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Greater London · SM5

uPVC roof lantern repairs in Carshalton

We cover Carshalton and the wider Greater London area for uPVC roof lantern repairs. In short, we replace brittle end caps, cappings and gaskets and reseal uPVC lanterns — and you know the price before any work begins.

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We carry out uPVC roof lantern repairs in Carshalton and across the SM5 area. Many uPVC roof lanterns have an aluminium core with uPVC cladding and cappings.

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

What you might be seeing

  • Yellowed or brittle end caps
  • Green algae along the bars
  • Leaks at the ridge or eaves

What usually causes it?

Clip failure

Clip-on cappings can lose their grip and lift.

Blocked drainage

As with all lanterns, blocked eaves drainage causes overflow.

Covering Carshalton and nearby

Drier, sunnier parts of the UK are kinder to seals than the wet west, but strong sun ages sealant, gaskets and plastic end caps, and south- or west-facing lanterns can make rooms very warm. Solar control glass and an opening vent help.

Across London, many lanterns sit on rear extensions with access only through the house, so we protect floors and plan the work to keep time indoors to a minimum. Parking and any permits are factored into the quote.

We cover Carshalton as part of Greater London, about 9 miles from Westminster.

Neighbouring places we cover include Wallington (1 mile), Sutton (2 miles), Mitcham (2 miles).

What should you expect to pay in Carshalton?

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

Guide price for uPVC roof lantern repairs: £175–£595 ex VAT (£210–£714 inc 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 England?

Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in England. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations 2010; we confirm in writing which route applies before any replacement. 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?

  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 Carshalton: questions

How do I get a price for uPVC roof lantern repairs in Carshalton?

Send a few photos of the lantern and the problem, with your Carshalton postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.

Can you repair a lantern someone else installed in Carshalton?

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.

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