The Difference Between Tanking & Waterproofing

When it comes to turning a basement or cellar into a dry, habitable space, understanding the disparity between tanking and waterproofing is crucial. Tanking typically involves applying a specific coating or membrane—referred to as barrier protection—while waterproofing encompasses a broader range of methods, including barrier, integral, and drained waterproofing systems. At Clever Shield, we offer solutions for both approaches and often advise combining systems for optimal water protection.

Basement Waterproofing, in essence, involves employing various waterproofing methods to prevent moisture from infiltrating basements or cellars. This can include installing a 'Type C' Cavity Drain System, which effectively manages seeping water by channeling it towards a pump or safe drainage system.

On the other hand, Basement Tanking entails applying a membrane or coating to either the interior or exterior of the structure. This application serves to prevent water ingress into the livable areas, rendering the basement watertight. In industry terms, this falls under 'Type A' waterproofing.

Now, does tanking effectively halt rising damp? Tanking, along with waterproofing, becomes necessary when a structure is situated below ground level, exposing it to water penetration from the surrounding soil. Rising damp, however, primarily affects walls above ground, where moisture ascends through capillaries in the wall fabric.

Common treatments for rising damp involve chemical damp proof courses and specialised renders or cavity membranes, which create a barrier against moisture.

Before embarking on any damp proofing endeavour, it's essential to have your property inspected by professionals. They can assess the extent of moisture-related issues and recommend suitable solutions to ensure long-term dryness and structural integrity.

When it comes to tanking and waterproofing existing properties, several options exist:

1. Cavity Drain System: This comprehensive solution incorporates waterproof membranes, drainage, pumping, and control systems to manage water ingress effectively.
2. Tanking Membrane, Coating, or Slurry: Applied to halt groundwater intrusion into the building.
3. Combination Approach: Utilising both tanking and cavity drain systems for enhanced protection, particularly in highly porous structures.

For maximum safety and effectiveness, we advocate incorporating a Cavity Drain System as part of the waterproofing strategy. Unlike tanking membranes, these systems are less susceptible to issues like poor installation or damage, ensuring consistent protection against water ingress.

Adhering to the recommendations of the British Standard for Waterproofing (BS 8102:2022), we emphasise the importance of maintainable 'Type C' Cavity Drain Membrane Waterproofing. This approach, which utilises accessible drainage channels and inspection ports, aligns with industry standards and is essential for meaningful guarantees and compliance with building insurance requirements.