| Area /Location/ Characteristics | SBS Modified waterproofing membrane | Liquid Waterproofing |
| Difference in Material | 5mm SBS (Sterene-Butadiene-Sterene) Modified Membrane – SBS is one of the families of synthetic rubber. – It was discovered that by properly modifying asphalt or bitumen with SBS, they could create a highly durable elastomeric mix with a very excellent elongation and elastic properties. More than that, the mix would also have excellent abrasion resistance. | Black liquid applied with waterproofing membrane – High polymer emulsion. When cured, it can form a tough, flexible and elastomeric membrane. – Gives better moisture protection and comes with the ease of application. |
| Raft foundation – Mostly used for the foundation of high-rise buildings. Its depth is 16 m to 50m from the ground, but this factor can vary depending on the type and height of the structure. | ● Use SBS modified waterproofing membrane For the raft foundation area, the waterproofing membrane is advisable because it can withstand high water pressure. The raft foundation commonly has a depth of 16m from the ground. This means that the uplift pressure is extreme. Therefore, the material of the SBS modified waterproofing membrane is advisable. | ● Do not use This material cannot retain its shape after being pressed and stretched by the heavy load of raft concrete. |
| Matt foundation – is the foundation used in shallow foundations such as low-rise buildings, malls, supermarkets, etc. | ● Use SBS membrane Although the matt foundation isn’t as deep as the raft, the SBS modified waterproofing membrane is still advisable especially for projects near the seashore. Just like our project, “The Square,” the matt foundation lies at 5m below ground with a water level 2m below ground. | ● Do not use The liquid applied cannot withstand long periods under high pressure. |
| Isolated footing -is used in the foundation of factory buildings, warehouses, residential houses. | ● Use – This is used when the footing is below the water level. The water will surely percolate the footing if there is no SBS modified membrane applied to it. Water ingress would be avoided. | ● Use – If the footing is above the water table then apply this material. – Even if there is no uplift pressure, you can still use this for its practicality. |
| Wet areas such as Kitchen, Bathrooms, Comfort rooms or Toilet | Do not use. – SBS modified membrane is not necessary for these areas. This is because there is not much pressure and the toppings above it are screed and tiles, both of which may tear off the membrane. | Use – It is advisable to use this material because it is less thick. It is 1 mm to 3mm. It will affect the elevation or level of the FFL if you have a thicker waterproofing material. This is one of the reasons why I don’t advise SBS modified membrane |
| Balcony and terrace -of a hotel or high-rise residential building. | Use – SBS modified membrane can be used in these areas. Just make sure that the design of the balcony can accommodate a thickness of 5 or 6 mm of the SBS membrane | Use – This material can be used if you want to avoid complicated installation processes because you won’t need a primer. In other cases, you’ll need to dry out the primer before you can apply the actual waterproofing material. |
| Roof – Roof of a high-rise building or low-rise – Roof deck – Upper roof | Use – Because of the wide area of the roof and the presence of heavy MEP installations, it is advisable to use SBS Modified membrane on the roof. | Do no use. – Roof is an open place and when a heavy downpour comes, this material might not withstand prolonged rainfall. |
| Swimming pool -on high-rise building at roof deck or even at gf. | Use – It is advisable to use SBS modified membrane in this area. Swimming pools contain heavyweight of water above the waterproofing. | Use – Use this material on the 4th layer. This waterproofing will protect the 3rd layer gunite because within gunite there is reinforcement. |
| Attic slab -is made above substation of a high-rise building. Electrical rooms. | Use SBS – The underside of the attic slab is a critical area that contains the substation and the generator. In order to prevent water from falling on the high voltage electrical power, an SBS modified waterproofing is required to be placed in this area. | Do not use – It will possibly leak even though it is still a membrane. It is not like SBS modified. |
| External wall (behind cladding) -this is behind cladding which may be a glass cladding, GRC cladding, or granite cladding. To protect the wall from water ingress, waterproofing is required. | Do not use – Due to the criticality of the application involved with the external walls of a high-rise building, the SBS modified membrane is not advisable. It is impractical to use over external areas with a height of 50 m or above. | Use – It is very practical to use liquid waterproofing in this area because it can be applied with a brush or roller. |
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