A large basement extension on a site by the cliff edge at Swanage. The site was permanently wet.

To comply with BS 8102 the ground had to be drained by means of pumps, sumps and land drainage. The outside of the building was protected with MACLENNAN-LSE WATERPROOFING Geo Drain installed over the walls and draining to land drains at the toe of the footing.
 
The inside was lined with System 500 on the walls and MS 20 on the floors.
Drainage channel was installed around the wall floor join to large pumps installed by the clients engineers.
The installation was guaranteed by the GPI Insurance for a period of 10 years.