ROOFLANTERNREPAIRS.co.uk
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Kent · DA1

Roof lantern replacement in Dartford

We cover Dartford and the wider Kent area for roof lantern replacement. In short, we replace lanterns that are beyond economic repair, checking the kerb and re-making the junction — and you know the price before any work begins.

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We carry out roof lantern replacement in Dartford and across the DA1 area. We're repair-first, but some lanterns are past it: distorted frames, rot through the main bars, or most of the glass failed.

Two installers lowering a new aluminium roof lantern onto a prepared timber kerb

Is it time for roof lantern replacement?

  • Several misted or cracked units
  • Repeated leaks after previous repairs
  • Single-glazed or very poor thermal performance

Common causes we find

Age

Older lanterns can't be brought up to modern performance with repairs alone.

Structural damage

Impact or movement distorts the frame.

Covering Dartford and nearby

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.

From Maidstone to Dartford is roughly 18 miles — all part of the Kent area we cover.

If you're just outside Dartford, we also cover Bexley (3 miles), Swanley (4 miles), Welling (5 miles).

How much should it cost?

Guide price, supplied and fitted£1,995–£4,995 ex VAT£2,394–£5,994 inc VAT

Most roof lantern replacement jobs come in between £1,995 and £4,995 ex VAT (£2,394–£5,994 including VAT), supplied and fitted. 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.

Roof lantern replacement in Dartford: questions

Do you need to visit to price roof lantern replacement?

Not always. Clear photos are often enough for a guide price. Where the cause isn't obvious, a visit to inspect and water-test is charged from £145 ex VAT, confirmed before we come.

Can you repair a lantern someone else installed in Dartford?

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.

How much does a replacement roof lantern cost?

Standard sizes typically £1,995–£4,995 ex VAT supplied and fitted; bespoke sizes and kerb rebuilds are priced on survey. You get the fixed price in writing first.

Can the new lantern use the existing opening?

Usually, if the kerb is sound and the size suits a standard or made-to-measure lantern.

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