In Malaysia’s tropical climate—characterized by heavy rainfall, strong UV exposure, and high humidity—choosing the most durable waterproofing system for concrete roofs is crucial. One of the most widely used and reliable solutions is the Torch Applied Waterproofing Membrane, commonly known as torch-on membrane waterproofing.
Torch applied waterproofing membrane is a waterproofing system that uses modified bitumen sheets (usually 3–4 mm thick) that are heated with a gas torch and bonded directly onto the concrete surface. The heat melts the bitumen backing so the membrane fuses tightly with the roof slab, forming a strong waterproof barrier.
Once installed, the membrane creates a continuous, impermeable layer that prevents water penetration and protects the building structure from leaks and moisture damage.
This system is commonly used on:
Concrete flat roofs
Commercial building rooftops
Balcony slabs
Car porch slabs
Industrial roofs
Malaysia’s weather puts extreme stress on building roofs. Torch-applied membrane performs well because it is designed to withstand tropical conditions.
Malaysia experiences frequent and intense rainfall. Torch-on membranes create a fully bonded waterproof layer, preventing rainwater from seeping into concrete slabs.
Roof temperatures in Malaysia can exceed 40°C, especially on exposed concrete roofs. APP-modified membranes are designed to handle high heat and UV exposure without deteriorating quickly.
Compared with many liquid waterproofing coatings, torch-on membrane systems typically last 15–20 years or more when properly installed.
Polymer-modified bitumen membranes (SBS or APP) allow the system to expand and contract with building movement, reducing the risk of cracks.
Flat roofs are prone to water ponding, which can quickly damage weaker waterproofing coatings. Torch-on membranes are thick and durable enough to handle standing water and prolonged exposure to moisture.
Two common types are used in Malaysia:
APP (Atactic Polypropylene) Membrane
Highly resistant to heat and UV
Suitable for exposed rooftop areas
Ideal for Malaysia’s hot climate
SBS (Styrene-Butadiene-Styrene) Membrane
More flexible and elastic
Better for areas with structural movement
Both types provide strong waterproof protection but are selected depending on the roof conditions.
Key benefits include:
Durable waterproof protection
Strong adhesion to concrete surfaces
Resistant to UV, heat, and rain
Long lifespan (15–20 years)
Low maintenance after installation
Ideal for commercial and residential concrete roofs
Because of these advantages, torch-on membrane remains one of the most preferred waterproofing systems for concrete roofs in Malaysia.
Conclusion
For buildings in Malaysia—especially commercial buildings and flat concrete roofs—the Torch Applied Waterproofing Membrane system is one of the most durable waterproofing solutions available. Its thick bitumen membrane, strong adhesion, and resistance to tropical weather make it a long-lasting option for preventing roof leaks and structural water damage.
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