A roof is an essential component of a building as it protects the interior from natural elements such as rain, wind, and snow. However, a roof can also become a liability if it leaks, causing damage to the interior and compromising the building’s structure. To prevent this from happening, it’s important to have a waterproof roof. In South Africa, there are various types of roof waterproofing options available, which are suitable for different roof types.
Roof Types That Need Waterproofing
There are different types of roofs that require waterproofing, including flat roofs, parapet roofs, decking, and others. Flat roofs are particularly susceptible to water damage as water pools on the surface instead of running off. Parapet roofs are also vulnerable to water damage as they often have poor flashing and improper drainage systems. Decking roofs, which are used for outdoor spaces like balconies and terraces, also need waterproofing to prevent water from seeping through the joints and into the interior.
Types of Waterproofing Used in South Africa
Liquid-Applied Membrane (LAM)
Liquid-Applied Membrane is a popular choice for roof waterproofing in South Africa. It is a monolithic, fully-bonded, liquid-based coating that can be applied to many substrates, including asphalt, bitumen, and concrete. The coating forms a rubber-like elastomeric waterproof membrane that is ideal for exposed roofs with many complicated details and penetrations. It is cost-effective, especially for roof renovations and repair projects, and is durable, easy to apply, and rapid-curing.
Bitumen Torch-On Membranes
Bitumen Torch-On Membranes are a type of waterproofing membrane that is made from a special grade of bitumen that has been modified with APP polymers. The APP polymers enhance the thermal, mechanical, and aging properties of the membrane, while the tensile strength, tear resistance, puncture resistance, and elongation properties are established by the polyester reinforcement. Bitumen Torch-On Membranes can be used in single or multi-layer systems for waterproofing flat or pitched roofs, underground structures, and for waterproofing wet areas and mechanical rooms.
There are different types of Bitumen Torch-On Membranes available, including NiloPlast 5 PX 3mm Sand, BituPlast 5 CP Sand 4mm, and BituPlast 5 CSM 4.5 Kg/m² – Mineral Grey. Each type has its own unique properties and is used for different waterproofing applications.
Liquid Spray Waterproofing
Liquid roofing is the process of waterproofing a roof by applying a hydrophobic liquid roof coating. This method of waterproofing has a history dating back to the 1800s and has been improved upon over the years with the introduction of different materials. The liquid roof coating applied is a monolithic, fully bonded, and liquid-based material that cures to form a rubber-like elastomeric waterproof membrane. This membrane is capable of stretching and returning to its original shape without damage and is usually reinforced with secondary materials for additional tensile strength. Liquid roofing can be applied to most roof styles, including flat, pitched, and domed roofs, and can be applied over traditional roofing materials such as felt, asphalt, bitumen, and concrete. Liquid spray-applied roofing membranes have become one of the fastest growing roofing systems in North America and Europe.
In conclusion, roof waterproofing is crucial in South Africa to protect buildings from water damage. There are different types of roof waterproofing options available, including Liquid-Applied Membrane and Bitumen Torch-On Membranes, which are suitable for different roof types such as flat roofs, parapet roofs, decking, and others. When choosing a waterproofing solution, it’s important to consider the specific needs of your roof, the environment, and the budget.
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