Torch On Membrane Waterproofing in Malaysia – What You Need to Know

Tired of dealing with leaky roofs and water stains on your ceiling every time it rains? In Malaysia, where we get heavy rain and scorching heat, normal waterproofing paints often crack, peel, or wear off over time. That’s why more homeowners and businesses choose torch on membrane waterproofing—a stronger, long-lasting solution.

This method uses a bitumen-based waterproof layer heated with a gas torch to seal surfaces completely, preventing leaks and water damage. It’s more durable than regular waterproofing and withstand Malaysia’s hot sun and heavy rain.

In this guide, we’ll explain how it works, the types available, costs, and when to use it—so you can finally say goodbye to leaks and enjoy a safe, dry home.

Key Takeaways

• Torch-on membrane waterproofing is a durable, heat-bonded method that uses a bitumen-based membrane to prevent leaks and water damage.
• The membrane is heated with a gas torch, allowing it to bond securely to the surface, creating a seamless, long-lasting waterproof barrier.
• If you notice leaks, water pooling, cracks, blisters, or a musty smell, it’s time to apply a heated torch on membrane waterproofing to prevent further damage.
• DIY installation is risky due to fire hazards and the required technical expertise, while professionals ensure proper adhesion, durability, and warranty-backed work.
• Key considerations include weather conditions, surface preparation, safety measures, material quality, and professional installation for the best results.
• The cost typically ranges from RM 10 – RM 15 per square foot, with long-term value in durability, leak prevention, and reduced maintenance costs.

What is Torch Membrane Waterproofing?

@topguardwaterproofing

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Torch on membrane waterproofing is a highly durable and effective waterproofing method that provides long-lasting protection against leaks, water and structural damage in buildings.

It involves applying a bitumen-based membrane to concrete surfaces, such as flat roofs, balconies, and foundations, of commercial buildings, residential properties, and industrial spaces and then heating it with a gas torch to bond it securely.

This forms a flexible and strong protective barrier, making it ideal for areas that experience constant exposure to sun, rain, and standing water—perfect for Malaysia’s unpredictable weather.

Types of Torch On Membrane Waterproofing

There are two main types of torch on membrane waterproofing, each designed for different environments and needs.

Choosing the right one depends on factors like flexibility, durability, and climate conditions in Malaysia.

Type	SBS (Styrene-Butadiene-Styrene) Modified Bitumen	APP (Atactic Polypropylene) Modified Bitumen
Characteristics	– More flexible and elastic, reduces risk of cracks. – Can stretch and move with the surface. – Suitable for cold or moderate climates, but also works in Malaysia for roofs with expansion/contraction.	– More rigid and heat-resistant, ideal for Malaysia’s hot weather. – Provides UV protection and prevents sun damage. – Less flexible than SBS but more durable against extreme weather.
Best For	– Residential buildings – Balconies – Commercial roofs with movement or structural shifts.	– Flat roofs – Industrial buildings – Commercial spaces exposed to high heat and direct sunlight.

Want to protect your home or business from leaks and water damage? Learn more about the importance of roof waterproofing can provide a long-lasting, reliable solution for your property.

5 Essential Steps to Apply Torch On Membrane Waterproofing

Torch on membrane waterproofing requires precision and expertise to ensure a leak-proof and long-lasting installation. The process involves six key steps, from surface preparation to final inspection.

Step 1: Surface Preparation

Before applying the membrane, the surface must be thoroughly cleaned to remove dust, debris, and grease. Any cracks, holes, or uneven areas are repaired to create a smooth and stable base. A bitumen-based primer is then applied to enhance adhesion and ensure the membrane bonds properly.

Step 2: Cutting and Positioning the Membrane

The torch on membrane flexible sheets are carefully measured and cut to fit the surface precisely. Each sheet is then laid out with at least 100mm overlap to prevent gaps and ensure a seamless, watertight layer. Proper alignment at this stage is crucial for maximum coverage and protection.

Step 3: Heating the Membrane

A gas torch heats the underside of the membrane, melting the bitumen and making it sticky. This process allows the membrane to firmly bond to the primed surface, creating a strong and durable waterproof layer.

Step 4: Bonding and Sealing

As the membrane is heated, it is firmly pressed down with a roller to eliminate air bubbles and weak spots. Extra care is taken at seams, joints, and edges to ensure every part is fully sealed and waterproof.

Step 5: Final Inspection

Once applied, the entire area is carefully inspected for gaps, air pockets, or missed sections. A water test may be conducted to verify that the surface is completely sealed, ensuring long-lasting protection against leaks and water damage.

How Long Does the Process Take?

Installation typically takes 1 to 3 days, depending on the size of the area and surface condition.

The membrane needs 24 to 48 hours to fully cure before it can handle heavy use or exposure to water.

5 Clear Signs You Need Torch On Membrane Waterproofing

@topguardwaterproofing

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If your roof or building is showing signs of water damage or leaks, it may be time to consider torch on membrane waterproofing. Recognising these warning signs early can prevent costly repairs and structural damage.

Signs	Causes
Water Leaks & Damp Spots – Water stains on ceilings or walls. – Persistent damp patches indicate moisture seepage.	Harsh Weather Conditions – Heavy rain, extreme heat, and humidity weaken roofing over time. – UV rays cause traditional waterproof coatings to crack.
Cracks, Blisters, or Bubbling on the Roof – Heat and moisture cause the waterproof layer to crack or blister. – Bubbling or peeling means trapped moisture.	Ageing or Deteriorating Roofing Materials – Over time, waterproofing layers wear out, making roofs vulnerable. – Small cracks expand and allow water penetration.
Water Pooling on Flat Roofs  – Standing water after rain signals poor drainage or a failing waterproofing layer. – If left untreated, water seeps through small cracks and worsens leaks.	Poor Drainage & Standing Water  – Clogged gutters or uneven surfaces trap water on the roof. – Prolonged exposure to moisture erodes the waterproof layer.
Mould or Musty Smell Indoors  – A damp, musty odour inside suggests excess moisture in walls or ceilings. – Mould growth can damage structures and pose health risks.	Poor Installation of Previous Waterproofing  – Low-quality materials or improper application reduce durability. – Uneven coverage leaves weak spots where water can seep in.
Ageing or Worn-Out Waterproofing  – Roof waterproofing is wearing out, especially if done years ago. – Older coatings may have cracks or peeling layers, making the roof vulnerable.	General Wear and Tear Over Time – Without regular maintenance, roofs degrade faster. – Torch on membrane waterproofing is a long-term solution lasting 10–20 years.

Wondering what is roof coating and how it protects your property? Learn how roof coating works, its benefits, and why it’s essential for preventing leaks and weather damage.

DIY vs. Professional Torch On Membrane Waterproofing: Which is Better?

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At first, DIY torch on membrane waterproofing might seem like a cost-saving solution, but without the right skills, tools, and experience, things can quickly go wrong. 

Here’s what typically happens when trying to do it yourself—and why getting a professional is the better choice.

What Happens When You DIY?	Why Hiring a Professional is Better
Fire Hazards & Safety Risks Handling a gas torch without training increases the risk of overheating, burning the membrane, or even causing a fire.	Professionals are trained in fire safety, ensuring proper heating control and preventing hazards.
Poor Adhesion & Air Pockets Incorrect heating leads to weak bonding, trapped air pockets, and unsealed edges, which cause water leaks and long-term damage.	Experts ensure even heating and proper sealing, creating a seamless, leak-proof waterproofing layer.
Time-Consuming & Physically Demanding A labour-intensive process that requires precision, patience, and effort—one mistake means redoing everything.	Fast and efficient application, completing the job in 1–3 days without errors.
DIY Can End Up Costing More Initial cost may be lower, but mistakes lead to expensive rework and roof repairs, making it more costly in the long run.	One-time professional installation ensures long-term durability, reducing maintenance and repair costs.

5 Key Factors to Consider Before Using Torch On Membrane Waterproofing

Several key factors need to be considered before applying a torch to membrane waterproofing to ensure proper installation, durability, and long-term effectiveness.

These factors affect the performance and lifespan of the waterproofing system, making it important to plan accordingly.

Factor	What to Consider
Weather Conditions	– Best applied in dry and moderate weather for proper adhesion. – Avoid installation during rainy or extremely cold weather to prevent moisture from getting trapped.
Surface Preparation	– The surface must be clean, dry, and free from dust, grease, and debris. – Any cracks, holes, or uneven areas should be repaired before application. – A bitumen-based primer is recommended to improve adhesion.
Safety Precautions	– Fire hazard risk due to the use of an open flame gas torch. – Installers must wear protective gear like heat-resistant gloves, safety goggles, and long-sleeved clothing. – Proper ventilation is necessary to avoid inhaling bitumen fumes, especially in enclosed areas.
Quality of Materials	– Choose between SBS or APP modified bitumen membranes based on climate and surface needs. – Select the appropriate thickness and reinforcement layers for durability. – Use high-quality primers and sealants to enhance adhesion and longevity.
Professional Installation	– Torch on membrane waterproofing requires expertise for proper heating, bonding, and sealing. – Poor installation can lead to air pockets, weak spots, and water leakage problems. – Hiring professionals like TopGuard ensures a seamless, long-lasting waterproofing system.

Torch On Membrane Waterproofing in Malaysia Price: Is It Worth the Cost?

According to iProperty, the price for torch on membrane waterproofing in Malaysia ranges between RM10 and RM15 per square foot, depending on material quality, labour, and project size.

Many people focus on the cost of torch-on membrane waterproofing, but its long-lasting protection, durability, and future repair savings based on two key factors make it a worthwhile investment despite the higher upfront price.

1. Material Costs

Paying for SBS or APP modified bitumen membrane, bitumen-based primer, and high-quality sealants ensures strong adhesion and extra protection. The thicker and more durable material lasts 10–20 years, reducing the need for frequent waterproofing reapplications.

2. Labour & Installation

Hiring professional waterproofing specialists ensures precise heating, bonding, and sealing with proper safety precautions. A well-applied membrane prevents leaks, air pockets, and weak spots, leading to fewer repairs and long-term cost savings.

Custom quotes, provided by professional services like TopGuard, are necessary for larger or more complex surfaces.

Worried about the cost of fixing your roof? Get a breakdown of residential and commercial roof repair cost in Malaysia and discover the best solutions to protect your property without overspending.

Protect Your Property with Topguard’s Expert Torch On Membrane Waterproofing

Topguard has successfully implemented torch on membrane waterproofing for concrete slab roof across various residential, commercial, and industrial properties in Malaysia.

Here are the following projects we have done to ensure long-term waterproofing, durability, and protection against water damage.

Torch On Membrane Waterproofing for a Residential Property in Setia Alam

Problem

A homeowner in Setia Alam faced waterproofing challenges with multiple flat roof areas, including balcony slabs, rooftop extensions, and terrace coverings. Without proper waterproofing, these areas were at risk of water leaks, structural damage, and long-term deterioration due to Malaysia’s harsh weather conditions.

Solution

Topguard provided a comprehensive torch on membrane waterproofing solution to ensure full protection across the property’s slab areas. The process included:

• Thorough surface preparation to remove dust, moisture, and ensure proper adhesion.
• Application of SBS-modified bitumen torch on membrane for flexibility, strength, and durability.
• Precision heating and bonding to create a seamless waterproofing layer with no air pockets or weak spots.

Result

The entire waterproofed area is now fully sealed and protected against leaks, extending the property’s lifespan and preventing costly water damage repairs. The homeowner can now enjoy peace of mind, knowing their home is safeguarded against rain and extreme weather.

Torch On Membrane Waterproofing for a Flat Roof in Temerloh, Pahang

Problem

A property in Temerloh, Pahang, was experiencing recurring water leakage issues on its flat concrete roof due to prolonged exposure to heavy rain and extreme heat. The existing waterproofing had deteriorated over time, causing water seepage, damp patches, and potential structural damage.

Solution

Topguard Waterproofing was engaged to install a torch on membrane waterproofing system, ensuring long-term protection against leaks and weather damage. The process included:

• Thorough cleaning & surface preparation to remove debris and ensure proper adhesion.
• Installation of a high-quality SBS-modified bitumen membrane to create a strong, flexible, and weather-resistant waterproofing layer.
• Seamless torch application and bonding to eliminate air pockets and weak spots.

Result

Now, the flat roof is fully protected with a durable, weather-resistant waterproofing layer. Thanks to Topguard’s expert installation, the homeowner no longer has to worry about leaks, water damage, or costly repairs—ensuring long-term safety and structural integrity even in Malaysia’s unpredictable weather.

Why Choose Topguard for Torch On Membrane Waterproofing?

• Industry Experts: Skilled professionals ensuring precise application.
• High-Quality Materials: Durable SBS and APP bitumen membranes.
• Seamless & Leak-Free Waterproofing: Long-term protection against rain and heat.
• After-Sales Support & Warranty: Guaranteed workmanship for peace of mind.

Dealing with stubborn roof leaks? Get expert roof leaking repair solutions with Topguard’s professional waterproofing services.

Conclusion

Torch on membrane waterproofing is a proven, durable, and long-lasting solution to protect residential, commercial, and industrial properties from water damage. This system provides a seamless, heat-bonded layer that ensures maximum waterproofing efficiency.

By understanding what torch on membrane waterproofing is, its types, application process, costs, and key factors to consider, property owners can make informed decisions to safeguard their buildings from leaks and structural deterioration.

Waterproofing specialist in Selangor,TopGuard specialises in professional torch on membrane waterproofing services, ensuring:

• Expert installation with premium materials
• Long-term protection against extreme weather
• Seamless, leak-proof solutions tailored to your needs
• Comprehensive after-service support & warranty

Ready to protect your property with a reliable waterproofing solution? Contact Topguard, your trusted waterproofing company in Malaysia, today and let our experts provide you with the best waterproofing services for long-lasting protection.