About Ceiling Waterproofing in Singapore by Atlas Works Waterproofing Specialist
Singapore’s tropical climate, characterised by high humidity and frequent heavy downpours, creates unique challenges for property owners. One of the most common issues faced is ceiling leakage, which can cause significant damage if left unaddressed. This comprehensive guide explores ceiling waterproofing in Singapore, offering insights into why it’s essential, how to identify problems, and the best approaches to resolving them.
Understanding Ceiling Leakage in Singapore
Living in Singapore means dealing with abundant rainfall throughout the year. This constant exposure to moisture makes buildings particularly vulnerable to water infiltration issues. Ceiling leaks are among the most distressing problems homeowners and building managers face, often manifesting as water stains, mould growth, or even actively dripping water during heavy rain.
For many Singaporeans, the experience of placing buckets under leaking ceilings during monsoon season is all too familiar. Take the case of Eden Tan, a Serangoon HDB resident who has been forced to “get a pail each time it rains” for over a year and a half due to persistent ceiling leaks. Her situation highlights a common problem that affects both public housing and private properties across the island.

Common Causes of Ceiling Leaks
Understanding the root causes of ceiling leakage is crucial for effective waterproofing. In Singapore, several factors typically contribute to this issue:
Deteriorated Waterproofing Membranes
Over time, the waterproofing membranes in bathrooms, rooftops, and other water-prone areas can deteriorate. This is especially common in older buildings where the original waterproofing materials have exceeded their effective lifespan.
Inter-floor Leakage
In multi-storey buildings like condominiums, water often seeps through from upper floors. This typically happens when the waterproofing in an upstairs neighbour’s bathroom fails, allowing water to penetrate the concrete slab and affect the ceiling below.
Roof Leaks
For top-floor units, roof leakage is a significant concern. As seen in the Serangoon HDB case, residents on the highest floors are particularly vulnerable to ceiling leaks during heavy rainfall.
Plumbing Issues
Leaking pipes within ceiling voids can cause water to accumulate and eventually seep through the ceiling material.
Concrete Cracks and Structural Issues
Over time, buildings may develop hairline cracks in concrete slabs that allow water to penetrate.
Signs You Need Ceiling Waterproofing
Identifying ceiling leakage problems early can save you from costly repairs down the line. Here are key indicators that your ceiling may require waterproofing attention:
- Visible water stains or discolouration on ceilings
- Mould or mildew growth on ceiling surfaces
- Peeling paint or bubbling plaster
- Dripping water during or after rainfall
- Damp spots that appear and disappear
- Musty odours in rooms with no obvious source
- Deteriorating ceiling plaster that crumbles or falls away
Early detection of these signs is crucial. As one Serangoon resident discovered, prolonged exposure to ceiling leaks not only damaged her home but also affected her family’s health, with her husband’s eczema worsening due to the mould and deteriorating plaster.

The Impact of Ceiling Leaks on Your Property and Health
Ceiling leakage problems extend far beyond mere inconvenience. If left unaddressed, they can lead to:
Property Damage
Water infiltration can damage electrical systems, furniture, flooring, and valuable possessions. As Ms. Tan from Serangoon noted, she worries about the risk to electronics in her home due to the persistent leaks.
Structural Concerns
Prolonged exposure to moisture can compromise the structural integrity of your building, potentially leading to concrete spalling (where concrete breaks off from the surface) and corroded reinforcement bars.
Health Risks
Damp environments promote mould growth, which can trigger respiratory issues, allergies, and skin conditions. The Serangoon case demonstrates this clearly, with one resident’s eczema worsening due to the mouldy conditions.
Decreased Property Value
Visible water damage and a history of leakage problems can significantly reduce your property’s market value.
Ceiling Waterproofing Solutions in Singapore
Addressing ceiling waterproofing in Singapore requires a systematic approach. Here are the primary methods used by professionals:
Membrane Waterproofing
This involves applying liquid waterproofing membranes that cure to form a seamless, water-resistant barrier. Modern membranes are flexible and can bridge small cracks in the substrate.

Cementitious Waterproofing
These systems use specialised cement-based materials that penetrate the concrete to create a water-resistant barrier. They’re particularly effective for concrete structures.

Polyurethane Injection
For existing leaks, polyurethane (PU) injection can be an effective solution. This method involves injecting expandable polyurethane into cracks or joints to seal them against water penetration. However, as noted in one discussion about inter-floor leakage, PU injection may simply “push the water elsewhere” if the source of the leak isn’t properly identified first.
Roof Waterproofing
For top-floor units, comprehensive roof waterproofing may be necessary to prevent ceiling leaks during heavy rainfall.

Legal and Responsibility Aspects in Singapore
Understanding who bears responsibility for ceiling waterproofing is crucial, especially in multi-unit buildings:
HDB Flats
For public housing, the Town Council typically handles roof leakage issues as they’re considered common property. However, as seen in the Serangoon case, repairs aren’t always effective, and residents may face prolonged problems despite multiple repair attempts.
Condominiums
In private condominiums, the situation can be more complex:
- For inter-floor leakage, the upstairs neighbour is generally responsible for fixing leaks originating from their unit.
- The Management Corporation Strata Title (MCST) is responsible for common property, which may include main stacks and certain plumbing systems.
- Some condominiums have waterproofing warranties that last around ten years, which can be claimed for certain types of leaks.
Legal Recourse
When neighbours or management corporations are uncooperative, property owners may need to seek mediation or legal advice. In one case, a condo owner faced difficulties when their upstairs neighbour claimed they couldn’t afford to fix a bathroom leak that was affecting the unit below.
Choosing a Waterproofing Contractor
Selecting the right waterproofing specialist is perhaps the most crucial decision in resolving ceiling leakage issues. Here’s what to consider:
Experience and Expertise
Look for contractors with specific experience in ceiling waterproofing in Singapore. Atlas Works Waterproofing stands out in this regard, with extensive experience handling various waterproofing challenges unique to Singapore’s climate and building types.
Comprehensive Assessment
A reputable contractor like Atlas Works Waterproofing will conduct a thorough assessment to identify the root cause of the leak before proposing solutions. This is essential, as treating symptoms without addressing the source will lead to recurring problems.
Warranty and Guarantees
Ensure your contractor offers a substantial warranty period for their work. Atlas Works Waterproofing provides comprehensive warranties that give property owners peace of mind.
Proper Licensing and Insurance
Verify that your chosen contractor is properly licensed and insured to perform waterproofing work in Singapore.
Transparent Quotations
The cost of ceiling waterproofing depends on various factors including the extent of the damage, the size of the affected area, and the complexity of the required solution. Each project is unique, and a professional assessment is necessary to determine the appropriate approach and associated costs. Atlas Works Waterproofing provides clear, detailed quotations without hidden charges.
Atlas Works Pte Ltd | Waterproofing & Painting Services Singapore | Residential & Commercial 122 Google reviews Yuqian Gao2025-04-26Trustindex verifies that the original source of the review is Google. Very professional very good job, the service is amazing, Bernard is very patient and tried his best to explain to me everything. Recommended -Jumkaana -2025-04-24Trustindex verifies that the original source of the review is Google. There’s been a water leak affecting a lower-level unit, and I contacted several companies for assistance. Most just quoted a price and mentioned a 1-year warranty without properly investigating the issue. One even said that if it leaked again within two weeks, they’d remove the toilet bowl to inspect it—but only for an additional charge. What set Eric apart was his thorough approach. He took the time to carefully investigate the possible sources of the leak and answered all my questions in detail. That level of service is truly exceptional. Thank you, Eric! khaled mokri2025-04-23Trustindex verifies that the original source of the review is Google. Neighbour downstairs complained of leaking from pipes above. Hdb came and we failed the water test. Called Atlas and queries were answered promptly and honestly. Price was also agreed upfront. Worker came the next available day and completed the work efficiently. Quick and with no fuss at all. We then passed the water test!!! Highly recommend Atlas, quality workmanship at a good price. There’s also a warranty for a peace of mind. Gu Bo2025-04-21Trustindex verifies that the original source of the review is Google. Bernard was very thorough and helped us understand clearly the condition of the apartment using his moisture meter and expertise Andy Quek2025-04-21Trustindex verifies that the original source of the review is Google. After comparing few quotes, I finally engage on Atlas work for my whole house painting. Bernard is very professional and quick in replying. We chat like we know each other for long time. This is most impt in choosing contractor as the communication is impt. Before actual work, there was a Alot of changes here and there but he is patient and make sure he replies to all queries. As nothing is perfect in all company, same goes for Atlas. after painting there are parts not painted properly. Feedback to Bernard and he make sure all remedy work are done to perfection! End day, I am a happy customer. Look for Bernard, make sure he is busy and don't let him rest! 🤣 Peter Morrison2025-04-13Trustindex verifies that the original source of the review is Google. I engaged Atlas to quote for fixing some water leakage issues and was immediately impressed with their thoroughness and professionalism. The crew that attended worked hard on a variety of jobs for two long days and were quiet, respectful, and thoroughly competent on every job. I'd definitely recommend them. Hwee Koon Goh2025-04-10Trustindex verifies that the original source of the review is Google. Prompt responses, helpful recommendations and clear explanations right from the start upon enquiry about painting my home. The painters did a good job, making sure to fix cracks before painting, pointing out areas of concern and explaining the work process so I know what to expect. They are also pleasant, approachable and reassuring. 👍🏻 Angeline Chua2025-04-09Trustindex verifies that the original source of the review is Google. I engaged Atlasworks for waterproofing for my toilets and planter boxes as well as a pipe bypass back in January, and their team proved to be efficient, responsive, and meticulous. Three months later, my neighbor below experienced a ceiling leak and suspected my planter box to be the cause. The team went the extra mile to help perform water ponding test, which confirmed that the waterproofing was effective and my planter box was not responsible for the leak. Throughout the entire process, their team has been exceptionally supportive and proactive in assisting to resolve the dispute with my neighbor. Their dedication to quality workmanship and customer satisfaction is evident, and I would highly recommend their services. ST Lee2025-03-25Trustindex verifies that the original source of the review is Google. I would like to express my appreciation for the excellent water seepage repair work carried out today. Your team demonstrated professionalism, efficiency, and attention to detail. From the initial assessment to the completion of the repair, the team was thorough in identifying the root cause and ensuring a proper solution. The workmanship was meticulous, and the area was left clean and tidy after the job. It made the entire process smooth and hassle-free. Thank you once again for your outstanding service. I would not hesitate to recommend your company to others in need of similar work.
Preventive Measures and Maintenance
Preventing ceiling leaks is always preferable to dealing with them after they occur. Here are some preventive strategies:
Regular Inspections
Schedule periodic inspections of your ceilings, especially during and after heavy rainfall. Early detection of minor issues can prevent major problems.
Bathroom Waterproofing Maintenance
For upper-floor units, ensure your bathroom waterproofing is maintained properly to prevent affecting neighbours below.
Prompt Repairs
Address any signs of leakage immediately rather than waiting for the problem to worsen.
Professional Waterproofing Checks
Consider having Atlas Works Waterproofing conduct periodic assessments of your property’s waterproofing integrity, particularly for older buildings.
Case Studies: Ceiling Waterproofing in Singapore
Condominium Inter-floor Leakage
A homeowner in Singapore purchased a condominium unit and discovered significant water droplets on the concrete slabs above the bathroom during renovations. A waterproofing expert confirmed that the source was the upstairs neighbour’s bathroom, which required renovation to fix the leak. This case highlights the complexity of resolving inter-floor leakage issues when multiple parties are involved.
Condo inter-floor leak, upstairs neighbour claims they don’t have funds to fix. Now what?
byu/rambroham inaskSingapore
HDB Roof Leakage
Several residents in a Serangoon HDB block built in 1985 have faced persistent ceiling leaks for years, despite multiple repair attempts by the town council. One resident has been dealing with leaks for most of the two decades she has lived in the block, demonstrating how challenging some waterproofing issues can be to resolve permanently.
When to Call in the Professionals
While minor ceiling stains might tempt you to try DIY solutions, most ceiling waterproofing issues require professional intervention. You should contact a specialist like Atlas Works Waterproofing when:
- You notice active water dripping from your ceiling
- Water stains continue to expand despite simple remedies
- Mould keeps returning after cleaning
- You’re experiencing recurring leaks in the same area
- There’s visible damage to your ceiling structure
Professional waterproofing contractors have the expertise, equipment, and materials to properly diagnose and address ceiling leakage issues that would be beyond the capabilities of most homeowners.

Conclusion
Ceiling waterproofing in Singapore is not just about fixing leaks—it’s about protecting your property investment and ensuring a healthy living environment. The tropical climate makes waterproofing particularly crucial, and addressing issues promptly can save you from costly repairs and health concerns down the line.
Whether you’re dealing with inter-floor leakage in a condominium, roof leaks in an HDB flat, or general ceiling moisture problems, understanding the causes, responsibilities, and solutions is essential. By working with experienced professionals like Atlas Works Waterproofing, you can ensure that your ceiling waterproofing needs are addressed effectively and durably.
Remember that prevention is always better than cure. Regular inspections and maintenance can help you avoid the distress of having to “get a pail each time it rains” and ensure your home remains dry and comfortable throughout Singapore’s rainy seasons.

