We carry out flat rooflight and skylight repairs in Cowbridge and across the CF71 area. Flat rooflights fail in the same places as lanterns: the seal to the upstand, the roof junction and the glass unit.

What you might be seeing
- Water around the rooflight edge
- Misted glass
- Cracked sealant or a lifted membrane at the upstand
Why it happens
No fall
Flat glass needs a slight fall to shed water; ponding stresses seals.
Upstand detail
As with lanterns, the membrane must be dressed up and sealed.
Covering Cowbridge and nearby
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.
Cowbridge is around 11 miles from Cardiff, and both are within our South Glamorgan coverage.
Neighbouring places we cover include Llantwit Major (4 miles), Bridgend (7 miles), Barry (8 miles).
Guide prices for flat rooflight and skylight repairs in Cowbridge
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?
Most lantern repairs in Wales need no approval at all. Where a job turns into a replacement, the Building Regulations 2010 (as applied in Wales) apply and we confirm how the work will be signed off before we start. 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 Cowbridge: questions
How do I get a price for flat rooflight and skylight repairs in Cowbridge?
Send a few photos of the lantern and the problem, with your Cowbridge postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Do you need to visit to price flat rooflight and skylight repairs?
Not always. Clear photos are often enough for a guide price. Where the cause isn't obvious, a visit to inspect and water-test is charged from £145 ex VAT, confirmed before we come.
Do you replace walk-on rooflight glass?
Walk-on glass is a specialist structural unit; we can measure and specify a replacement from the right manufacturer.
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 Cowbridge
- Glazing bar and capping repairs in Cowbridge
- Eaves beam and gutter repairs in Cowbridge
- Roof lantern respraying in Cowbridge
- Leak investigation and inspection in Cowbridge
- Urgent leak make-safe in Cowbridge
- Roof lantern replacement in Cowbridge
Flat rooflight and skylight repairs near Cowbridge
More about flat rooflight and skylight repairs · All roof lantern repairs in Cowbridge