Delta Membrane Systems Ltd

The brief for this project was to design, supply and install a bespoke and sympathetic waterproofing solution to a Grade II listed, commercial structure with an impractical damp basement.Delta Registered Installers, MacLennan Waterproofing worked closely with the Principal Contractor, HB Projects to achieve a Grade 3 habitable space whilst preserving this historic structure.The Co-op shop in Petworth Village, provides the local community with everything they need, whether its household essentials or a place to meet friends.The site incorporates two Listed Buildings, including part of a Listed Church. The store applied for listed building consent to reconfigure its ground and basement floors, to increase the retail floor space and improve the functionality of the store.When designing a waterproofing/damp proofing solution in a historic building or a structure of architectural interest, additional design considerations should be employed during the design stage to maintain preserve aesthetic and structural integrity of the structure/building. The waterproofing design should be sympathetic in application whilst offering a robust solution.Care consideration should be applied when specifying products to ensure they are ideally suited for meeting the complexities of listed building requirements.

This large new-build structure required to be waterproofed to meet BS 8102:2009, the British Standard for the Protection of Structures against Water from the Ground requirements. As it is not possible to determine the amount of potential water pressure surrounding the structure, BS 8102:2009 states the waterproofing designer should expect a head of water against the structure at some stage during the structure’s service life.

Vaults are a common feature of 18th and 19th century buildings in Bath. Originally built to support the cobbled streets above and were a constructional response to the precipitous topography that surrounds Bath, in order to provide a level site. Many of the vaults within historic Bath suffer with water ingress and damp related problems. Incorporating best practice guidance - Type C Waterproofing Systems (BS 8102: 2009) a Type C System was used to keep this historic vault watertight and dry.

When specifying the most appropriate method of waterproofing for a new-build basement it is advisable to follow the recommendations within BS 8102:2009 ‘Code of Practice for Protection of Below Ground Structures Against Water from the Ground’. The standard advises on the types of waterproofing available and confirms the performance grade to be achieved. This project required Grade 3 protection – no dampness or water penetration acceptable.

An innovative and comprehensive waterproofing solution was required to facilitate a £18m state of the art hotel and with a double story basement in Englefield Green, near Windsor. The hotel will offer exceptional overnight breaks, award-winning dining & an exclusive spa facility once completed.