In Chepstow, as everywhere, flat rooflights fail in the same places as lanterns: the seal to the upstand, the roof junction and the glass unit. Send photos and we'll tell you what we think has failed.

Signs you need flat rooflight and skylight repairs
- Water around the rooflight edge
- Ponding on the glass (not enough fall)
- Cracked sealant or a lifted membrane at the upstand
Why it happens
Upstand detail
As with lanterns, the membrane must be dressed up and sealed.
Unit failure
Edge seals fail and the unit mists.
Roof lanterns in Chepstow
Damp, mild winters keep moss and algae growing on flat roofs and lantern frames, which holds water against seals and blocks weep slots. Regular clearing makes a real difference in wetter areas.
We cover Chepstow as part of Gwent, about 14 miles from Newport, Gwent.
Neighbouring places we cover include Monmouth (12 miles), Newport, Gwent (14 miles), Cwmbran (15 miles).
What should you expect to pay in Chepstow?
Most flat rooflight and skylight repairs jobs come in between £195 and £595 ex VAT (£234–£714 including VAT), per rooflight. Towers or scaffold, where needed, are priced into the quote. Your fixed price is confirmed in writing before any work starts.
Do you need permission in Wales?
In Wales, like-for-like repairs to a roof lantern don't usually involve building control. A full replacement or a bigger opening is controlled under the Building Regulations 2010 (as applied in Wales), so we set out the route in writing first. Listed buildings in Wales need listed building consent from the local planning authority for alterations, with Cadw guidance on historic buildings; check with the council before changing a lantern on a listed property.
How does it work?
- Send photosWhatsApp or upload a few photos and tell us when it leaks.
- Guide priceWe reply with a guide price and whether a visit is needed.
- Fixed price in writingYou approve the price and the date before anything starts.
- Repair and testWe fix what's failed, water-test where it matters, and send photos.
Flat rooflight and skylight repairs in Chepstow: questions
How do I get a price for flat rooflight and skylight repairs in Chepstow?
Send a few photos of the lantern and the problem, with your Chepstow postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Which places near Chepstow do you cover?
As well as Chepstow, we cover nearby Monmouth, Newport, Gwent, Cwmbran, Pontypool and the rest of Gwent.
What does a flat rooflight repair cost?
Usually £195–£595 ex VAT, confirmed in writing before work starts.
Can you fix a Velux-style roof window?
Our focus is flat rooflights and lanterns; pitched roof windows are a different trade and we'll say so if that's what you have.
Other lantern repairs in Chepstow
- Solar control and self-cleaning glass upgrades in Chepstow
- Timber roof lantern repairs in Chepstow
- uPVC roof lantern repairs in Chepstow
- Leak investigation and inspection in Chepstow
- Cleaning and maintenance in Chepstow
- Commercial roof lantern repairs in Chepstow
Flat rooflight and skylight repairs near Chepstow
More about flat rooflight and skylight repairs · All roof lantern repairs in Chepstow