- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 05 Oct 2020
Tanking is a term used for creating a tank-like seal to protect walls against water penetration. The Building Regulations stipulate that tanking must be applied to all new build structures below ground, but tanking can also be applied to existing buildings, to prevent water penetration into basements and cellars, as well as helping to tackle rising damp.
The two main methods of tanking are by using a membrane or a coating. The type of damp and the precise requirements of the building will determine the most appropriate method to use, and sometimes a combination is required to ensure walls remain dry.
The studs create an air gap cavity between the wall and membrane. Where there is no visible water in the cavity, ventilation may be adequate to prevent the accumulation of moisture. Where water is present, drainage or a or sump and pump may be necessary.
Liquid bitumen is painted onto cleaned masonry or render but is best for smaller jobs or for coating externally below the damp-proof course. It can prove difficult to apply to masonry in older buildings as it can separate from the wall if applied incorrectly.
 Related articles on Designing Buildings Wiki
Featured articles and news
ECA proposes strategies for the present and the future.
Paul Morrell to lead independent review of the construction products testing regime.
Standard will help employers foster wellbeing and manage psychosocial risks.
Global fire standards for safety of people and property.
An introduction to the 5 core principles of lean.
Can the profession use its skills to save the world from climate change?
How faulty science resulted in sanitation reform.
Improving facilities, accessibility and overall appearance.
Free download of TG 12/2021 available.
TESP works with The Youth Group to form skill sharing network.
Big tech collaborates on platform for the built environment.
Letter signed by 21 organisations sent to MHCLG.
A look at the Government's strategic approach.
Steps to help reduce the spread of infection inside buildings.
Click the button to subscribe.