Frequently Asked Questions (FAQ)
Others
Choosing the right solution depends on your building condition, usage environment, problem severity, and long-term performance goals. At Pan Asiatic, we recommend starting with a site assessment to identify the actual cause before proposing a solution. Different conditions require different systems to achieve the best durability and cost efficiency.
As a general guide:
1. Water leakage issues → Waterproofing systems for roofs, exposed areas, concealed areas, localised repairs, or chemical injection solutions.
2. Cracks, concrete deterioration, or façade defects → Structural and façade repair solutions including crack injection, concrete repair, protective coating, and strengthening systems.
3. Rusting or ageing metal roofs → Metal roof coating systems designed to reduce corrosion, extend roof lifespan, and minimise replacement costs.
4. Factory, warehouse, or industrial floor requirements → Industrial flooring systems such as epoxy, polyurethane, methacrylate, or cementitious flooring depending on operating conditions.
5. Sports facility upgrades or maintenance → Acrylic-based court resurfacing solutions for tennis and multi-sport courts.
As a general guide:
1. Water leakage issues → Waterproofing systems for roofs, exposed areas, concealed areas, localised repairs, or chemical injection solutions.
2. Cracks, concrete deterioration, or façade defects → Structural and façade repair solutions including crack injection, concrete repair, protective coating, and strengthening systems.
3. Rusting or ageing metal roofs → Metal roof coating systems designed to reduce corrosion, extend roof lifespan, and minimise replacement costs.
4. Factory, warehouse, or industrial floor requirements → Industrial flooring systems such as epoxy, polyurethane, methacrylate, or cementitious flooring depending on operating conditions.
5. Sports facility upgrades or maintenance → Acrylic-based court resurfacing solutions for tennis and multi-sport courts.
1. Roof Shape and Complexity
Torch-on membranes are ideal for large, flat, lesser obstructed surfaces.It can be difficult and risky to install around complex details like air conditioning units, vents, Service pipes and sharp angles.
Liquid-applied systems perform better on complex roofs with many pipes, drains, or corners. Liquid-applied systems such as polyurethane coating or acrylic coating can flows into tight spaces. It creates a seamless, monolithic coat that wraps perfectly around difficult shapes and penetrations.
2. Safety Considerations
Torch-on membrane demands the use of open-flame gas torches to melt the bitumen into place. It is dangerous—or even prohibited—if your roof is close to combustible materials.
Liquid-applied membrane are "cold-applied" coatings rolled, brushed, or sprayed onto the surface, requiring no open flames, making them safer for roof close to combustible materials.
3. Application Time and Curing
Torch-on membrane once torched and cooled, it provides an immediate waterproof seal.
Liquid-applied membrane takes longer to apply because you must wait for each of the multiple coats (usually 2 to 3) to dry and cure, which can take several hours depending on local humidity.
Torch-on membranes are ideal for large, flat, lesser obstructed surfaces.It can be difficult and risky to install around complex details like air conditioning units, vents, Service pipes and sharp angles.
Liquid-applied systems perform better on complex roofs with many pipes, drains, or corners. Liquid-applied systems such as polyurethane coating or acrylic coating can flows into tight spaces. It creates a seamless, monolithic coat that wraps perfectly around difficult shapes and penetrations.
2. Safety Considerations
Torch-on membrane demands the use of open-flame gas torches to melt the bitumen into place. It is dangerous—or even prohibited—if your roof is close to combustible materials.
Liquid-applied membrane are "cold-applied" coatings rolled, brushed, or sprayed onto the surface, requiring no open flames, making them safer for roof close to combustible materials.
3. Application Time and Curing
Torch-on membrane once torched and cooled, it provides an immediate waterproof seal.
Liquid-applied membrane takes longer to apply because you must wait for each of the multiple coats (usually 2 to 3) to dry and cure, which can take several hours depending on local humidity.
The most economical way to fix a leaking concrete roof depends on the damage.
For minor, localized leaks, Polyurethane (PU) Injection Grouting are the most cost-effective methods. PU Injection Grouting is ideal for filling specific, active cracks without treating the whole roof. A technician drills holes along the crack and pumps in liquid polyurethane, which expands inside the concrete to block water.
For widespread deterioration, either Exposed Torch Applied Waterproofing Membrane or exposed Liquid-Applied Membrane (LAM) are generally the most economical and practical solution for rewaterproof old roofs. These exposed system applied directly over the prepared roof slab, reducing labor, time, and material costs.
For minor, localized leaks, Polyurethane (PU) Injection Grouting are the most cost-effective methods. PU Injection Grouting is ideal for filling specific, active cracks without treating the whole roof. A technician drills holes along the crack and pumps in liquid polyurethane, which expands inside the concrete to block water.
For widespread deterioration, either Exposed Torch Applied Waterproofing Membrane or exposed Liquid-Applied Membrane (LAM) are generally the most economical and practical solution for rewaterproof old roofs. These exposed system applied directly over the prepared roof slab, reducing labor, time, and material costs.
