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Greater London · SW16

Glazing bar and capping repairs in Streatham

Dealing with a lifted capping or perished gasket in Streatham (SW16)? We re-seat or replace lifted cappings, perished gaskets and loose glazing bar fixings, with a fixed price agreed in writing first.

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In Streatham, as everywhere, each glazing bar on a roof lantern has a top capping that clamps the glass onto gaskets. Send photos and we'll tell you what we think has failed.

Roof lantern glazing bar with the top capping lifted to show the gasket beneath

Signs you need glazing bar and capping repairs

  • A capping visibly higher than its neighbours
  • Gasket rubber poking out, cracked or missing
  • End caps missing at the bottom of a bar

Common causes we find

Gasket shrinkage

Rubber gaskets shrink back from the ends over time, leaving a gap at the ridge or eaves.

Damage

Ladders, window cleaning or someone stepping on a lantern can bend a capping or unclip it.

Covering Streatham 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 Streatham as part of Greater London, about 5 miles from Westminster.

If you're just outside Streatham, we also cover Mitcham (2 miles), Brixton (3 miles), Wimbledon (3 miles).

Guide prices for glazing bar and capping repairs in Streatham

Guide price, per lantern£165–£395 ex VAT£198–£474 inc VAT

Typical range: £165–£395 ex VAT, which is £198–£474 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 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.

Glazing bar and capping repairs in Streatham: questions

Can you repair a lantern someone else installed in Streatham?

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.

Which places near Streatham do you cover?

As well as Streatham, we cover nearby Mitcham, Brixton, Wimbledon, Battersea and the rest of Greater London.

Can a capping just be clipped back on?

Sometimes, if nothing underneath has failed. We check the gaskets first, because clipping a capping over a perished gasket doesn't stop the leak.

Do you repair uPVC and timber lantern bars too?

Yes. Timber lanterns use different beads and cappings, and we repair those as part of timber lantern repairs.

Other lantern repairs in Streatham

Glazing bar and capping repairs near Streatham

More about glazing bar and capping repairs · All roof lantern repairs in Streatham

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