Cavity Membrane and Drain
The basement in this Large Wiltshire House flooded most years. Petra Developments needed to dig the basement out by a further 800mm to increase the head room for accommodation, MacLennan were brought in to waterproof the existing basement project.
MacLennan were contacted by Adams Architecture who we regularly work with on Projects to provide a waterproofing design, for this large detached property in Hampstead. The design was for a Cavity Drain System to the main basement and MacLennan’s own Polyprufe Deck waterproofing system to the 500sqm Terrace area.
Bank Side London
MacLennan were asked to consult on the design of the waterproofing of this very large commercial building. MacLennan were engaged to draw up all of the waterproofing details. There were a great many issues with water penetration into the excavation which MacLennan had to overcome.
The system used was the MacLennan internal cavity drain and Radon gas waterproofing membrane system, designed by us to be used as a combined water and gas proofing system. This Property was a new build in Cornwall. As a basement was being included in the property the main contractor requested that MacLennan provide a waterproofing design, supply and fit. Cornwall has a high instance of Radon gas which can be lethal, so MacLennan also ensured that all membrane and channelling was sealed as per radon requirements.