Do Tubular Skylights Leak? What You Need to Know About Waterproofing
One of the most common concerns homeowners have is whether tubular skylights are prone to leaking.
The short answer: when installed correctly, modern tubular skylights are exceptionally reliable and watertight.
Here’s what you need to know.
Why Do Some Skylights Leak?
Leaks almost always result from:
- Poor installation practices
- Incompatible flashing kits
- Damaged or aged roofing materials
When the right products are installed by a qualified professional, leaks are extremely rare.
How Tubular Skylights Stay Watertight
Modern systems use several layers of protection:
- Custom flashing kits designed for your specific roof type (corrugated, tiled, membrane)
- Weather-sealed domes to prevent water ingress
- Integrated drainage channels that direct rain away
These features work together to ensure long-term performance.
Illustrative Example Only: A Christchurch homeowner installed a tubular skylight over 10 years ago. With regular roof inspections, no leaks have ever occurred.
Installation Matters Most
Even the best skylight can fail if not fitted properly.
Always:
- Choose an installer experienced in tubular systems
- Confirm flashing compatibility
- Ensure work meets NZ Building Code Clause E2 (External Moisture)
For more detail, see our guide on Corrugated Iron vs Tiled Roof Flashing.
How to Prevent Leaks Long Term
- Inspect the roof regularly: Check for damage or debris buildup
- Clear gutters and downpipes: Proper drainage protects all roof penetrations
- Maintain seals and domes: Occasionally clean and inspect
Common Questions
Q: What happens if a leak does occur?
A: Professional installers often provide warranties covering materials and workmanship. Early intervention usually prevents major issues.
Q: Can I install a tubular skylight myself?
A: DIY installation isn’t recommended. Professional fitting ensures compliance and peace of mind.
Final Thoughts: Confidence in Your Investment
Leaks are often the result of shortcuts — not the product itself.
When you invest in quality materials and trusted installers, you can enjoy natural light without worry.
Need help planning your project? Send us your details and we’ll connect you with a qualified local expert.
