Category: Waterproofing

Early attention allows repairs to be carried out smoothly, before the damage spreads further.

Key Takeaways

• Roof water leakage is one of the most common and costly building issues in Malaysia, affecting homes and commercial properties. 
• Poor waterproofing, aging materials, blocked gutters, and humid, rainy climate are the main contributors to roof leaks.
• Untreated leaks can cause structural damage, mould growth, corrosion, and electrical hazards, making early detection critical.
• Professional waterproofing not only stops leaks but also protects structural integrity, preserves property value, and reduces long-term repair costs. 

Table of Contents

1. Common Causes of Roof Water Leakage in Malaysia
2. How Waterproofing Repairs Roof Water Leakage
3. Remove Failed Waterproofing Systems
4. Locate the Leak, Repair and Seal Cracks
5. Clean and Prepare the Roof Surface
6. Apply Nano-G Waterproofing Solutions

Water leakage in roofs remains one of the most persistent and costly building issues in Malaysia. For year s, roof leaks are not isolated incidents, they are a widespread industry problem affecting residential, commercial, and strata-managed properties nationwide.

A recent industry survey involving Malaysian property and facility management professionals revealed that waterproofing-related defects are estimated to account for up to 80% of major building defects, despite waterproofing representing only 2–3% of total construction cost. This imbalance highlights how critical proper waterproofing design, installation, and maintenance truly are as highlighted by this article. 

Common Causes of Roof Water Leakage in Malaysia

In practice, water leakage in roofs rarely occurs overnight. They develop gradually due to aging waterproofing materials, thermal movement, poor workmanship, and neglected drainage systems. Blocked gutters are another major contributor. When rainwater cannot drain properly, ponding occurs. This increases hydrostatic pressure on the roof slab, joints, and parapet walls, accelerating waterproofing failure and allowing water to seep into the building structure.

Malaysia’s climate further intensifies the issue. With average annual rainfall exceeding 2,500mm, combined with high humidity and strong UV exposure, roof systems are constantly under stress. Flat concrete roofs commonly used in terrace houses, apartments, and commercial buildings are especially vulnerable when drainage or waterproofing fails.

If left untreated, continuous moisture penetration can lead to spalling concrete, steel reinforcement corrosion, ceiling damage, mould growth, and even electrical safety risks.

How Waterproofing Repairs Roof Water Leakage

To achieve long-lasting results, roof waterproofing repairs must follow a systematic and professional process rather than surface-level patching.

1. Remove Failed Waterproofing Systems

All deteriorated waterproofing layers, such as failed torch-on membranes must be completely removed. Overlaying new materials on top of damaged systems traps moisture and shortens the lifespan of the repair. Exposing the concrete slab allows for proper inspection and corrective work.

2. Locate the Leak, Repair and Seal Cracks

Leak paths are carefully traced, as water often travels beneath the slab before becoming visible indoors. All cracks and voids are repaired using appropriate fillers or repair mortars. In Malaysia, thermal expansion-related hairline cracks are especially common due to daily temperature fluctuations.

3. Clean and Prepare the Roof Surface

Thorough surface preparation is critical. Poor preparation is one of the leading reasons waterproofing systems fail prematurely. Before any waterproofing work begins, the roof surface must be free of dirt, dust, algae, old paint, oil stains, and loose particles. These contaminants prevent the waterproofing material from bonding properly to the concrete, making poor surface preparation one of the main reasons waterproofing systems fail early.

Gutters, downspouts, and drainage outlets must also be checked and cleared. Blockages are often an overlooked but critical factor in roof leakage. When gutters are filled with leaves, soil, twigs, and other debris, rainwater cannot flow freely toward the outlet and downspouts. This causes water to back up and pond on the roof surface, increasing the load on the waterproofing system and accelerating material breakdown. 

4. Apply Nano-G Waterproofing Solutions

Finally, Nano-G waterproofing solutions are applied. One of the most important layers in our waterproofing system is the Nano-G hospital-grade nanotech coating. It seeps into tiny pores and capillaries that other coatings can’t reach, creating water protection from the inside out.

This makes them particularly suitable for Malaysia’s humid climate, where trapped moisture often causes traditional membranes to fail.

Roof leakage should never be treated as a minor maintenance issue. In Malaysia, water leakage in roofs is a leading contributor to building deterioration, especially when waterproofing defects account for the majority of structural failures. A structured and professional repair approach is therefore essential. Proper waterproofing not only prevents recurring leaks but also protects structural integrity, preserves property value, and reduces long-term repair costs.

This is why many homeowners, building managers, and industry professionals rely on Nano-G as a trusted waterproofing solution. Using proven nanotechnology, Nano-G Hospital Grade Nanotechnology waterproofing coating penetrates deeply into concrete to form a durable, breathable barrier that performs well in high humidity and heavy rainfall conditions. Its track record across residential, commercial, and institutional projects conducted for Universiti PertahananNational Malaysia (UPNM), Hospital Putrajaya, and UOB Bank has made it a preferred choice for long-term roof protection. 

FAQs 

1. The leakage happens at my office or business tower rooftop. Do you only handle landed homes and condominiums?

No. We do not only work on residential properties. Nano-G also provides waterproofing and anti-slip solutions for office buildings, commercial towers, industrial facilities, and government institutions, in addition to landed homes and condominiums.

Our team has experience managing large-scale and high-rise projects, including the rooftops of business towers. We understand the challenges of commercial buildings, such as access limitations, strict safety requirements, and the need to minimise disruption to daily operations. Each site is carefully assessed so we can recommend a solution that is effective, safe, and appropriate for the building’s structure and usage.

2. What should I do immediately if I discover a leak?

First, try to stop more damage. If it’s safe, place a bucket or container under the leak to catch dripping water, and move any furniture, electronics, or valuables away from the area. If the leak is near power points, switches, or lights, don’t touch them and consider turning off the power in that area for safety.

Next, take clear photos or short videos of the leak, water stains, or any damaged surfaces and send them to us. This helps our specialist understand the problem faster. Avoid temporary fixes like taping or sealing cracks yourself, as this can trap moisture and make things worse.

3. Is a ceiling stain always a roof leak?

Not always. While ceiling stains are commonly associated with water leakage in roofs, they can also be caused by other issues such as leaking pipes, water seepage from bathrooms or balconies above, or air-conditioning drainage problems.

In some cases, water can travel along the ceiling or roof structure before showing up as a stain. This means the actual source of the leak may be some distance away from where the mark appears, making it easy to misidentify the problem.

For an accurate diagnosis, a professional inspection is recommended. An experienced waterproofing specialist can determine whether the stain is caused by a roof leak, internal plumbing, or moisture seepage, and advise on the right repair solution to prevent the issue from happening again.

4. My roof leaks intermittently. Should I choose spot repair or full waterproofing?

Intermittent leaks usually point to early waterproofing degradation, microcracks, or concealed weak points that only fail under certain weather conditions. While spot repairs may appear cost-effective initially, they often address only the visible symptom. 

A professional assessment helps determine whether the issue is isolated or part of a wider system failure. If moisture migration or multiple ingress paths are detected, full-area waterproofing provides a more reliable and longer-term solution.

Related Articles

A simple guide to the top 5 waterproofing solutions for roof leakage in Malaysia, designed to help you choose the right fix for roof leaks.

Key Takeaways

• Malaysia’s hot, humid, and rainy climate makes roofs vulnerable to leaks, dampness, and mold.
• Roof type, slope, and exposure to sun and rain affect which protection method works best.
• Timely inspections and repairs prevent small leaks from becoming major problems.
• Investing in a reliable solution saves money, stress, and repeated repairs in the future.

Table of Content

1. Introduction
2. Key Factors to Consider When Choosing Waterproofing Solutions
3. Nano‑G Hospital-grade Nanotechnology Waterproofing
4. Polyurethane Liquid Membrane
5. Cementitious Waterproofing
6. PU Injection (Polyurethane Injection)
7. Torch‑On Membrane

Roof waterproofing solutions play a critical role in protecting buildings from long-term moisture exposure, especially when leaks are not always visible or immediate. More than a reactive fix, effective waterproofing solutions for roof leakage works as a continuous protective layer that limits water ingress, preserves the roof structures, and reduces the risk of recurring leakage, dampness, and hidden deterioration over time. This need becomes even more apparent in Malaysia’s tropical environment.

Our country’s tropical climate features humidity levels between 75% and 90% and receives over 2,500 mm of rainfall annually, meaning moisture is constantly present. This puts roofs under continuous water stress, leading to leaks, dampness, mold, and hidden moisture ingress even when it’s not raining. 

A 2025 nationwide survey found that 90% of buildings experience roof leaks due to poor drainage or water pooling, highlighting the urgent need for durable waterproofing systems. 

This article compares five widely adopted waterproofing solutions for roof leakage in Malaysia: Nano‑G Nanotechnology Waterproofing, Polyurethane Liquid Membrane, Torch‑On Membrane, PU Injection, and Cementitious Waterproofing. Choosing the right waterproofing solution is critical to ensuring durability, cost‑efficiency, and long‑term performance.

Key Factors to Consider When Choosing Waterproofing Solutions

When evaluating waterproofing options, homeowners and contractors should consider:

• Roof Type and Slope: Flat roofs vs. roofs with slope require different solutions.
• Exposure to Sunlight and Rainfall: Make sure it can handle strong sun and puddles without wearing out.
• Flexibility and Crack Bridging: Important for structures subject to thermal or structural movement.
• Longevity and Maintenance Requirements: Lifecycle costs may outweigh upfront installation cost.

1. Nano‑G Hospital-grade Nanotechnology Waterproofing

Nano-G Waterproofing uses advanced nanotechnology to protect surfaces from water damage. The solution penetrates deep into tiny pores and cracks within the surface, making it water-repellent from the inside. This creates the hydrophobic effect. It helps prevent water from seeping in while still allowing trapped moisture to escape, reducing common issues like dampness and peeling.

Unlike traditional waterproofing, Nano-G creates a seamless and breathable protective layer that allows moisture to dissipate from the concrete slab, preventing bubbling or blister issues in the future It is also resistant to ultraviolet (UV) exposure, which makes it suitable for Malaysia’s hot climate and frequent heavy rainfall. .

The waterproofing solution is applied in liquid form, allowing it to cover uneven areas, joints, and hard-to-reach sections more easily than sheet-based systems. This makes it one of the more effective waterproofing solutions for roof leakage, especially in complex roof structures. Because it works by penetrating the surface rather than sealing it with a rigid film, it is commonly used on roofs and other building surfaces where long-term durability and weather resistance are important. Read more on Nano-G 6th generation hospital grade nanotechnology waterproofing solution here.

2. Polyurethane Liquid Membrane

Polyurethane (PU) liquid membrane is a waterproofing solution that is applied as a liquid and dries into a single, seamless rubber-like layer. Once cured, it remains flexible and can stretch with the building, helping it bridge small cracks and cope with temperature changes without breaking. 

This makes it effective for roofs that are exposed to heavy rain or occasional standing water. The coating is usually applied in several layers and must be properly cleaned and primed beforehand, especially around drains and corners, to ensure good adhesion. 

Compared to simpler waterproofing systems, PU membranes should be inspected regularly over time. Because of their flexibility and durability, they are commonly used on commercial rooftops that experience frequent heat and movement.

3. Cementitious Waterproofing

Cementitious waterproofing is a simple approach among common waterproofing solutions for roof leakage, using cement-based coatings mixed with special additives to block water from seeping through the roof slab.Because it bonds well to concrete, it is reliable for roofs, especially on concrete roofs that are structurally stable and have minimal movement.

One of its key benefits is ease of application. It is mixed with water and applied as a thick coating, allowing faster installation and fewer application steps. This makes it a suitable option when quick repair is needed.

Cementitious waterproofing is also durable in stable conditions. When applied on roofs with minimal movement, it provides long-lasting protection against water penetration with basic maintenance. It is low-maintenance, requiring only periodic checks and simple touch-ups if cracks appear.

This system works best for non-trafficable concrete roofs, service roofs, and utility areas where flexibility is not a priority, but a strong, straightforward waterproofing layer is needed to control roof leaks effectively.

4. PU Injection (Polyurethane Injection)

PU Injection is a repair method used to stop active leaks by pumping a special liquid polyurethane material into cracks, gaps, and joints in concrete. Because the material is very thin, it can flow deep into small cracks, where it reacts with moisture and expands, filling the gaps and blocking water from passing through. This makes it especially effective for fixing specific problem areas, such as leaking cracks, pipe penetrations, or joints, rather than waterproofing an entire roof surface.

The process requires trained technicians and specialised equipment to inject the material accurately and under controlled pressure, ensuring the cracks are fully sealed. Since only the affected areas are treated, the cost usually depends on how severe and accessible the leaks are, and it is generally more affordable. 

The main advantage is its lower cost, however, the rectification process is messy, involves drilling, and can generate dust and noise. As a result, it is not suitable for hospitals, commercial premises, or homes with elderly occupants and children.

Regular checks are recommended to make sure the repaired areas remain intact over time. PU Injection is most commonly used as a targeted repair solution alongside other waterproofing systems, particularly for concrete roofs or structures experiencing active water leakage.

5. Torch‑On Membrane

A torch-on bituminous membrane is a heat-applied waterproofing system that bonds modified asphalt sheets to a surface to form a continuous, waterproof layer with strong resistance to water ingress. Proper installation must be done by trained professionals due to the use of open flames and the importance of achieving full adhesion. 

In the industry, the two primary types of torch-on membranes are Atactic Polypropylene (APP) and Styrene Butadiene Styrene (SBS). Both are heat-sensitive, bitumen-modified materials favored globally for waterproofing flat roofs, flooring, car porches, and balconies. Routine inspections are advised to catch issues like cracks or separation, and repairs must be carefully sealed. 

Another key point to note is that while waterproofing membranes may seem effective initially, problems can develop over time. These include bubbling from trapped moisture, mould growth caused by ponding water, and water retention on roofs with poor slope and drainage. Proper installation is critical, as the technician must ensure the adhesive is fully melted and securely bonded to the surface to prevent these issues.

This type of membrane is widely used on commercial and industrial flat roofs where a seamless waterproofing solution is needed. In hot, humid climates like Malaysia, installation conditions and UV exposure can affect performance and long-term durability.

While others cast a wide net with conventional methods, Nano-G remains the dedicated specialist in genuine, Greece-imported nanotechnology waterproofing.

In the world of waterproofing, many companies in Malaysia try to be everything to everyone, but Nano‑G isn’t shy about claiming the title of specialist. We’ve honed our Greece-imported nanotechnology waterproofing to perfection, making us the go-to solution for roofs, porches, and concrete surfaces that need long-lasting protection.

With a proven track record across both homes and commercial buildings, Nano‑G has solved countless water leakage problems, and our satisfied clients are proof of our results.

Why waste time juggling multiple contractors or experimenting with trial-and-error fixes that may only patch the problem temporarily? Let Nano‑G take a look at your water stains, leaks, or roof trouble spots, and give your home the invisible, flexible shield it deserves; built to repel water, resist the sun, and stand the test of Malaysia’s heavy rains.

FAQs

1. Is waterproofing necessary even if the leak is minor?

Yes. Even small leaks should not be ignored. While they may seem minor initially, water can gradually seep into the roof structure, ceilings, and walls, leading to hidden moisture accumulation. Over time, this can weaken structural elements, cause timber rot or concrete deterioration, and create conditions for mold and mildew growth, which can affect indoor air quality and occupant health.

Additionally, untreated minor leaks tend to worsen during heavy rain or wet seasons, often resulting in more extensive damage and significantly higher repair costs. Early intervention with a proper waterproofing solution can prevent these issues, protect the building’s integrity, and reduce the likelihood of recurring leaks.

2. The building is occupied. Can waterproofing still be carried out?

Yes. Many modern waterproofing solutions for roof leakage are specifically designed to be applied with minimal disruption, making them suitable for occupied residential, commercial, and institutional buildings. These systems typically involve low-noise application methods, minimal dust generation, and little to no hacking or demolition, allowing daily activities to continue during the works.

Proper planning is essential to ensure safety and efficiency. Works can be scheduled in phases or during off-peak hours, with clear access control and safety measures in place. This approach is particularly important for offices, hospitals, schools, and commercial properties, where uninterrupted operations are a priority. When executed by an experienced team, waterproofing can be completed effectively without requiring occupants to vacate the premises.

3. Can I fix a roof leak without “hacking” or removing tiles?

Yes. With Nano-G Waterproofing Solutions, roof leaks can be repaired without the need to remove tiles or carry out major construction work. This non-invasive approach minimizes disruption to your home or building, reduces dust and debris, and avoids the time and cost associated with traditional “hacking” methods.

4. How do you find a leak without hacking?

On the first inspection, our experts will conduct a thorough assessment using advanced diagnostic tools such as thermal imaging (FLIR) cameras and moisture meters. Thermal imaging allows us to detect temperature differences in the roof or ceiling that indicate hidden water ingress, even in areas where no visible leaks or stains are present. Moisture meters then provide precise readings of water content within structural elements, helping identify damp zones and potential problem areas before they worsen.

5. Once waterproofed, is my roof maintenance-free?

No solution is truly “zero” maintenance, but roofs treated with Nano-G waterproofing solutions come with warranty. If any leaks recur after our repair work, our team will return to patch them promptly.

Our homes take a beating every day from the heat, humidity, and rain all working quietly to wear things down. The roof, being the first line of defense, often gets the worst of it. That’s where roof waterproofing comes in, not as a quick fix, but as protection that strengthens your home from the top down.

A recent joint study conducted by Nippon Paint and Malaysian Institute of Property and Facilities Managers (MIPFM) showed that nine out of ten buildings experience leaks or seepage, with roofs among the most common problem areas.

Limitations of Mainstream Waterproofing Systems

You might bump into “torch on membrane waterproofing’ when finding the solution to your problem. Torch on membrane is one of the most common roof waterproofing methods that is widely used by contractors. But is it the best solution for your roof issues? Let’s find out

1. Installation Method

Torch-on membranes require heating with a torch to adhere to the roof, producing toxic fumes that can harm the respiratory system. Installation is challenging, especially on smaller areas, and must be carried out by a trained professional due to safety risks

2. Durability

Torch-on membrane is fully waterproof but not breathable, so moisture can get trapped, causing bubbles. Contractors often need to pierce and patch these areas to release trapped air.

3. Cost and Maintenance

Torch-on membranes may be cheaper to install, but frequent repairs and reapplications make them more expensive over time.

Another issue with a flat roof is that it is not perfectly flat, so water can pool on the membrane. This leads to dirt buildup, mold, and stubborn stains that are hard to clean.

PU injection is another option but it is less reliable for large surfaces like roofs, as the exact source of the leakage is often hard to pinpoint.

6th Generation of Nanotechnology Waterproofing Solution

Nano-G’s 6th Generation Nanotechnology is the latest breakthrough in waterproofing. It uses extremely small particles that penetrate deep into a material’s pores, forming an invisible, water-repellent (hydrophobic) barrier from within to protect your concrete flat roof.

1. Application Method

Nano-G is applied as a liquid coating that soaks deep into the roof or walls, making it an effective roof waterproofing solution. There is no hacking and burn membranes needed, or disrupt the occupant, making the process fast, clean, and safe.

2. Durability

Because it penetrates the surface and forms a barrier from the inside, it lasts much longer than other solutions. Treated surfaces such as concrete flat roof and walls can withstand heavy rain, sun, and humidity without cracking, peeling, or losing effectiveness over time.

3. Environmentally friendly

Nanotechnology solution is breathable, hence it causes no bubbling issue like torch on membrane, and is patented with Greek Technology. This means our nanotechnology is safe-if-inhaled not only for the occupant, but also our applicator. This marks our dedication to not only providing solutions but also ensuring health, safety, and sustainability.

A Decade of Proven Excellency

For more than 10 years, Nano-G has been delivering reliable, long-lasting waterproof solutions that both homeowners and professionals trust. Among their notable projects are :

1. Commercial Buildings

Situated in Putrajaya, Hospital Putrajaya is a busy government hospital with over 23 years of service. When a leak appeared above their maternity ward, Nano-G stepped in. The team prepared the area and applied the nanotech solution, which penetrates deep to block water from within.

De Palma Hotel also faced persistent leaks in its bathrooms and surau. The team at Nano‑G waterproofed around 120 bathrooms and a surau, and carried out the work with minimal disturbance to guests.

2. Residential

At his home in Klang Valley, Dato AC Mizal was dealing with water leaks and slippery floors, which were a concern for his family. Nano‑G applied their nanotechnology waterproofing across balconies and kitchen areas, giving the family a peace of mind.

DJ Jack Yap’s residence faced persistent water leakage on a flat slab above his bedroom and other parts of his home. Our team inspected the area, found hairline cracks, and applied our nanotechnology waterproofing solution across multiple zones. An additional anti‑slip coating was applied in the bathrooms to improve safety.

Conclusion

With heavier rain and changing weather patterns, investing in high-quality roof waterproofing is no longer optional, it’s essential. With expert help like Nano-G and their nanotechnology solutions, homeowners and builders can now count on smarter, longer-lasting protection

At the end of the day, it’s not just about fixing leaks, it’s also about peace of mind. When your roof is secure, so is everything beneath it.

You’ve fixed it before. Maybe even a few times. You’ve called in contractors, applied waterproofing solutions, repainted the wall or ceiling, and thought it was over. But then, after less than a year, the water stains reappeared and the leak came back.

If that sounds familiar, you’re not alone. Across Malaysia, countless homeowners face the same frustrating cycle: repair, relief, repeat. You fix one area, and weeks later another wet patch appears sometimes in the same spot, sometimes somewhere new. It’s as if water always finds a way back.

Waterproofing continues to emerge as the common problem of leaks. A 2025 study found that 90% of buildings in Malaysia have leaks or poor maintenance issues. This has raised concerns about the safety and long-term value of many properties.

The finding also showed that most problems happen because of old buildings and outdated repair methods, where fixes are only done after the damage has already occurred. Many admitted to delaying waterproofing repairs due to cost, but this often leads to higher expenses later, safety risks, and a shorter building lifespan.

How Leaks Affect Your Surrounding

Getting leaks in your home is something most of us have faced, and it’s never fun. It might seem small at first, but leaks are a sign that something’s not right behind the surface. The harsh truth is, even a small leak can slowly turn into a big problem. This is where professional waterproofing solutions come in to protect your home. Here is what you should expect if leaks are left untreated :

1. Structural Damage

Water that seeps into concrete, walls, or ceilings can gradually weaken a home’s structure, compromising safety over time. For homeowners or real estate agents, persistent leaks also make the property less appealing to buyers or tenants, as they signal water damage and potential maintenance issues.

Water ponding on flat roofs often causes leaks that seep into walls and ceilings.

You’ll notice dark spots on ceilings or walls due to mould, which can trigger allergies or breathing issues, especially for kids or elderly family members.

Unattended water leakage problems often result in mould growth, which can appear on ceilings, affect occupants’ health over time, and reduce the aesthetic appeal of the space.

3. Electrical Hazards

Water exposure is one of the leading causes of electrical fires in homes. When water seeps into wiring, switches, or outlets, it can trigger short circuits and current leakage, significantly increasing the risk of fire. Long-term dampness in walls, roofs, or ceilings can also corrode hidden wiring and damage insulation, potentially causing overheating or electrical arcing, a common ignition source. Keeping all electrical areas dry and properly protected is essential for maintaining a safe home.

The Solution You Can Trust

Enough with the headache and let us help you with modern nanotechnology waterproofing systems. Over the years, Nano-G has continuously refined its waterproofing technology to meet the demanding conditions of Malaysia’s climate.

Through years of research and innovation, we introduced the advanced nanotechnology waterproofing system that was formulated in Greece; a breakthrough that works entirely from the surface without the need for hacking tiles or breaking floors.

The specially formulated waterproofing solutions penetrates deep into the material, sealing it from within to form a durable, invisible barrier that keeps your space clean, dry, and intact. This innovation revolutionised the way waterproofing is done, making it faster, neater, and longer-lasting, while saving homeowners from messy renovation work and downtime.

Proven Records in The Industry

As a pioneer in nanotechnology, what truly sets us apart is not just our advanced waterproofing solutions, but also the recognition and trust we earned from both national and international bodies over the years that marked our commitment and excellence in the field :

i. SIRIM

Nano-G is certified by SIRIM Berhad for meeting Malaysia’s stringent performance and reliability benchmarks

ii. NanoVerify

An agency under the Ministry of Science, Technology and Innovation (MOSTI), verifying that Nano-G’s nanotechnology solutions are scientifically proven and effectively engineered, first of its kind.

iii. Ministry of Health Malaysia

Our nanotechnology solution is acknowledged by the Ministry of Health Malaysia speaks volumes about our reliability and compliance with stringent quality and safety standards.

Leaks might start small, but if left alone, they can turn into bigger problems that cost more to fix later. With the harsh weather and other factors like ageing buildings, proper waterproofing solutions are something every home needs. That’s where Nano-G stands apart. Backed by proven technology, certified quality, and years of industry trust, we deliver lasting protection that keeps your home and property safe, dry, and worry-free.

Water leakage from roofs and ceilings is one of the most common problems faced by homeowners and building managers in Malaysia. With our tropical climate bringing heavy rainfall and high humidity, water leakage in roof systems can easily occur if they are not properly maintained, leaving them vulnerable to long-term damage.

What Causes Water Leakage from Roof or Ceiling?

Water leakage can occur due to broken roof tiles, corroded metal roof, blocked gutters, poor installation, or a lack of maintenance. On flat roofs, water often seeps through hairline cracks, creating hidden entry points that allow moisture to penetrate ceilings and walls.. Because the causes of roof leakage can vary, choosing an experienced contractor is crucial. Only a professional with years of expertise can accurately inspect, diagnose, and recommend effective solutions to stop the problem from recurring.

How to Find the Source of a Leaking Roof

Finding the source of a roof leak is not always straightforward. On flat roofs, the first visible signs of water leakage in roof areas often appear as yellow stains on the ceiling, indicating that water has been seeping in for some time. In areas such as car porches with concrete ceilings, water may travel along beams before becoming visible, so tracing the trail of dampness is best done during or right after rain.

For homes with plaster ceilings, the challenge is greater because the leak is hidden. While some contractors may suggest cutting open the plaster ceiling, Nano-G waterproofing experts use advanced thermal detection devices to pinpoint leaks without damaging your ceiling.

Other common signs include blistering paint, discoloration, and peeling surfaces. While these indicators can help you identify potential problem areas, the most reliable way to inspect and resolve the issue is to engage a specialist who has both the tools and the experience to conduct a proper inspection.

How to maintain and repair flat roofs?

Flat roofs in particular require more attention and maintenance compared to sloped roofs. Their minimal incline makes them prone to collecting leaves, branches, and other debris that trap moisture and accelerate wear. If not removed, this buildup can strain the structure, block drainage, and create the perfect conditions for leaks and water damage.

Regular cleaning and inspections are essential to preserve the roof’s integrity and extend its lifespan. Beyond routine maintenance, applying a protective coating is one of the best ways to prevent water leakage in roof structures. Nano-G’s hospital-grade nanotechnology waterproofing coating is specifically designed to strengthen roof surfaces against Malaysia’s harsh weather conditions, including heavy rain, intense sunlight, and fluctuating temperatures.

By forming a durable barrier, the coating seals small cracks, prevents blistering, and significantly improves the roof’s resistance to water seepage. Because it is odourless, non-toxic, and quick to cure, it can be applied efficiently without disrupting daily life in homes, businesses, or even sensitive environments such as hospitals.

Conclusion

If you notice water stains on your ceiling, balcony, or car porch, it is time to act before the damage worsens. Take photos or notes of the affected areas and share them with your contractor so they can assess the situation more effectively before visiting.

With more than 10 years of proven expertise across residential, commercial, and government projects, Nano-G delivers long-term waterproofing solutions without hacking, drilling, or dusty renovations. Our focus is always on addressing the root cause of the problem and providing lasting protection, giving you peace of mind that your property is safe from recurring water damage.

Related Articles

Living in a tropical country like Malaysia usually has high humidity and frequent rainfall, meaning water leakage and seepage are usually common issues in buildings. Many properties, especially those that are 4 to 5 years of age, tend to show clear signs of water damage. As a result, the waterproofing industry appears to be booming, with numerous waterproofing contractor and solution providers claiming they have the right expertise to fix these issues. But are they truly specialists? And if not, what should you be looking for when hiring one?

Here’s what you need to know before engaging a waterproofing contractor:

1. Understand The Contractor’s Waterproofing Methods

Inquire from the contractor to explain the methods they plan to use in solving your leakage issue. A reliable waterproofing contractor will help you effectively understand the different waterproofing solutions available on the market, such as PU injection, torch-on membrane, or epoxy flakes and why their recommended method is considered most effective for your specific case.

2. Review The Contractor’s Years of Experience

Experience definitely matters, but it’s not just about how long the company has been operating. What’s more important is the kind of problems they’ve solved and how effectively they’ve solved them.

While some waterproofing contractors, especially in areas like KL or PJ, may offer lower pricing, many of them might not have the experience required to address the root cause of the leakage. A cheaper fix might appear to solve the problem at first, but if the solution isn’t tailored to your specific issue, the leak could return and sometimes even worse than before.

A good waterproofing contractor should be able to walk you through the root cause and clearly explain why their solution will prevent future recurrence. The way they communicate their solution can often reflect their level of expertise.

3. Request for The Contractor’s Project Track Record

Fixing water leakage problems can involve a significant cost, so it is important to choose a contractor who can offer a longer-lasting solution. One of the best ways to evaluate this is by reviewing the projects they have completed in the past.

Take time to go through their previous work with them. Ask them to show you examples of similar cases they have handled, explain the methods they used, and how those solutions helped to prevent the problem from recurring. This will give you a clearer picture of how they approach each project and whether they offer temporary fixes or long-term results.

A waterproofing contractor with a strong portfolio of completed work brings more than just credibility. It also gives you peace of mind knowing they have faced similar challenges and delivered results. If they have worked on corporate, commercial, or government projects, that can also be a good indicator of their capability and trustworthiness.

4. Do They Apply Advanced Inspection Tools?

Avoid waterproofing contractors who rely solely on visual inspection or guesswork. Reputable specialists will use technology such as thermal imaging or moisture detection devices to pinpoint the exact source of the leak, ensuring more accurate diagnosis and repair.

5. Beware of the Impact of Tile-Hacking Solutions.

Some contractors may recommend hacking or removing tiles to fix water leakage issues. While this method can be effective in certain extreme cases, it should not be the default approach. Unless the contractor can clearly explain why it is necessary for your specific situation, you should consider seeking a second opinion.

Hacking tiles is one of the most disruptive methods available. It creates a lot of dust, noise, and debris that can affect the comfort and safety of residents or occupants during the repair period. For homes with elderly residents, young children, or individuals with respiratory conditions, the mess and air quality disturbance can be particularly harmful.

Additionally, this method often takes longer, requires more extensive clean-up, and can damage surrounding materials such as waterproof membranes, skirting, or adjoining walls if not done carefully. Once tiles are removed, there’s also the added cost of retiling, colour mismatches, and potentially compromising the aesthetics of your home or building.

6. Why is Nano-G the Trusted Choice?

Today, there are more advanced waterproofing solutions available that do not require hacking or damaging existing surfaces. Technologies like Nano-G’s hospital-grade nanotechnology coatings are odourless, quick to cure, and safe for use in sensitive environments. They provide an effective and far less invasive alternative to conventional methods.

At Nano-G, we bring over 10 years of experience in solving complex water leakage issues. Our proven track record includes major repair projects for government hospitals across Malaysia and high-profile work for the Ministry of Defence.

What sets us apart:

• We use advanced, hospital-grade nanotechnology that requires no tile hacking or change to your flooring’s appearance.
• Our solutions are non-toxic and safe to be used in sensitive environments such as hospitals and confinement centres.
• We rely on scientific inspection methods to ensure every diagnosis is accurate and every repair made effective.

Conclusion

Not every waterproofing contractor is truly a specialist. Before engaging with one, make sure they’re experienced, transparent, and equipped with the right tools, not just offering a quick fix. Whether you’re a homeowner or property manager, investing in a reliable waterproofing contractor like Nano-G ensures a long-term peace of mind and a safer environment.

Related Articles

After 10 years of continuous research, development, servicing, and solving waterproofing issues for commercial & residential buildings across Malaysia, the company announces its 6th breakthrough in technology.

Nano-G is widely known in Malaysia’s waterproofing industry as the pioneer in leveraging the power of nanotechnology to prevent and overcome water leakage issues in homes and buildings. The company uses a water-based, liquid formulation that creates water-repelling protection on treated surfaces. Instead of sealing the porous surfaces with a film or later, the solution penetrates the microscopic capillaries of the surfaces that no elastomer or polymer can reach – to create a hydrophobic effect from the inside out. 

Since its first introduction in 2010, the formulation has evolved over 6 generations after continuous R&D in Greece. 

The superiority of Nano-G Hospital-grade Nanotechnology 6th Generation Waterproofing as compared to other regular or conventional waterproofing solutions in the market can be attested by client testimonials and various regulatory bodies in Malaysia.

Here are 5 validated pieces of evidence of the quality of our nanotechnology solution.

1. The first Waterproofing Solution in Malaysia to receive the NANOVerify certification by SIRIM.

As the industry’s pioneer, Nano-G had invested heavily in nanotechnology solutions even before the term was trending. With a growing interest in nanotechnology in recent years – both globally and locally, we see a rise in false claims by companies and independent contractors promoting their products and solutions as “nanotechnology”. 

To combat the widespread misconception and protect the interest of the scientific community, SIRIM has enforced a set of stringent tests and standards for nanotechnology products and services in Malaysia under NANOVerify,  to undergo various characterization of nanoparticle tests. It is a branch of nanometrology that deals with the characterization, or measurement, of the physical and chemical properties of nanoparticles. 

Nano-G is the first company in Malaysia to receive the NANOVerify certification. The company is awarded the NANOVerified and NANOTrusted marking scheme for labeling and advertising usage. These accreditations serve as an assurance to clients and customers that Nano-G’s solutions are genuine as claimed.

The NanoVerify certifications ensure the genuineness of our Nano-G Nanotechnology Waterproofing Solution.

2. Engineered with a patented Greek Technology with CE quality marking scheme.

Nano-G Hospital-grade Nanotechnology 6th Generation Waterproofing is patented and validated by trusted quality assurance boards in Greece and Europe. The solutions we use bear the CE quality marking scheme, indicating that the formula has been assessed by the manufacturer and deemed to meet European safety, health, and environmental protection requirements.

This modern structural building is The Onassis Cultural Center in Greece. The building complies with European Safety standards to maintain the structures of the building, and their engineers use our Nanotechnology Waterproofing Solution to adhere to the policies.

3. Hospital-grade and environmentally friendly with Green Label certification.

The environmentally-friendly aspect of Nano-G Hospital-grade Nanotechnology 6th Generation Waterproofing solution has successfully gained approval from the Singapore Environmental Council (SEC), which simultaneously represents recognition from the Global Ecolabelling Network.

This green certification is one of the key factors that lead to Nano-G being selected as the appointed waterproofing specialist for all government hospitals across Malaysia. On top of the solution’s safe-if-inhaled and low VOC properties, Nano-G’s non-disruptive waterproofing methods allow hospital employees and patients to carry on with their day-to-day operations and routines.

Our waterproofing solution is eco-friendly and human-safe to ensure the health and safety of our staffs and consumers during and after application.

4. Nanotechnology coating is high breathability and non-film-forming. 

Nano-G’s formula does not create a “plastic film” on the treated surface. Instead, the solution has the same viscosity as water, is invisible and odourless, and creates water-repelling protection from the inside out of the treated surface through deep penetration of the hydrophobic nanoparticles into the pores of the substrates. Since this treatment does not seal the pores, it eliminates any chances of trapped moisture or humidity from beneath or behind the treated surface – and allows moisture to evaporate  through the open pores to relieve negative capillary pressure. In this manner, swelling and cracking of treated surfaces are prevented.

Nano-G Nanotechnology Waterproofing solution penetrates treated surfaces to create a hydrophobic layer inside out.

Non-breathable waterproofing coatings are thick, separate layers applied on top of existing floors. That means trapped moisture are unable to evaporate through the layer, and will instead build up pressure beneath the film – eventually causing bubbling and peeling to occur.

5. Long-lasting, UV-resistant and withstands harsh weather.

Modified surfaces that are treated with Nano-G Hospital-grade Nanotechnology 6th Generation Waterproofing solution are resistant to abrasion, deterioration, or mechanical wear. The modified surfaces are also more resistant to UV radiation damage from the Sun and do not turn yellow over time. These factors combine to demonstrate that treated surfaces exhibit prolonged durability against various weathering and human-use damages.

Nano-G Nanotechnology is a long-lasting waterproofing solution that protects your premise against damages from rain and harmful UV rays.

ENDING

Nano-G Hospital-grade Nanotechnology 6th Generation Waterproofing solution has an impressive track record of success as the most effective water repellent for cement, mortar, grout, porous or natural stone. Ideal for walls and basements, rooftop water repellent, render and stucco protection, mould growth prevention, efflorescence prevention, tile grout sealing, and rising damp protection.

Is your home or building facing a water leakage threat or damage? Contact Nano-G now for a FREE inspection. Our professionals are trained in the technical aspects of the solution, as well as in the area of application and safety.

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