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Premkumar Subramaniyan
Waterproofing in construction is a process to ensure that the structural component is water tight which means that the structure will 100% prevent the entry of water which comes into contact with the external face of the structure.
https://www.newtonwaterproofing.co.uk/wp-content/uploads/2019/12/System.jpeg
There are three general types of waterproofing
Type A - Tanked protection
Type B - Structurally integral protection
Type C - Drained protection
As per the geological condition of the proposed site it seems that the ground will have a high-water table and there is an adjacent river as well so it will be better to go with combined method of type A and type B waterproofing making the structure itself water and providing an additional layer of water proofing as well.
After the construction of basement floor slab the surface is well prepared the water proofing membrane installation. The waterproofing membrane will be bitumen membrane which can be bind with the structure by providing a suitable primer (Binder). The bitumen sheets act as the Damp Proof membrane in this case. Once, the water proofing membrane installation is done a layer of protective screed is provided to protects the membrane damages. The screed thickness may be around 100 to 150mm.
Type A Tanking protection
https://www.designingbuildings.co.uk/w/images/d/d7/Basements1.jpg
Type B Structurally Integrated protectionhttps://www.designingbuildings.co.uk/w/images/6/68/Basements2.jpg
Basement floor with Bitumen membrane
Source: https://www.newtonwaterproofing.co.uk/wp-content/uploads/2019/11/520_2.jpg
Advantages of Bitumen membrane
Easy installation.
Provides high resistance moisture penetration.
Cost effective when compared to other components
Works efficiently at higher water table conditions.
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