- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
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
Exploring the key to the adoption of this abundant energy source.
His clients have ranged from Liberace to St Nick to world-class athletes.
These tactical structures can be permanent or temporary.
Organisation recognises milestones of the project's next phase.
Welding and metalworking businesses must manage respiratory risks.
New report explores how regulations are being put into action.
The golden thread and BS 8644-1.
Bitumen binder may delay road surface deterioration.
A varied portfolio of internationally recognised buildings.
Threatened by housing and expanding universities.
Getting "boots on the ground" to make things happen.
Building systems may begin to learn.
CIOB to recognise Client of the Year and Team of the Year.
PAS 9980 PAS 9980:2021 addresses fire risk appraisal and assessment.