building regulations guide for U-values, glazing limits and self-certification.
Skylight repairs & leak fixes prices in Caernarfon
These are typical supply-and-fit ranges. For an address in Caernarfon, 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 |
The process, step by step
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Caernarfon address.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Skylight repairs & leak fixes near Caernarfon
Related work in Caernarfon
Skylight repairs & leak fixes in Caernarfon: questions
Do you repair roof windows too?
Yes — flashings, seals, hinges and glass on pitched roof windows.
Do you charge for repair visits?
Yes, repairs are charged. We give the price before the visit.
Is it condensation or a leak?
Condensation forms on the inside face on cold days and comes back in the same pattern. A leak appears when it rains and often tracks down the reveal.
How do I book a survey in Caernarfon?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
Can you work alongside my builder in Caernarfon?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
