Flat rooflights fail in the same places as lanterns: the seal to the upstand, the roof junction and the glass unit. We carry out flat rooflight and skylight repairs across Mid Glamorgan, with a guide price from your photos and a fixed price in writing before any work starts.

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
What usually causes it?
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.
Roof lanterns in Mid Glamorgan
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.
What should you expect to pay for flat rooflight and skylight repairs in Mid Glamorgan?
Typical range: £195–£595 ex VAT, which is £234–£714 with 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 Mid Glamorgan: questions
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.
Which towns in Mid Glamorgan do you cover?
All of Mid Glamorgan, including Bridgend, Rhondda, Tonypandy, Merthyr Tydfil, Pontypridd, Aberdare. Rural and remote addresses are covered by arrangement.
How do I get a price for flat rooflight and skylight repairs in Mid Glamorgan?
Send a few photos of the lantern and the problem with your postcode, by WhatsApp or the form. We reply with a guide price and confirm the fixed price in writing before any work starts.
Other repairs in Mid Glamorgan
- Ridge and hip repairs in Mid Glamorgan
- Upstand and kerb repairs in Mid Glamorgan
- Flat roof junction and flashing repairs in Mid Glamorgan
- Misted glass unit replacement in Mid Glamorgan
- Aluminium roof lantern repairs in Mid Glamorgan
- Opening vent and actuator repairs in Mid Glamorgan
Nearby areas
- Flat rooflight and skylight repairs in South Glamorgan
- Flat rooflight and skylight repairs in West Glamorgan
- Flat rooflight and skylight repairs in Gwent
- Flat rooflight and skylight repairs in Powys
- Flat rooflight and skylight repairs in Dyfed
More about flat rooflight and skylight repairs · All roof lantern repairs in Mid Glamorgan