Skylight Repair in London
A dripping skylight, misted glass or a loose frame should never be left to get worse — water finds a way in and stains spread fast. We repair and replace skylights and VELUX-type roof windows across London, with fixed prices agreed before we start.
Skylight Problems We Repair
Most skylight callouts come down to a handful of faults — and most are fixable without replacing the whole unit:
Leaking Skylights
Drips during heavy rain usually trace back to failed flashing kits, perished seals or tiles that have shifted around the frame. We trace the exact entry point and reseal or reflash it properly.
Failed Seals & Flashing Kits
Rubber gaskets harden and crack with age and UV, and the metal flashing kit that marries the window to the roof covering can work loose. We replace seals and fit the correct profile flashing kits for tile, slate or flat roofs.
Condensation Between Panes
Foggy or milky glass means the sealed unit has blown — moisture is getting in. The fix is a replacement glazed unit in the existing frame, far cheaper than a whole new window.
Draughts & Sticking Frames
Windows that whistle in the wind or jam usually have worn hinges, collapsed seals or a frame that has settled out of square. We realign, replace hardware and reseal so they close tight.
Repair vs Replacement
If the frame is sound, we repair — new seals, new glass unit, new flashing kit. If the frame is rotted through or the unit is an obsolete size, we replace it like-for-like, including VELUX-type units.
Emergency Make-Safe
Cracked skylight after a storm? We are open 24 hours — we make it watertight, then return with the right parts.
Typical 2026 London Price Bands
As a guide:
| Job | Guide price |
|---|---|
| Resealing a leaking skylight (seals & localised repair) | £180 – £350 |
| Replacing the flashing kit around the unit | £250 – £500 |
| Replacement sealed double-glazed unit in existing frame | £300 – £600 |
| Full VELUX-type skylight replacement, like-for-like | £600 – £1,200 |
Signs Your Skylight Needs Attention
Water stains on the surrounding plaster
Brown rings or bubbling paint around the reveal mean water is tracking in — and soaking the surrounding structure.
Misted or cloudy glass that will not clear
Condensation trapped between the panes is a blown sealed unit. It only gets worse, and the insulation value is gone.
Dripping only during heavy rain
Intermittent leaks point to flashing or seal failure at the roof junction — a proper inspection finds them in minutes.
Draughts or rattling in wind
A window that moves in the frame has lost its seal compression. Heat escapes, noise comes in, and rain is not far behind.
Visible gaps or cracked sealant
If you can see daylight around the frame or the mastic has split, water has an open invitation — book a repair before the next storm.
Window will not open or close properly
Worn hinges and seized mechanisms put stress on the frame and seals. Fixing the hardware early often prevents a leak later.
Why London Trusts Victoria for Skylight Repair
We are Victoria Roofing Expert Ltd — family-run from 188 Camden High St, London NW1 8QP since 1982, rated 5.0 from 338 Google reviews, and open 24 hours. Skylight work sits at the junction of roofing and glazing, and we handle both sides: the flashing and weatherproofing outside, and the sealed units, hinges and mechanisms inside. Every repair is fixed-price quoted in writing before we start, and our workmanship is fully guaranteed.
Other Roofing Services
Skylight faults often come hand in hand with other roofline issues — we can look at everything in one visit.
Areas we coverSkylight Repair FAQs
In most cases it can be repaired. Leaks are usually caused by failed seals or flashing kits, both of which we can renew without touching the rest of the window. We only recommend full replacement when the frame is rotted through or the unit is an obsolete size — and we will show you why before you spend a penny.
As a 2026 guide: resealing a leaking unit runs £180–£350, replacing the flashing kit £250–£500, and a replacement sealed glass unit £300–£600. A full like-for-like VELUX-type replacement is typically £600–£1,200. Your exact price is fixed in writing after a free inspection.
Yes — genuine VELUX units and the many compatible brands fitted across London homes. We replace sealed glass units, handles, hinges, ventilation flaps and flashing kits, and we fit new like-for-like windows into existing roof openings when repair is not enough. Parts are matched to the unit's size code.
That misting means the sealed unit has blown and the insulating gas has escaped — it will not clear on its own and the window is now losing heat. The good news is you usually only need a replacement glazed unit fitted into the existing frame, not a whole new window. Call 07848 256099 or request a free quote and we will measure up and give you a fixed price.