Velux & Skylight Repair Dublin
Why a "New" Skylight Sometimes Leaks Worse Than the Old One
The single most common skylight problem we see isn't a cracked pane or a worn-out unit — it's a flashing kit that doesn't match the roof it's fitted to.
Slate, tile, and flat roofs each need a different flashing profile around a Velux window, and fitting the wrong kit, or fitting the right kit badly, creates exactly the "new roof, new leak" scenario that gives skylights a bad reputation they don't actually deserve.
The window itself is rarely the failure point; the junction where it meets the surrounding roof covering almost always is.
Most genuine skylight issues come down to degraded seals or hinges that no longer close tightly, which lets heat escape in winter and gives water a way in during heavy rain.
Neither of those is usually a reason to replace the whole unit — they're a repair, and treating them as one saves you the cost of a full replacement you don't actually need.
Skylight Repair, Reseal, or Full Replacement?
If the glazing unit itself is sound and the problem is a failed seal, worn hinge, or damaged flashing, a repair is the right call and a fraction of the cost of full replacement.
Full replacement makes more sense where the unit is genuinely old (Velux units can last 20-30 years when properly installed and maintained, so age alone isn't usually the deciding factor), the glazing has failed internally (visible misting between panes means the seal's gone and can't be repaired), or the frame itself has degraded beyond a straightforward fix.
Augustine will tell you honestly which situation applies rather than defaulting to a full replacement when a repair would genuinely do the job.
What Dublin Homeowners Say About Us
Get the Actual Leak Point Fixed, Not the Window Replaced Unnecessarily
What a Skylight Job Actually Involves
Every callout starts with identifying whether the leak is coming from the flashing, the seals, or the glazing itself, since each has a different fix and a very different cost.
If it's flashing-related — the most common cause by far — the existing kit is removed and replaced with one properly matched to your roof covering, dressed correctly into the surrounding slate, tile, or membrane rather than sealed over the top with mastic, which is a shortcut that fails within a couple of winters.
Where structural reinforcement is needed, typically on older homes where rafters were cut for the original opening, this gets identified and priced before work proceeds, not discovered halfway through.
Areas We Cover Across Dublin
AD Roofing covers all of Dublin, with particularly deep experience across the South Dublin coastal and suburban belt. This isn't a padded list built to catch every possible search term — every area named here is somewhere we've genuinely worked.
South Dublin: Dún Laoghaire, Blackrock, Dalkey, Killiney, Foxrock, Stillorgan, Sandyford, Cabinteely, Monkstown, Sallynoggin, Deansgrange, Dundrum, Rathfarnham, Ballinteer, Knocklyon, Terenure, Rathmines, Ranelagh, Donnybrook, Sandymount
North Dublin: Malahide, Howth, Clontarf, Sutton, Portmarnock, Raheny, Swords, Fairview, Donnycarney, Killester, Artane, Coolock, Santry, Glasnevin, Drumcondra
West & Southwest Dublin: Lucan, Castleknock, Blanchardstown, Clondalkin, Tallaght, Rathcoole
Don't see your area listed? Call anyway — we cover greater Dublin as standard and will tell you honestly whether your job is a fit before you book anything in.
Photos Of Our Recent Roofing Jobs
Skylight Repair Frequently Asked Questions
Why did my skylight start leaking again after I already had it fixed once?
Almost always because the flashing kit used wasn't correctly matched to your roof covering, or was sealed with mastic instead of properly dressed in. We check this specifically rather than assuming a repeat leak is just bad luck.
Do I need a full new skylight, or can mine be repaired?
If the glazing unit is sound and the issue is a seal, hinge, or flashing problem, a repair is almost always the right call. Full replacement is worth it if the glazing has misted internally (seal failure that can't be repaired) or the frame has genuinely degraded.
How long do Velux skylights actually last?
Properly installed and maintained, 20-30 years is realistic — so if yours is leaking well before that, it's very likely an installation or flashing issue rather than the window simply reaching end of life.
Is a leaking skylight an emergency?
If water is actively coming through, yes — treat it as one. Augustine's available 24/7 for emergency callouts, and the inspection is free regardless of the time you call.
Can you match the flashing kit to my specific roof, or is it one-size-fits-all?
It's not one-size-fits-all, and that's exactly the mistake that causes most skylight leaks. We fit the flashing kit designed for your actual roof covering — slate, tile, or flat — rather than whichever kit happens to be on hand.
Do I need extra structural work if my house is older?
Sometimes — older homes occasionally need reinforcement where roof rafters were cut for the original skylight opening. This gets identified and priced during inspection, never added as a surprise once work's underway.
Any Questions?
Ask Us
What Skylight & Velux Work Costs in Dublin
| Job Type | Typical Cost |
|---|---|
| Flashing repair (existing window, correct kit fitted) | €250 – €500 |
| Seal or hinge repair | €150 – €350 |
| Glazing unit replacement (misted/cracked, frame reused) | €300 – €700 |
| New Velux supply & fit, standard size | €600 – €900 |
| New Velux supply & fit, larger/upgraded glazing | €900 – €1,800 |
| Blinds/shading add-on | €100 – €300 |
| Structural reinforcement (older homes, cut rafters) | €500 – €1,000 |
The flashing kit and roof type drive the price more than the window itself — matching the correct kit to slate, tile, or flat roofing is what determines whether this is a one-time job or a repeat callout in two years.
Additional Roofing Services We Offer
