Basement Waterproofing System
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Waterproofing below ground level i.e basements, cellars etc. is often referred to as ‘tanking' Tanking works can be carried out in different ways to ensure a waterproofed/ dry space. Every basement is different so we find it prudent to perform a site survey to ensure that the best method is chosen in each case.
Cavity Drain Membrane Systems
Cavity drain membranes provide an alternative to conventional cementitious tanking systems, which work by holding water back. Cavity drain membranes work on the principal of allowing water to continue to penetrate the structure but control it in the air gap and divert it to a suitable drainage point or pump (if required).
They do not allow pressure to build up against the internal construction and the air gap behind the membrane allows the structure to ‘breathe' and to some extent dry out. The membranes are impermeable to water, gas and water vapour, thus protecting the basement internal space from dampness. The membranes are loose laid on floors and fixed to walls using special plugs and sealing materials.
The membranes can be fitted with little or no preparation to the substrate and once fitted, wall surfaces can be dry lined or plastered directly and floors can be screeded or a suitable dry board system installed.
This method of basement waterproofing allows decoration and floor finishes to be completed almost immediately, without long drying out periods.
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Cementitious Coatings
This system is a specialist waterproofing render/ multi-coat slurry that can withstand the external water pressure present in a basement. Once installed it maintains a dry environment by creating a physical barrier to water entering the basement area.
Cementitious coatings can be applied direct to the substrate but does require extensive preparatory works to ensure that a good key is available to bond the materials. Multicoat render applications can be installed with several interim coats, increased to degrees of water pressure resistance required
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