Skylight repairs & leak fixes for Bangor, Gwynedd: the essentials
We handle skylight repairs & leak fixes across Gwynedd, including Bangor, Gwynedd. 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. Skylight repairs & leak fixes suit leaks, condensation, misted units and failed actuators.
We cover all of Bangor, Gwynedd and the LL57 district, and nearby Llangefni and Caernarfon.
Specification options
- Actuator, motor and control repairs
- Condensation diagnosis
- Planned maintenance visits
- Resealing and re-flashing
- Upstand and membrane repairs
- Actuator and rain-sensor repairs
- Seal and flashing repairs
What to check first
- Water tracking can show up far from the source
- Parts availability varies with the age of the unit
Planning, building control and Bangor, Gwynedd
In Wales a rooflight on a house is usually permitted development if it stands no more than 15 cm proud of the roof, except on protected land such as conservation areas and National Parks, where permission is needed. 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.
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. 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.
What do skylight repairs & leak fixes cost in Bangor, Gwynedd?
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| 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 |
What happens next
- Send the details. Postcode, rough size and a photo of the roof and room.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Agree the quote. You approve the specification and price before anything is ordered.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Nearby towns
Other services in Bangor, Gwynedd
Questions about skylight repairs & leak fixes in Bangor, Gwynedd
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.
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.
How do I book a survey in Bangor, Gwynedd?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
Do I need to be at home for the survey in Bangor, Gwynedd?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
