ROOFLANTERNREPAIRS.co.uk
0800 088 6248 Get a guide price

Roof lantern repair specialists · UK-wide

Leaking roof lantern? Find the leak. Fix the cause.

Most leaks are a failed seal, a lifted capping, blocked eaves or a kerb problem — not a failed lantern. We find where the water gets in, fix it and water-test it. Send photos for a free guide price.

Get a guide priceCall 0800 088 6248
  • Leaks, resealing, glazing bars, ridge, eaves and kerbs
  • Misted, cracked and slipped glass units replaced
  • Aluminium, uPVC and timber lanterns, vents and rooflights
  • Fixed price in writing before any work starts

Tell us about your lantern

Tell us what's happening. We reply with a guide price and the next step — the fixed price is always confirmed in writing before any work starts.

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Engineer resealing a roof lantern glazing bar on a flat roof extension Resealing a glazing bar on a rear-extension lantern
Roof lantern with one misted glass unit seen from insideMisted pane? Replace the unit, keep the lantern Where's it leaking? Tap the parts in our guide-price tool →
  • Send photos for a free guide price
  • Fixed price in writing before work starts
  • Repair first — replace only if it's worth it
  • Aluminium, uPVC and timber lanterns
  • England, Wales, Scotland and NI

Why repair first

Why choose a roof lantern repair specialist?

A roof lantern is a system of glass, bars, seals, drainage and a kerb. When it leaks, one of those has failed — and that's what we fix.

We trace the real entry point

Water travels along bars and decks before it shows. We check every detail and water-test where it isn't obvious.

Repair, not replace

Seals, gaskets, cappings, eaves and kerbs can all be repaired. A new lantern is the last resort, not the first quote.

Price in writing first

Guide price from your photos, then a fixed price in writing before any work starts. Nothing extra without your written agreement.

Every lantern type

Aluminium, uPVC, timber and orangery lanterns, plus flat rooflights and electric vents — whoever fitted them.

Lantern anatomy

Where do roof lanterns leak?

These are the seven places we check on every lantern. Tap a number to see what goes wrong there and how it's fixed.

Parts of a roof lantern1234567
  1. 1
    Ridge and hip caps
    End caps crack and seals open where several bars meet at the top.
  2. 2
    Glazing bars, cappings and gaskets
    Cappings lift and gaskets shrink, so rain runs under them and down the bar.
  3. 3
    Sealed glass units
    Unit seals fail (misting), glass cracks or slips on missing setting blocks.
  4. 4
    Eaves beam and drainage
    Leaves and moss block the drainage channel and weep slots, so it overflows inside.
  5. 5
    Upstand or kerb
    Low, rotten or uninsulated kerbs let water in under the lantern and cause condensation.
  6. 6
    Flat roof junction
    Membrane not dressed up the kerb, split or unbonded where the roof meets it.
  7. 7
    Opening vent
    Actuators, controls and vent seals fail, so it sticks open, shut or leaks.

Repairs we carry out

Which roof lantern repair do you need?

Every repair we offer, grouped by the problem. Guide prices are ex VAT; your fixed price is confirmed in writing.

Leaks and weatherproofing Find the entry point, fix it properly and test it.

Rainwater running down an internal glazing bar of a roof lantern above a kitchen
Roof lantern leak repairsLeaking roof lantern? We trace where the water gets in, repair the seal, gasket, capping or kerb, and water-test the fix.From £195 ex VATLearn more →
Sealant being applied along an anthracite aluminium roof lantern glazing bar
Roof lantern resealingResealing a roof lantern means cutting out failed sealant, cleaning back and resealing cappings, ridge and eaves with compatible materials.From £245 ex VATLearn more →
Roof lantern glazing bar with the top capping lifted to show the gasket beneath
Glazing bar and capping repairsLifted cappings, perished gaskets and loose glazing bar fixings are a common cause of roof lantern leaks.From £165 ex VATLearn more →
Ridge end cap and hip bars at the top of an anthracite aluminium roof lantern
Ridge and hip repairsThe ridge end caps and hip junctions are where roof lantern bars meet — and a common leak point.From £195 ex VATLearn more →
Wet leaves and moss being cleared from the eaves channel at the base of a roof lantern
Eaves beam and gutter repairsBlocked eaves channels and weep slots make roof lanterns overflow indoors.From £175 ex VATLearn more →
Roofer dressing EPDM membrane up the timber kerb under a roof lantern
Upstand and kerb repairsA rotten, undersized or poorly covered kerb under a roof lantern lets water in around the frame.From £395 ex VATLearn more →
Newly trimmed flat roof junction and flashing tape around a roof lantern kerb
Flat roof junction and flashing repairsLeaks where the flat roof meets the lantern kerb need the membrane, trims and flashing re-made.From £245 ex VATLearn more →

Glass, condensation and heat Misted, cracked or slipped units, and rooms that run too hot or wet.

Roof lantern seen from inside with one misted double glazed pane between clear panes
Misted glass unit replacementMisting between the panes means the glass unit's seal has failed.From £245 ex VATLearn more →
Two glaziers lifting a replacement glass unit onto a flat roof glazing frame with suction lifters
Cracked lantern glass replacementCracked or broken roof lantern glass should be made safe and replaced.From £295 ex VATLearn more →
Roof lantern glass panel slipped down past the eaves leaving a gap beneath the glazing bar
Slipped glass panel repairsHas a glass panel slipped down in your roof lantern?From £195 ex VATLearn more →
Bright open-plan living space lit by a large roof lantern with solar control glass
Solar control and self-cleaning glass upgradesRoom too hot under the lantern? Replace the glass units with solar control or self-cleaning glass and keep the frame.From £345 ex VATLearn more →
Condensation droplets on the inside of roof lantern glass on a cold morning
Condensation diagnosis and fixesWater on the inside of your roof lantern on cold mornings is usually condensation, not a leak.From £145 ex VATLearn more →

Frames, vents and finishes Aluminium, uPVC and timber lanterns, opening vents and rooflights.

Weathered painted timber roof lantern on an orangery being sanded before repainting
Timber roof lantern repairsRotten bars, failing paint and leaking beads on timber roof lanterns and orangeries.From £395 ex VATLearn more →
Slim-profile anthracite grey aluminium roof lantern on a modern flat roof extension
Aluminium roof lantern repairsRepairs for aluminium roof lanterns: cappings, gaskets, ridge, eaves, fixings, glass units and powder-coat touch-ups.From £195 ex VATLearn more →
Weathered white uPVC roof lantern on a single-storey rear extension
uPVC roof lantern repairsuPVC roof lantern leaking, discoloured or rattling?From £175 ex VATLearn more →
Open electric vent in a roof lantern with chain actuator visible from inside
Opening vent and actuator repairsElectric roof lantern vent won't open, close or seal?From £195 ex VATLearn more →
Technician spraying a roof lantern frame anthracite grey with the glass masked
Roof lantern resprayingFaded, chalky or the wrong colour? We prepare, mask and spray roof lantern frames on site in your chosen RAL colour.From £495 ex VATLearn more →
Frameless flat glass rooflight on a grey single-ply flat roof with tools nearby
Flat rooflight and skylight repairsLeaking or misted flat rooflight? We reseal, repair upstands and replace glass units on frameless and framed flat rooflights.From £195 ex VATLearn more →

Inspection, maintenance and make-safe Diagnosis, routine care and urgent temporary weatherproofing.

Surveyor on a step ladder inspecting the eaves of a roof lantern with a torch and moisture meter
Leak investigation and inspectionCan't find where your roof lantern is leaking?From £145 ex VATLearn more →
Roof lantern glass being cleaned with a water-fed pole and brush on a flat roof
Cleaning and maintenanceRegular roof lantern maintenance prevents most leaks: clear the eaves, clean the glass and frame, check seals, cappings and vents.From £95 ex VATLearn more →
Roof lantern temporarily covered with clear waterproof sheeting in the rain at dusk
Urgent leak make-safeRoof lantern pouring water or glass broken? We arrange temporary weatherproofing as soon as we can, then book the permanent repair.From £195 ex VATLearn more →

Replacement, orangeries and commercial When repair isn't the right answer, and larger or busier roofs.

Two installers lowering a new aluminium roof lantern onto a prepared timber kerb
Roof lantern replacementWhen a roof lantern is beyond economic repair we replace it — new aluminium lantern, kerb checked or rebuilt, junction re-made.From £1,995 ex VATLearn more →
Brick orangery with a large painted timber roof lantern viewed from the lawn
Orangery lantern repairsLeaking or tired orangery roof lantern? We repair timber and aluminium orangery lanterns, perimeter beams, internal gutters and glass.From £395 ex VATLearn more →
Row of aluminium roof lanterns on a commercial flat roof with walkway and edge protection
Commercial roof lantern repairsRoof lantern and rooflight repairs for offices, restaurants, schools, retail and managed buildings.From £495 ex VATLearn more →

How it works

What happens after you get in touch?

  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.

Guide prices

How much do roof lantern repairs cost?

Typical UK ranges for a standard lantern with ladder access. Towers or scaffold, larger lanterns and specialist glass add to these.

RepairGuide price (ex VAT)Inc VATBasis
Roof lantern leak repairs£195–£595£234–£714per lantern
Roof lantern resealing£245–£495£294–£594per lantern
Glazing bar and capping repairs£165–£395£198–£474per lantern
Ridge and hip repairs£195–£445£234–£534per lantern
Eaves beam and gutter repairs£175–£395£210–£474per lantern
Upstand and kerb repairs£395–£1,295£474–£1,554per lantern
Flat roof junction and flashing repairs£245–£695£294–£834per lantern
Misted glass unit replacement£245–£595£294–£714per glass unit
Cracked lantern glass replacement£295–£795£354–£954per glass unit
Slipped glass panel repairs£195–£445£234–£534per panel

See all guide prices

Reviews

How do we handle reviews?

We only publish genuine, verified reviews. Our review profiles are being set up, and reviews will appear here as customers leave them — we will never use made-up testimonials.

Had a repair from us?

We'd be grateful if you'd leave an honest review once our profiles are live. In the meantime, reply to your job email with any feedback — good or bad.

Guides

Roof lantern questions, answered

Roof lantern repair FAQs

Why is my roof lantern leaking?

Most roof lantern leaks come from a failed seal, a lifted or cracked top capping, a blocked eaves gutter or a badly sealed junction between the flat roof and the upstand. Less often the cause is a slipped glass unit, a split ridge end cap or a vent that no longer closes tightly. Water can travel along the bars before it drips, so the drip is rarely directly below the fault. Our guide why is my roof lantern leaking? walks through the usual causes.

Can you fix a roof lantern leak without replacing it?

Yes, in most cases a leaking roof lantern can be repaired without replacing it. The usual fixes are resealing, renewing gaskets, re-seating or replacing top cappings, clearing and resealing the eaves gutter, or repairing the flat roof junction at the kerb. Replacement is usually only worth considering when the frame itself is rotten, badly distorted or failing in several places at once. Our roof lantern leak repair page explains what is involved.

How much does a roof lantern repair cost?

Most roof lantern leak repairs fall between £195 and £595 ex VAT per lantern, depending on the fault, the size of the lantern and access. As a guide, resealing a standard lantern is £245 to £495, capping repairs are £165 to £395 and upstand repairs are £395 to £1,295, all ex VAT. These are guide ranges, and the fixed price is confirmed in writing before any work starts. Our prices page lists every service, and our guide to roof lantern repair cost explains what drives the figure.

Do you charge to look at a leak?

Reviewing your photos and giving a guide price is free, while a diagnostic visit is charged from £145 ex VAT. Send photos of the lantern inside and out by WhatsApp or through our quote form and we will tell you what we think is wrong. If the cause is not clear from photos, a leak investigation visit includes an inspection, water testing where needed and a written report. The fixed price is confirmed in writing before any work starts.

Do you cover my area?

Yes, we cover the whole of the UK, including England, Wales, Scotland and Northern Ireland. Islands and remote areas are covered by arrangement, and any extra travel or access costs for those are set out in your written quote. Send your postcode with your photos and we will confirm the details. You can also look up your town on our areas page.

Do I need building regulations approval to repair a roof lantern?

Like-for-like repairs such as resealing, new cappings, gaskets or a replacement glass unit do not usually need building regulations approval. Replacing a whole lantern usually counts as building work and must meet the rules where you live: the Building Regulations 2010 in England, the same regulations as applied in Wales, the Building (Scotland) Regulations 2004 in Scotland, and the Building Regulations (Northern Ireland) 2012 in Northern Ireland. Our building regulations guide covers each nation.

More questions and answers

Coverage

Where do we carry out roof lantern repairs?

Across England, Wales, Scotland and Northern Ireland. Islands and remote areas by arrangement.

England

Wales

Scotland

Northern Ireland

Send photos, get a guide price

Tell us what your lantern is doing. We reply with a guide price and the next step.

Get a guide priceCall 0800 088 6248
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