Basement Waterproofing BS8102:2009


 BS 8102:2009 is the British Standards Institute Code of Practice for the protection of below ground structures against water from the ground.  Its function is to provide guidance and recommendations on methods of dealing with and preventing the entry of water from surrounding ground into a structure below ground level. It applies to structures which extend below ground level and those on sloping sites.


Types and Grades of Waterproofing

The BS8102:2009 standard advises on the types of waterproofing available and confirms the performance grade to be achieved as follows:


Types of Waterproofing:

Type A Barrier protection (tanking)
A barrier to water ingress is applied to the inner or outer surface of the structure. This takes the form of membranes or render applied to the substrate.

Type B Structurally Integral protection
The structure is formed as a watertight construction and requires no additional protection. Integral systems rely on making the concrete itself completely watertight using cementitious methods.

Type C Drained protection
Water entering the structure is received by planned cavities or voids and safely removed. These systems incorporate a drained cavity within the basement structure in order to remove water before it can pressurise the internal dry inner shell with sometimes the need for a sump and pump system.


Grades of Waterproofing Protection:

Grade 1
Some water seepage and damp is tolerable depending on the intended use eg car parks, plant rooms (unless they contain electrical equipment).

Grade 2
No water penetration is acceptable but damp areas are tolerable depending on the end use eg plant rooms, workshops.

Grade 3
No dampness or water penetration is acceptable and ventilation, dehumidifying or air conditioning is necessary, depending on the intended use eg residential and commercial areas such as homes, offices, shops.


Contact us for further information

Using a company who adheres to this legislation is vital as it provides protection to the client against failure of a waterproofing system and ensures supervision and quality control on site.

If you would like further advice and information about our waterproofing design and installation solutions, please contact a member of our team who will be happy to discuss your requirements further.