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 Dorset, 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 Dorset
Sun and UV do more damage than rain on many lanterns here: brittle ridge caps, chalky finishes and hardened gaskets. They're cheap to replace before they let water in.
Near the coast, salt in the air is hard on aluminium finishes and fixings; washing the frame occasionally and touching in chips keeps corrosion away.
What should you expect to pay for flat rooflight and skylight repairs in Dorset?
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 England?
In England, 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, so we set out the route in writing first. Listed buildings need listed building consent from the local council for alterations, and conservation areas can have extra controls; like-for-like repairs are treated differently from changes, so check with the council's conservation officer first.
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 Dorset: questions
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.
Which towns in Dorset do you cover?
All of Dorset, including Bournemouth, Poole, Weymouth, Christchurch. Rural and remote addresses are covered by arrangement.
How do I get a price for flat rooflight and skylight repairs in Dorset?
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 Dorset
- Condensation diagnosis and fixes in Dorset
- Timber roof lantern repairs in Dorset
- Aluminium roof lantern repairs in Dorset
- Opening vent and actuator repairs in Dorset
- Leak investigation and inspection in Dorset
- Commercial roof lantern repairs in Dorset
Nearby areas
- Flat rooflight and skylight repairs in Isle of Wight
- Flat rooflight and skylight repairs in Hampshire
- Flat rooflight and skylight repairs in Wiltshire
- Flat rooflight and skylight repairs in Somerset
- Flat rooflight and skylight repairs in Bristol
More about flat rooflight and skylight repairs · All roof lantern repairs in Dorset