Structural Waterproofing

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Patterson Construction would always recommend that two barriers are used to prevent water ingress.

The first barrier is to prevent water flow which can be in sheet form with a sodium bentonite like Voltex-DS, to form a monolithic, high swelling low permeable membrane. This membrane bonds to the concrete when the geotextile fibres are encapsulated in the wet concrete.

Another membrane we use is a composite sheet of thick HDPE with weather resistant protective coating which bonds to the wet concrete to provide a robust barrier to water, moisture and gas.

A third alternative is a waterproof additive to the concrete when well compacted, and used with water bars to the joints, which will prevent water ingress


Waterpoofing 3


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We would like to thank Patterson Construction Limited for the smooth, efficient and speedily carried out façade retention, demolition, underpinning and raft slab to our Oxford Street project. We look forward to working with their team again in the future.
Emperor Group

We have worked with Patterson Construction for a number of years on varied contracts and have found them to be very professional and thorough in all aspects of the work involved. We have learned a lot from their problem solving initiatives on difficult contracts through to their steadfastness in ensuring contracts completed on time.

We worked with Patterson Construction Limited on a very complex basement in Shoreditch. PCL went down 2 levels in concrete and waterproofing and up 4 levels in steel. There were numerous problems on the project and they overcame each and every one. We now have a very successful hotel and restaurant and I would recommend these guys to any main contractor.
Neil Crow, Soho House

Having worked with Patterson Construction on several contracts over a number of years, they have always maintained a professional and efficient working relationship with our company.
Eamonn Malone, Thames Materials

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