Type C waterproofing is defined in BS 8102: 2009 as ‘drained protection’. This is achieved by the incorporation of a drained cavity within the basement structure. The basement wall must provide enough primary resistance to water ingress to ensure the cavity only accepts a controlled amount of water or dampness. Water is collected in the cavity, between the external wall and an internal lining (cavity drain membrane), and diverted to a suitable drainage point.
Triton supplies a comprehensive range of pumps and cavity drainage components, designed to complete a fully drained waterproofing system.
The use of cavity drain membranes does not allow pressure to build up against the internal construction. The air gap allows the structure to breathe and, to some extent, dry out. Cavity drain membranes are laid on floors and fixed to walls using special plugs and sealing materials, with little or no preparation required to the substrate. Once the membrane has been fitted, wall surfaces can be dry lined or plastered directly, and floors can be screeded or a floating dry board system installed.
Platon P8 is used as a waterproofing drainage layer applied to the inside face of basement and below ground walls and floors within a drained cavity membrane system. P8 is manufactured from High Density Polyethylene and is impermeable to water, water vapour or Radon gas.
P20 is a high capacity drainage membrane recommended for use on all floor applications below ground due to its ability to control free flowing water. The deep stud profile is designed to resist blockages caused by lime deposits.
Platon P20 is most often incorporated within the basement floor build-up and can be used above or below suitable closed cell insulation (contact the Technical Department for guidance), to accommodate the requirements for Aquachannel drainage. P20 is used in conjunction with Platon Sealing Rope, Overtape and Cornerstrip.
Cavity Drain Membrane for internal use. Platon Plaster Base can be installed on internal walls and vaulted ceilings above or below ground level. The substrate remains visible through the clear membrane for precise fixing. It is suitable for use with sand and cement renders and most lightweight and renovating plasters.
Platon Plaster Mesh is a double layered cavity drain membrane comprising a studded HDPE layer bonded to an ‘HDPE twist’ mesh layer which forms a key for most common plasters and renders. As with other Platon membranes, Platon Mesh can be fixed directly to existing wall finishes without the need for extensive hacking off or preparation.
A 3mm polypropylene cavity drain membrane suitable for direct plastering. Suitable for use as an isolating plaster membrane following remedial treatments.
Drainage and protection cavity membrane used externally against retaining walls and across terraces and podiums. Platon Double Drain protects the primary waterproofing membrane from damage during back-filling or covering whilst maintaining a clear space which allows water to de-pressurise and drain freely. Platon Double Drain is used in conjunction with a maintainable land drain to reduce the risk of water pressure build up as part of a specification which can comply with the guidance laid out in BS 8102:2009.
Triton supplies a full range of fixings and other ancillary products used in the installation of Cavity Drain Membrane systems. This range includes an Anti-lime Coating designed to seal concrete surfaces and to prevent the leaching of ‘free lime’. Prior to installation please download the ‘Platon Fixing & Sealing Product Calculator’ below.
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