# Skylight leaking: is it the skylight or the roof? (2026)

> Skylight leaking? A torch test shows if it's the skylight, the flashing around it or condensation, who to call for each, and what the fix costs in 2026.

Canonical: https://rnrroofrestorations.com.au/blog/skylight-leaking
Last updated: 2026-11-02

**A leaking skylight is usually leaking around the skylight, not through it. If water appears only when it rains, runs down the light shaft from the top, or stains the ceiling on the uphill side, the fault is most likely the flashing or the roof around the opening, and a roofer is the right call. If the dome is cracked or cloudy, a frame seal has split, or droplets form across the inside on dry or humid days, it's the skylight unit or condensation, and that's a job for a skylight specialist.**

It always seems to start on the wettest night of the year. A drip lands on the kitchen bench, right under the skylight that was meant to be the best thing about the room, and by morning there's a tea-coloured ring on the plaster around it. You stand there holding a tea towel, staring up at a square of grey sky, asking the only question that matters: who do I even call?

Get that wrong and you pay twice. A skylight company reseals a dome that was never the problem, or a roofer patches the tiles while a split frame seal keeps dripping onto your bench.

We're R&R Restorations, owner-operated by Alex Rowe. We repair and restore concrete tile, terracotta and Colorbond roofs across the Gold Coast, Brisbane and Logan, and the Tweed and Northern Rivers, and the roof around a skylight is our work: the flashings, the tiles or sheets above it, and the path rain takes past the opening. Our [roof leak repairs](/services/roof-leak-repairs-gold-coast) start by finding where the water gets in, and a focused repair is commonly $350 to $1,500. If the fault turns out to be in the skylight unit itself, we'll tell you, so your money goes to the right trade. Our customers rate us 5.0 from 10 Google reviews.

## In summary

- **Water only in rain, coming from the top of the shaft or the uphill side:** usually the flashing or the roof around the skylight. Call a roofer.
- **Cracked, crazed or yellowed dome, or a perished seal you can see:** the skylight unit. Call a skylight specialist.
- **Fog or droplets spread across the inside of the dome on dry, humid or cool mornings:** condensation. Fix the ventilation, not the roof.
- **Skylight fitted in the last few years:** call the installer first, because the fault may be in their work.
- **What it costs:** roof repairs around a skylight are commonly $350 to $1,500 with us; resealing a skylight typically runs $200 to $500 and new glazing $600 to $1,500 (Vivid Skylights, May 2025).

## How do you know if it's the skylight or the roof that's leaking?

Check three things: when the water appears, where it first shows inside, and what you can see from the ground. A leak that only happens in rain and starts at the top of the light shaft, or on the ceiling on the uphill side (towards the roof's peak), points to the flashing or the roof. Damage you can see on the dome or frame points to the unit. Water on dry days points to condensation.

The light shaft is the boxed-in tunnel between your ceiling and the hole in the roof. It's the best clue you have, because it shows you where the water starts its trip.

**The torch test.** During rain, or within an hour of it, stand under the skylight and shine a torch up the shaft. Look for where the water first appears:

- **Wet streaks running down the shaft walls from the top edge.** Water is getting in at the roof opening, around the outside of the skylight. That's the flashing or the roofing beside it.
- **Water coming from one corner, where the dome meets its frame.** That's either a frame seal or the flashing at that corner. Someone needs to look at both from the roof.
- **Fine droplets spread evenly across the inside of the dome or the ceiling diffuser.** That's condensation, especially if it's there on a dry morning.
- **A damp patch on the ceiling a metre or more from the skylight.** That's usually the roof higher up. Water that gets in near the ridge runs down the sarking (the membrane under the roof covering) or the framing, and drops out at the first gap it finds. A skylight shaft is a gap, so it often takes the blame for a cracked tile two metres away.

Then match what you've seen to the table.

| What you notice | Most likely cause | Who to call | Do we fix it? |
|---|---|---|---|
| Drips only in rain, streaks from the top of the shaft | Flashing around the skylight, or tiles or sheets just above it | A roofer | Yes |
| Leaks only when wind drives rain from one direction | A side flashing, or lifted tiles or sheets on that side | A roofer | Yes |
| Stain on the ceiling uphill of the skylight, or well away from it | A cracked tile, failed ridge cap, blocked valley or rusted screws higher up | A roofer | Yes |
| Leak started after solar, air-conditioning or antenna work | Tiles cracked or flashing disturbed by foot traffic around the skylight | A roofer, and tell the trade who was up there | Yes |
| Leak started after hail | A cracked dome, broken tiles, or both | Both: a roofer for the roof, a skylight specialist for the dome | The roof side, yes |
| Dome is cracked, crazed, cloudy or yellowed | The glazing has failed | A skylight specialist | No |
| Rubber seals between dome and frame are perished or loose | The unit's seals or gaskets | A skylight specialist | No |
| Droplets across the inside on dry days, often over a bathroom or kitchen | Condensation | A skylight specialist or an electrician for an exhaust fan | No |
| Skylight installed in the last few years | Installation | The original installer first | Only damage to the roof around it |

The flashing is the shaped metal or flexible strip that steers water around the skylight and back onto the roof. Vivid Skylights' May 2025 guide puts it plainly: "the glass itself is rarely the problem." Our guide to [finding where a roof leak is coming from](/blog/how-to-find-a-roof-leak) covers the same detective work for leaks that aren't near a skylight.

## Is your skylight leaking, or is it condensation?

Condensation shows up as fog or droplets spread across the inside of the dome or diffuser, often on dry days, after showers or cooking, or on cool mornings. A leak shows up in rain, in one spot, and gets worse as the rain gets heavier. If water appears when it hasn't rained for days, it isn't coming through the roof.

Condensation forms when warm, moist air from inside the house meets the cooler skin of the skylight. Bathrooms, ensuites and kitchens are the usual suspects, and a single-skin dome above a hot shower can drip steadily on a humid Gold Coast morning. Vivid Skylights calls condensation "a common culprit often mistaken for a leak" and says it needs better ventilation, not roof repairs (May 2025). Solatube's March 2024 guide adds that moisture building up in a poorly ventilated roof space can condense on the underside of a skylight and seep into the home.

The fixes sit inside the house, not on the roof: run the exhaust fan longer, keep the bathroom door open after showers, and ask a skylight specialist about an insulated or double-skin unit if the problem is constant. Paying a roofer for condensation buys you nothing.

Not sure which one you have? A controlled water test settles it: someone runs a hose over one part of the roof at a time while someone else watches inside. That means being on the roof, so leave it to whoever you call.

## What makes a skylight leak?

Skylights leak because they break the roof's continuous surface. Rain has to be steered around all four sides of the opening, and any weak point in that path lets it in. The cause is either the roof and flashing around the skylight, or the skylight unit itself.

**Around the skylight (roof side):**

- **Flashings.** The head flashing on the uphill side, the side flashings and the apron at the bottom all have joints and fixings. Sealant perishes in the sun, metal corrodes, and salt air near the coast speeds both up (Vivid Skylights, May 2025).
- **A debris dam.** Leaves and grit collect on the uphill side, where water slows down to get around the opening. Once the pile is high enough, water rises over the flashing. If trees hang over your roof, this is the first thing to check. Solatube lists keeping the drainage channels around a skylight clear as one of its ways to prevent leaks (March 2024).
- **Cracked or slipped tiles beside the skylight.** Tiles around an opening often get walked on when someone works on the roof, and a cracked one next to the flashing sends water straight into the shaft.
- **Colorbond and other metal roofs.** Rusted or loose screws near the opening, or a skylight fitted so it blocks the sheet's drainage channels. BlueScope warns that blocking those channels can cause ponding and coating deterioration ([technical bulletin TB-08](https://cdn.dcs.bluescope.com.au/download/tb-08), January 2021).

**In the skylight (unit side):**

- **Perished seals and gaskets** between the dome or glass and its frame.
- **Cracked, crazed or brittle glazing,** often after hail or years of sun. Vivid Skylights gives glass skylights a typical life of 10 to 30 years and polycarbonate or acrylic ones 8 to 15 years (May 2025).
- **Poor installation,** such as a unit set at the wrong pitch so water sits on it, or a cheap kit that's hard to waterproof. Solatube says cheap DIY kits are often the main reason skylights have a bad reputation for leaking (March 2024).
- **Blocked weep holes.** Some frames have small drain holes that let water out. Once they clog, water backs up inside the frame.

Tubular skylights, also called sun tunnels, fail the same two ways: at the flashing where the tube passes through the roof, or from condensation inside the tube.

Our [roof flashing repair guide](/blog/roof-flashing-repair) explains how flashings fail and what a proper repair involves, if the torch test pointed you there.

## Should you call a roofer or a skylight company?

Call a roofer when the leak only happens in rain and nothing on the skylight itself looks damaged. That covers the flashings, tiles, sheets, screws and drainage around the opening. Call a skylight specialist when the dome, glass, frame or seals are visibly damaged, or when the problem is condensation. If the skylight went in recently, call the installer first.

When you can't tell, start with the roof. The unit is a single sealed product; the roof around it has flashings, laps, tiles or sheets, screws and a drainage path, and any of them can fail. A roofer also inspects the roof uphill of the skylight, where many "skylight leaks" really start.

Whoever comes out, ask one question before you agree to the work: **which part failed, and how do you know?** A good answer names the part. "We'll reseal it" doesn't.

At R&R Restorations, we take the roof side: the flashings, the tiles or sheets and screws around the opening, and the roof uphill of it. The dome, glass, frame, seals, blinds and opening mechanism belong with a skylight specialist, and so does fitting a new skylight.

## What should you do while the skylight is leaking?

Catch the water, protect the room, and stay off the roof. Then take photos so whoever you call can see the problem before they arrive.

1. **Catch it.** Put a bucket under the drip and towels around it. Move rugs, furniture and electronics out of the way.
2. **Kill the power if water is near a light or fan.** Turn that circuit off at the switchboard. Queensland's [Electrical Safety Office](https://www.electricalsafety.qld.gov.au/electrical-safety-home/roof-spaces) says to turn off the main power switches before anyone goes into the roof space.
3. **Stay off the roof.** A wet roof is dangerous, and a skylight is a hole in it. Don't climb up to throw a tarp over it.
4. **Take photos.** Get the stain, a close-up up the light shaft, the dome, and the roof around the skylight from the ground. Note the time, how heavy the rain was and which way the wind was blowing.
5. **Call the SES if a storm has opened the roof.** In Queensland that's 132 500 for storm and flood help; call 000 if anyone's life is at risk.
6. **Watch the ceiling.** If the plaster around the skylight sags or bulges, keep everyone out of the room. [WorkSafe Queensland](https://www.worksafe.qld.gov.au/safety-and-prevention/hazards/hazardous-exposures/biological-hazards/managing-mould) advises throwing out porous materials, such as plasterboard and insulation, that can't easily be cleaned and have been wet for more than 48 hours or show mould.

If you rent, tell your property manager straight away. Queensland's [Residential Tenancies Authority](https://www.rta.qld.gov.au/during-a-tenancy/repairs/emergency-repairs) lists a serious roof leak as an emergency repair.

## Can you fix a leaking skylight with silicone?

Sometimes, for a while. Silicone can renew a failed joint in a flashing or frame that is otherwise sound and properly shaped. It can't fix rusted flashing, cracked glazing, a debris dam or a skylight set at the wrong pitch, and smeared over the wrong joint it can trap water and make the leak worse.

That's how a skylight ends up "fixed" three times. The first tube of silicone goes on the edge you can see from the ladder. The water was coming in on the uphill side, under a cracked tile, the whole time.

Sealing a skylight from inside the house doesn't work either. The water is coming from outside, so a bead around the ceiling trim only hides it in the shaft or the ceiling.

## How much does it cost to fix a leaking skylight?

It depends on which part failed. Roof repairs around a skylight, such as flashings, tiles or screws, fall within our published focused repair range of $350 to $1,500. Repairs to the skylight unit itself typically cost $200 to $500 to reseal and $600 to $1,500 for new glazing, according to Vivid Skylights' May 2025 guide.

| Job | Typical cost | Source |
|---|---|---|
| Focused roof repair around the skylight (flashing, tiles, screws) | $350 to $1,500 | Our published roof leak repair range |
| Wider roof repairs, or difficult access | About $1,500 to $6,000 | Our published roof leak repair range |
| Resealing a skylight | $200 to $500 | Vivid Skylights, May 2025 |
| Skylight flashing replacement by a skylight company | $400 to $800 | Vivid Skylights, May 2025 |
| Skylight frame repair or replacement | $500 to $1,200 | Vivid Skylights, May 2025 |
| Skylight glass replacement | $600 to $1,500 | Vivid Skylights, May 2025 |
| Several skylight parts replaced | $1,500 to $3,000 or more | Vivid Skylights, May 2025 |
| A new skylight, supplied and installed | $550 to $5,000 or more | Western Sydney Skylights |

Our ranges are general roof repair guidance, not a skylight price list. Height, pitch, access and what we find around the opening change the figure, and we confirm it after assessing your roof. Every quote lists each repair, so you can see exactly what you're paying for.

The low quote isn't always the low bill. A $300 reseal that misses a cracked tile turns into a second callout, a wetter ceiling and a bigger repair.

## Should you repair or replace a leaking skylight?

Repair it when the unit is sound and the fault is a seal, a flashing or the roof around it. Replace it when the dome is cracked, crazed or yellowed, the frame has rotted or rusted, or the skylight is near the end of its life: about 10 to 30 years for glass and 8 to 15 years for polycarbonate or acrylic (Vivid Skylights, May 2025).

If you replace it, choose quality. Solatube says to expect to pay more than $600 for a quality skylight installation, and to look for a product warranty of 7 years or more (March 2024).

Planning a roof restoration as well? Sort out a tired skylight first. Replacing an old unit after the roof is recoated can mean disturbing the flashings and roofing around it again.

One leaking skylight is not a reason to restore the whole roof. But if the skylight leak comes with stains in other rooms, crumbling ridge pointing or rust across the sheets, patching one spot only moves the leak. That's when a roof restoration is the better value. Our published guide puts a tiled roof restoration at about $6,500 to $9,500 for a medium home and $9,000 to $13,000 for a larger roof, and metal or Colorbond roofs at about $5,000 to $12,000.

## Is R&R Restorations right for you?

We're the right call if your skylight leaks in rain, the dome looks intact, and your home is on the Gold Coast, in Brisbane and Logan, or in the Tweed and Northern Rivers. We fix the roof side of the problem on concrete tile, terracotta and Colorbond roofs: flashings, cracked or slipped tiles, rusted screws, lifted sheets and the ridge caps and valleys higher up. You deal with the owner, Alex Rowe, from the first call, and you get an itemised quote. We're licensed and insured: QBCC Licence No. 15404087.

"...the whole roof is completely watertight. Alex was fantastic to deal with, turned up on time, and offered a great price."
Julie, after we cleaned her roof and repointed the ridge caps (Google review, 20 October 2026)

"We couldn't have asked for better service, Alex was extremely helpful sorting out the issues"
sue porter (Google review, 28 November 2025)

We're not the right first call if:

- **The dome is cracked or the seals have perished.** That's the skylight unit, and a skylight specialist can repair or replace it.
- **It's condensation.** Ventilation fixes it, not roof work.
- **The skylight is new.** Call the installer first; their workmanship may be at fault.
- **You want a new skylight fitted.** We don't supply or install skylights.
- **Your roof is asbestos cement.** We don't work on asbestos roofs.
- **You're outside our service area.**

## Skylight leak FAQs

### Why does my skylight only leak in heavy rain?

Heavy or wind-driven rain finds weak spots that light rain doesn't reach: an open flashing joint, a side flashing on the windward side, or a debris dam on the uphill side that lets water rise over the flashing. A roofer should check the roof around and above the skylight first.

### Can a skylight leak when it isn't raining?

Not from rain. Water around a skylight on a dry day is usually condensation, especially over a bathroom or kitchen. If it's coming from the ceiling rather than the dome, check for a plumbing pipe or an air-conditioner drain in the roof space.

### Do roofers fix skylight leaks?

Roofers fix the roof side of a skylight leak: the flashings, tiles, sheets and screws around the opening, and the roof uphill of it. A skylight specialist fixes the unit itself: the dome, glass, frame and seals. We do the roof side.

### Is a leaking skylight covered by insurance?

It depends on the cause and your policy. Sudden storm damage, such as a hail-cracked dome, is treated differently from seals that wore out over years. Photograph everything before any repair, and read our guide to [roof leak insurance claims](/blog/roof-leak-insurance) before you lodge one.

### Should I put a tarp over a leaking skylight?

Not yourself. Climbing a wet roof to tie down a tarp is how people get hurt. Catch the water inside, take photos, and call a roofer, or the SES on 132 500 if a storm has opened up the roof.

### Will a roof restoration stop my skylight leaking?

Only if the leak comes from the roof around the skylight. A roof restoration replaces broken tiles, rebeds and repoints the ridge caps, deals with rust and failed screws, and recoats the roof. It doesn't fix a cracked dome or a failed seal inside the skylight unit.

### Did hail cause my skylight to leak?

It can. Hail can crack a polycarbonate or acrylic dome and break roof tiles, and after a storm you may have both. Check from the ground, photograph what you see, and read [what to check after a hailstorm](/blog/hail-damage-roof) before you book repairs.

## Get the leak fixed once

Send us your suburb, your roof type and what you've noticed. Two photos help: one looking up the light shaft and one of the roof around the skylight, taken from the ground. They're optional, and nobody needs to climb a ladder to take them. Call us on 0422 630 075, or [book a roof leak repair](/services/roof-leak-repairs-gold-coast) and get a dry ceiling after the next storm.


## Related

- [Roof restoration advice](https://rnrroofrestorations.com.au/blog)
- [Get a roof restoration quote](https://rnrroofrestorations.com.au/contact)