New Build Basement Waterproofing System – Manchester

Longstanding clients of ours, CSC Construction Limited of Stockport requested our specialist advice in connection with the design and installation of a waterproofing system to a bespoke new build private dwelling in Manchester for a local Doctor.

Following discussions with the Architect the design and waterproofing system was agreed, and regular site visits were made by our attending Surveyor in order to assess ground conditions during the plot excavation.

Once construction was at a suitable stage, the installation of the internally applied Delta Cavity Drain Membrane system commenced, having ensured that the main contractor formed a perimeter chase within the reinforced concrete basement slab, this allowed for the installation of the serviceable floor wall drainage channel, laid upon a bed of pea gravel. The drainage channel discharged into a purpose made external brick inspection chamber, complete with non-return valves.

All the internal ground retaining walls were then lined with Delta Cavity Drain Membranes, prior to the installation of the Delta flooring membrane, the fresh concrete base slab was sealed with a Silicic Acid to prevent free lime leaching out of the concrete slab.

Upon completion of the Tanking System compliant to BS 8102 2009, closed cell insulation boards were laid over the floor membrane, followed by a screed containing under floor heating, the walls were lined with an independent metal framework, insulated, plaster boarded and skim plaster finished.

Prior to installing the Tanking System, CSC’s site agent Paul regularly had to pump out in excess of 300mm of ingressed ground water every Monday morning, needless to say Paul is more than pleased with the results, as are CSC and the client.