Leaky skylights or windows can be sneaky. What starts as a small drip can quickly lead to water damage, mould, and even structural issues. Knowing the signs early can help you avoid expensive repairs and maintain a dry, healthy home or building.

At QPC, we’ve helped countless Auckland homeowners and Body Corporates resolve leaking skylight and window issues for good. Here’s what to look out for, what causes it, and what to do if you suspect you’ve got a leak.

🛑 Signs Your Skylight or Window Is Leaking

1. Water Stains or Discolouration

Brown stains or dark patches around the interior frame or ceiling are strong indicators that water is getting in. These are often the first visible signs and should never be ignored.

2. Peeling Paint or Bubbling Plaster

Moisture behind your walls can cause paint to peel or bubble. This usually means water is travelling along the wall cavity before showing up inside.

3. Mould or Mildew Smell

Damp smells near your skylight or window could be a sign of hidden leaks. If you spot mould or mildew forming on your ceilings or walls, act fast.

4. Drips or Puddles After Rain

If you notice dripping or small pools of water during or after heavy rain, the source is likely an unsealed window frame or a failed skylight seal.

5. Condensation Between Glass Layers

Double-glazed units that appear foggy or misty may have broken seals. While this isn’t always a water leak, it does indicate failure of your insulation barrier.

🔍 Common Causes of Skylight and Window Leaks

• Failed Flashings or Sealants
  Over time, flashing around skylights or caulking around windows can crack or lift, letting water in.

• Poor Installation
  Incorrect placement or inadequate waterproofing details can cause problems from day one.

• Blocked Gutters or Roof Valleys
  Water overflowing can find its way into vulnerable areas around roof penetrations like skylights.

• Aging Frames or Glass
  Older timber joinery or poor-quality frames can rot or separate, creating gaps.

🛠️ How QPC Fixes Skylight & Window Leaks

We don't just patch things up — we fix the problem at the source. Here's how:

• Thorough inspection using moisture meters and visual checks

• Resealing or replacing faulty joinery and flashings

• Roof and cladding repairs if the leak comes from above

• Installation of new skylight systems or double-glazed units if needed

• Reporting for insurance claims or Body Corporate records

📍 Where These Leaks Typically Occur

• Skylights on low-pitched roofs

• Timber-framed windows in older homes

• Joinery facing the prevailing wind and rain

• Second-storey windows near eaves or parapets

If your building fits any of these criteria, regular checks can help you avoid disaster.

👷 Why Choose QPC?

✔ Over 50 years of combined experience
✔ Trusted by Body Corporates and property owners across Auckland
✔ Fast inspections with honest advice
✔ Clear reporting and targeted repair solutions
✔ We handle everything — leak detection to full repair