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Gwynedd · LL49

uPVC roof lantern repairs in Porthmadog

Dealing with a tired uPVC lantern in Porthmadog (LL49)? We replace brittle end caps, cappings and gaskets and reseal uPVC lanterns, with a fixed price agreed in writing first.

Get a guide priceCall 0800 088 6248

Many uPVC roof lanterns have an aluminium core with uPVC cladding and cappings. Send photos from Porthmadog (LL49) and we'll tell you which it is — with the price agreed in writing before any work.

Weathered white uPVC roof lantern on a single-storey rear extension

Signs you need uPVC roof lantern repairs

  • Yellowed or brittle end caps
  • Green algae along the bars
  • Rattling or whistling in wind

Why it happens

UV ageing

uPVC components become brittle and crack after years of sun.

Blocked drainage

As with all lanterns, blocked eaves drainage causes overflow.

Covering Porthmadog 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.

Coastal wind drives rain hard against lanterns, so cappings and ridge seals on the seaward face take the most punishment.

Porthmadog is around 21 miles from Bangor, Gwynedd, and both are within our Gwynedd coverage.

If you're just outside Porthmadog, we also cover Pwllheli (12 miles), Caernarfon (16 miles), Dolgellau (16 miles).

What should you expect to pay in Porthmadog?

Guide price, per lantern£175–£595 ex VAT£210–£714 inc VAT

Typical range: £175–£595 ex VAT, which is £210–£714 with 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?

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?

  1. Send photosWhatsApp or upload a few photos and tell us when it leaks.
  2. Guide priceWe reply with a guide price and whether a visit is needed.
  3. Fixed price in writingYou approve the price and the date before anything starts.
  4. Repair and testWe fix what's failed, water-test where it matters, and send photos.

uPVC roof lantern repairs in Porthmadog: questions

Do you cover Porthmadog?

Yes. We cover Porthmadog, including the LL49 postcode area, as part of Gwynedd. 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.

Can you repair a lantern someone else installed in Porthmadog?

Yes. We repair lanterns whoever fitted them. If yours is still under the installer's warranty, contact them first so you don't affect it.

What does a uPVC lantern repair cost?

Usually £175–£595 ex VAT per lantern, confirmed in writing before work starts.

Can you change my uPVC lantern's colour?

Yes, with a respray suitable for uPVC.

Other lantern repairs in Porthmadog

uPVC roof lantern repairs near Porthmadog

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