By Skylight Experts
Why regular maintenance matters
Skylights sit in exposed roof locations, collecting dirt, pollen and moisture. Without regular care, seals degrade, condensation forms and energy efficiency suffers. Routine cleaning and inspections keep your skylight bright, prevent leaks and extend its life.
Prevent moisture and debris build‑up
Leaves, pollen and organic material around skylight seals trap moisture and break down flashing. Clearing debris and washing the skylight reduces the risk of leaks and interior water damage. Condensation control is equally important: unchecked condensation can weaken framing and encourage mould and mildew. Maintain good ventilation and consider installing vented skylights in high‑humidity rooms.
Match your cleaning method to the material
Different materials require different care. Glass skylights are durable and can be cleaned with a mild soap and water solution applied with a microfiber cloth. Acrylic skylights scratch easily; use a soft cloth with a gentle, ammonia‑free cleaner. Polycarbonate skylights also need gentle cleaning. Multi‑pane skylights should be cleaned carefully to avoid stressing the seals.
Step‑by‑step cleaning
1. Dust the interior first: wipe the inside with a damp, lint‑free cloth to remove dust.
2. Rinse and dry: rinse the exterior lightly with clean water and dry it immediately to prevent streaks.
3. Apply cleaning solution to the cloth: never spray cleaner directly onto the skylight; apply it to your cloth to avoid moisture seeping into seals.
4. Use stable access: use extension poles with soft brushes from ground level when possible, and only climb ladders when conditions are dry and stable.
5. Choose the right weather: clean on an overcast day to prevent rapid drying and streaks.
Professional inspections and seasonal care
Professionals bring specialised tools and inspect for microcracks, worn seals and early flashing failure. They also assess surrounding roofing materials and drainage paths. Early warning signs like fogging between panes or discolouration on drywall suggest seal failure and warrant professional attention.Schedule maintenance seasonally: clear pollen and debris in spring, inspect UV degradation in summer, clear drainage in autumn and monitor condensation in winter. Automated skylights need additional care — clean moisture sensors, lubricate motorised components and check seals around moving parts regularly.
If you have older acrylic domes, be aware that sunlight causes the plastic to become brittle over time. Professionals recommend replacing these units with modern skylights for safety and improved insulation.
FAQs
Q: How often should skylights be cleaned?
A: Clean the glass and clear debris at least twice a year. Homes surrounded by trees may require more frequent maintenance.
Q: What cleaning products should I avoid?
A: Avoid ammonia, alcohol or abrasive cleaners, metal scrapers and rough brushes — they can damage coatings and scratch acrylic or polycarbonate surfaces.
Q: When should I call a professional?
A: Contact a specialist if you notice persistent condensation, fogging between panes, cracked glazing or stains on the surrounding drywall.
