A properly maintained skylight dome can offer decades of bright, natural light while protecting your home from the elements. This guide outlines everything you need to know to keep your acrylic or polycarbonate skylight dome performing at its best.
Why Maintenance Matters
Even the highest-quality skylight domes are exposed to New Zealand’s changing climate—UV rays, rain, wind, salt air, and thermal stress. Over time, these can degrade surface coatings, weaken seals, and reduce light clarity. A little proactive care goes a long way toward extending the life of your dome and avoiding premature replacements.
How Often Should You Maintain Your Dome?
General inspection
Every 6–12 months
Cleaning
Twice a year or as needed
Sealant checks
Annually
After major storms
Inspect for cracks, leaks, or damage
Cleaning Your Skylight Dome
What You’ll Need:
- Soft sponge or microfibre cloth
- Mild, non-abrasive soap (e.g. dishwashing liquid)
- Bucket of warm water
- Garden hose (optional)
Steps
- Rinse off loose dirt using a hose or a bucket of water.
- Use a soft sponge with mild soap to gently wipe the surface.
- Avoid scrubbing or using abrasive pads that may scratch the dome.
- Rinse thoroughly and allow to air dry.
Important
- Never use window cleaner, ammonia, turpentine, or alcohol-based products.
- Do not use high-pressure hoses.
- Avoid walking on or putting weight on the dome.
Inspecting for Damage
Key areas to check:
- Cracks or hairline fractures around fasteners or edges
- Yellowing or cloudiness that doesn’t wash off
- Sealant deterioration or gaps around the frame
- Water stains or signs of condensation buildup underneath
If you notice any of the above, it may be time to replace your dome. See our Troubleshooting Guide for next steps.
Seasonal Considerations
Winter:
- Check for drafts or cold air around the skylight frame.
- Clear debris such as leaves or ice dams that may obstruct water drainage.
Summer:
- Inspect for signs of UV-related discolouration or brittleness.
Preventative Tips
- Trim nearby trees to avoid falling branches or accumulated debris.
- Reapply UV-protective coatings if your dome manufacturer recommends it.
- Secure roofing fasteners and flashing during roof inspections.
When to Contact a Professional
If you observe serious cracks, interior water damage, or suspected structural issues, contact a professional installer. They can help assess whether repair or replacement is needed.
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Final Thoughts
With a simple maintenance routine and regular inspections, your acrylic or polycarbonate skylight dome can provide beautiful natural light for many years. Stay proactive to protect your investment.