In Merthyr Tydfil, as everywhere, resealing is the planned, whole-lantern version of a leak repair: we cut out the old, failed sealant, clean every joint back to a sound surface and reseal the cappings, ridge and eaves with materials that suit the frame. Send photos and we'll tell you what we think has failed.
Signs you need roof lantern resealing
- Black mould or dirt lines trapped in old silicone
- Several small leaks rather than one obvious one
- A lantern that is 8–15 years old and has never been maintained
What usually causes it?
Wrong product used
General-purpose or acetoxy silicone can fail early on some frames and coatings. Glazing joints need a low-modulus, compatible sealant.
Patch over patch
Fresh sealant run over old, dirty sealant rarely bonds. It looks fixed for a season and then lets go.
Covering Merthyr Tydfil and nearby
Western and upland parts of the UK get more rain and more wind-driven rain than the east, and that's what finds weak cappings and blocked eaves first. Lanterns here benefit from a check of the bars on the most exposed face and a clear eaves channel before winter.
We cover Merthyr Tydfil as part of Mid Glamorgan, about 19 miles from Bridgend.
Neighbouring places we cover include Aberdare (4 miles), Tredegar (6 miles), Rhondda (7 miles).
What should you expect to pay in Merthyr Tydfil?
Most roof lantern resealing jobs come in between £245 and £495 ex VAT (£294–£594 including VAT), per lantern. 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.
Roof lantern resealing in Merthyr Tydfil: questions
Do you cover Merthyr Tydfil?
Yes. We cover Merthyr Tydfil, including the CF47 postcode area, as part of Mid Glamorgan. Send photos by WhatsApp or the form for a free guide price, and we'll confirm the fixed price in writing before any work starts.
How do I get a price for roof lantern resealing in Merthyr Tydfil?
Send a few photos of the lantern and the problem, with your Merthyr Tydfil postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Can you match the colour of my frame?
We use sealants in common frame colours such as anthracite grey, black and white, and match as closely as the range allows.
How long does resealing take?
Most domestic lanterns take a few hours in dry weather.
Other lantern repairs in Merthyr Tydfil
- Roof lantern leak repairs in Merthyr Tydfil
- Ridge and hip repairs in Merthyr Tydfil
- Flat roof junction and flashing repairs in Merthyr Tydfil
- Timber roof lantern repairs in Merthyr Tydfil
- Opening vent and actuator repairs in Merthyr Tydfil
- Leak investigation and inspection in Merthyr Tydfil
Roof lantern resealing near Merthyr Tydfil
More about roof lantern resealing · All roof lantern repairs in Merthyr Tydfil