Last updated: 11 April 2026
Skylights are among the most neglected glass surfaces in Singapore buildings — yet they face the most intense exposure to tropical rain, UV radiation, mineral deposits, and biological growth due to their horizontal or angled position. At Lion City Glass, we provide specialist skylight glass cleaning and restoration services that restore clarity, transparency, and performance to all types of skylight installations across HDB common areas, condominiums, landed homes, commercial buildings, and industrial facilities island-wide.
Whether your skylight has turned cloudy from years of mineral buildup, developed unsightly green algae patches, or simply lost its sparkle due to Singapore’s relentless humidity and rainfall — our trained technicians have the tools, chemicals, and access equipment to bring it back to near-original condition.
What Is Professional Skylight Glass Cleaning?
Professional skylight glass cleaning goes far beyond what a regular window cleaner or building maintenance team can achieve. It combines specialist access equipment, industrial-grade chemical treatments, and mechanical polishing techniques to remove stubborn deposits that ordinary cleaning cannot touch.
Skylights in Singapore face a unique combination of challenges: equatorial UV intensity, frequent heavy rainfall that pools on horizontal surfaces, high humidity that promotes biological growth, and airborne pollutants from urban and industrial activity. Standard cleaning methods — a squeegee and soapy water — simply cannot address the layered contamination that builds up over months and years.
Our skylight glass cleaning service is a comprehensive restoration process that addresses every type of contamination simultaneously, restoring optimal light transmission and visual clarity. For skylights with deep surface damage, we combine chemical treatment with professional glass polishing and scratch removal to achieve the best possible result.
Why Skylights Need Specialist Restoration in Singapore
Unlike vertical glass surfaces such as windows and facade panels, skylights accumulate damage at an accelerated rate because of their orientation. Here is why Singapore skylights deteriorate faster than almost any other glass surface in a building:
- Rainwater pooling — Water sits on horizontal or low-angle glass for extended periods, and when it evaporates in Singapore’s heat, it leaves concentrated calcium and magnesium mineral deposits behind. This is the same mechanism that causes hardwater mineral stains on shower screens and windows, but far more severe on skylights.
- Intense UV exposure — Singapore receives some of the highest UV radiation levels in the world. Skylights absorb direct overhead UV year-round, accelerating surface degradation, yellowing in polycarbonate panels, and breakdown of protective coatings.
- Biological colonisation — Algae, moss, lichen, and mould thrive in Singapore’s warm, humid conditions. Flat or low-angle glass with standing water provides an ideal growth surface, and once biological matter takes hold, it bonds to the glass and cannot be removed with standard cleaning.
- Inaccessibility — Most skylights are installed at height or in positions that are difficult to access safely. This means they are cleaned infrequently — or not at all — allowing contamination to compound year after year.
- Chemical staining from cleaning agents — When well-meaning maintenance teams attempt to clean skylights with inappropriate products, the chemicals can dry on the glass in Singapore’s heat and cause acid etching and chemical staining that is worse than the original problem.
- Construction and renovation debris — Skylights in buildings that have undergone renovation often collect cement dust, paint splatter, and silicone residue. Our post-renovation glass cleaning service addresses these specific contaminants.
Types of Skylight Damage We Restore
Our technicians encounter a wide range of skylight damage across Singapore properties. Here are the most common types we treat:
- Hardwater mineral scaling — Thick, white calcium and magnesium deposits from rainwater pooling and evaporation. This is the number one skylight problem in Singapore.
- Algae and biological growth — Green, black, or brown biological matter that bonds to the glass surface and frames. Common on skylights surrounded by trees or in humid, shaded locations.
- UV yellowing and hazing — Discolouration and loss of clarity in older acrylic or polycarbonate skylight panels exposed to years of direct tropical sunlight.
- Acid rain etching — Microscopic surface damage from atmospheric acid exposure, leaving a permanent haze that cannot be wiped away.
- Silicone and sealant residue — Staining and smearing around skylight frames, joints, and gaskets from installation or maintenance work.
- Construction contamination — Cement, plaster, paint, and adhesive residue from building renovation or nearby construction activity.
- Oxidation and corrosion staining — Metal oxide run-off from aluminium or steel frames that stains the glass surface brown or grey.
How Our Skylight Restoration Process Works
Skylight restoration requires specialised access equipment and techniques suited to each installation type, height, and surrounding environment. Our process is designed to restore skylight clarity safely and effectively, without compromising the waterproofing or structural integrity of the installation.
- Site survey and access assessment — We visit the property to assess the skylight installation, plan safe access (scaffolding, rope access, cherry picker, or internal platform), and identify any safety considerations.
- Contamination analysis — We examine the glass to identify all stain types, surface damage, and material composition (glass, tempered glass, laminated glass, polycarbonate, or acrylic).
- Pre-treatment — Biological matter and loose mineral deposits are pre-treated with specialist solutions to soften and loosen them before the main cleaning phase.
- Chemical treatment — Targeted chemical applications based on the specific stain types identified. Different chemicals are used for mineral deposits, biological growth, and chemical staining.
- Mechanical polishing — For skylights with surface-level damage, etching, or deep staining, we use professional glass polishing equipment to restore optical clarity. Learn more about our glass polishing and scratch removal process.
- Final cleaning and inspection — Thorough rinse and inspection to ensure all contamination has been removed and the glass is restored to optimal clarity.
- Protective nano coating (optional) — We can apply a hydrophobic nano coating to the restored skylight surface to slow down future contamination buildup and make maintenance easier. See our nano hydrophobic glass coating service for details.
Residential Skylight Cleaning and Restoration
Landed properties, condominium penthouses, and maisonettes with skylight installations benefit enormously from professional skylight restoration. After years of neglect, many residential skylights appear permanently clouded or stained — but in the vast majority of cases, professional restoration returns them to near-new clarity.
Common residential skylight locations we service include:
- Stairwell skylights in landed homes (terraces, semi-detached, bungalows)
- Atrium skylights in double-volume living spaces
- Bathroom and kitchen skylights
- Roof terrace glass canopies and pergola roofing
- Condominium common area skylights (lobby, pool deck, function rooms)
- Penthouse and rooftop skylights
Homeowners are often amazed at how much brighter their interior spaces become after skylight restoration — many do not realise how much light transmission has been lost gradually over the years. A restored skylight can reduce the need for artificial lighting during daytime hours, saving energy costs and improving the living environment.
Commercial Skylight Cleaning and Restoration
Shopping malls, hotel atriums, office buildings, conservatories, and industrial facilities with skylight installations rely on natural light transmission for ambiance, energy efficiency, and occupant wellbeing. Stained or clouded skylights reduce natural light penetration, increase artificial lighting costs, and create a poor visual impression for tenants, guests, and customers.
Our commercial skylight restoration service restores optimal light transmission with minimal disruption to building operations. We work with building management teams to schedule access during off-peak hours and coordinate with other trades as needed. For large commercial facades and glass surfaces, our facade glass cleaning and restoration service provides comprehensive coverage for the entire building envelope.
Skylight Glass Cleaning Pricing in Singapore
Skylight cleaning and restoration pricing depends on several factors including the size of the skylight installation, the type and severity of contamination, the access method required, and the glass material. Here are indicative starting prices:
- Small residential skylight (single panel) — from SGD 250
- Multi-panel residential skylight — from SGD 450
- Landed property full skylight restoration — from SGD 600
- Condominium common area skylights — from SGD 800 (depending on access requirements)
- Commercial skylight installations — from SGD 1,500 (quoted per project)
- Optional nano hydrophobic coating add-on — from SGD 15 per square foot
For a detailed breakdown of our pricing structure across all glass restoration services, visit our glass restoration pricing page.
Every project begins with a free on-site assessment. We provide a detailed quotation based on the actual condition of your skylights — no guesswork, no hidden charges.
Frequently Asked Questions About Skylight Glass Cleaning
Can all types of skylights be professionally restored?
We work with glass, tempered glass, laminated glass, polycarbonate, and acrylic skylight panels. Restoration methods vary depending on the material — for example, polycarbonate requires different chemical treatments than standard float glass. We assess each installation before recommending a treatment plan and will always advise honestly if a panel is beyond restoration and needs replacement.
How often should skylights be professionally cleaned in Singapore?
In Singapore’s tropical climate, we recommend professional skylight cleaning every 6 to 12 months. Properties surrounded by trees or located near construction sites may need more frequent treatment. Skylights with a nano hydrophobic coating applied can often extend the interval to 12 to 18 months, as the coating slows mineral and biological buildup significantly.
Is skylight restoration safe for the building structure?
Absolutely. All our skylight restoration work is conducted by trained technicians using proper safety equipment and non-damaging techniques. We do not compromise the skylight’s structural integrity, waterproofing seals, or surrounding roofing materials. Our chemicals are glass-safe and will not damage frames, gaskets, or sealants when applied correctly.
Can you remove green algae and moss from skylight glass?
Yes — biological growth removal is one of the most common skylight restoration requests we receive. Our specialist biocide treatments kill algae, moss, and lichen at the root level, and our mechanical cleaning removes all residue from the glass surface. We can also apply a protective coating afterwards to inhibit regrowth.
Will skylight cleaning make my rooms brighter?
In most cases, dramatically so. Skylights that have accumulated years of mineral deposits, biological growth, and surface haze can lose 30 to 50 percent of their light transmission. Professional restoration removes these obstructions and returns the glass to near-original transparency, flooding your interior with natural light again.
Do you offer ongoing skylight maintenance contracts?
Yes. For commercial properties and residential developments with large skylight installations, we offer scheduled maintenance contracts that include regular cleaning visits at agreed intervals. This proactive approach prevents heavy buildup, maintains light transmission, and reduces long-term restoration costs. Contact us for a maintenance proposal tailored to your property.
What is the difference between skylight cleaning and skylight restoration?
Skylight cleaning removes surface-level dirt, dust, and light biological growth. Skylight restoration goes further — it addresses deep mineral staining, chemical etching, surface scratches, and bonded contamination that cannot be removed by cleaning alone. Most neglected skylights in Singapore require restoration rather than just cleaning. For a full overview of glass restoration methods and when they apply, read our complete glass restoration guide.
Get a Free Skylight Assessment Today
Stop living under cloudy, stained skylights. Let Lion City Glass restore the natural light your property was designed to enjoy. Our skylight glass cleaning and restoration service covers all property types across Singapore — residential, commercial, and industrial.
Call or WhatsApp us today for a free on-site assessment and quotation:
📞 +65 9669 3006 | 💬 WhatsApp Us | ✉️ enquiry@lioncityglass.com.sg
Lion City Glass — Singapore’s specialist glass restoration company. We restore what others replace.