Proofex Cavitydrain membranes are manufactured from chemically resistant high density polyethylene in a range of stud depths designed to permit high water flow through a permanent void formed against a substrate. A range of grades are available.

• Proofex Cavitydrain 80 is a space saving solution for vertical applications in conjunction with internal blockwork walls and dry lining systems
• Proofex Cavitydrain 200 is primarily used for horizontal applications, it can also be used in vertical applications where increased membrane stiffness is required
• Proofex Cavitydrain PB allows the direct application of wet lining systems, increasing usable space in basements by eliminating the requirement for internal blockwork walls or dry lining systems
• Proofex Cavitydrain PM20 is a mesh faced damp proofing membrane applied to internal wall surfaces in above ground areas to provide protection against rising damp. It is particularly suited for areas where intrusion into the habitable space must be minimised, such as doorways and window reveals

To enable a fully compliant system installation, the Proofex Cavitydrain system incorporates a full range of ancillary items including drainage channels, fixings, sealing strips, pumps and anti-lime coating.

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• Features & Benefits
• Application Notes
• Limitations

Features & Benefits

• Suitable for new and existing construction projects
• Acceptable for all water table classifications (low, variable, high) as per Table 1 of BS8102-2009
• Eliminates increase in structural load due to water pressure
• Provides a maintainable form of ingress protection
• Can be specified in conjunction with a monitoring system to provide automatic alerts in the event of pump failure
• Internal application in a controlled environment reduces risk of defective installation
• Provides a continuous drainage pathway and vapour barrier
• Minimal deformation under load maintains drainage performance
• Conical voids enable high load transfer to structural elements
• Chemically resistant, unaffected by contaminated substrates and chemicals typically found in groundwater
• Vertical and horizontal grades available
• Please refer to the Product Data Sheet for full details of:
  
  • Specification Clause
  • Properties
  • Application Instructions
  • Storage
  • Health and Safety

Applicaton Notes

• Refer to Proofex Cavitydrain method statement and BBA certificate for full application instructions
• Application may require the use of Proofex Cavitydrain Pump Kit (SB/DB). Please call 0113 2455450 (option 2) or send a message to [email protected] if in doubt
• Can be applied vertically or horizontally. If installing horizontally, the overlaps should be such that the lower of the membrane sheets is positioned in front of the upper
• Place membrane against wall (studs facing wall) and drill through a cuspation at the top left corner using a 10mm masonry drill bit. Wrap Proofex Cavitydrain Sealing Rope just below the head of a Proofex Cavitydrain Brick Plug (alternatively use a Proofex Cavitydrain Brick Plug Seal). Hammer (use of a lump hammer is recommended) the Proofex Cavitydrain Brick Plug through the membrane into the drilled hole so that it seals into the cuspation
• Any dust will compromise the seal integrity. Brick / plaster dust should be washed off with clean water and dried with lint free cloths. Adding detergents to the cleaning water is not recommended
• Apply Proofex Cavitydrain Sealing Tape in a vertical orientation to the overlapping sheet between the studs
• Where pipes or ducts protrude through walls, cut a hole in the membrane to tightly fit around the entry. Seal the gap with a combination of Proofex Cavitydrain Sealing Rope and Proofex Cavitydrain Corner Strip
• Roll size: 2.07m x 20m

Limitations

• Not suitable for use in below ground situations where the cavity membrane system cannot be drained
• Not recommended for external applications
• Point loading of the drainage sheets should be avoided to prevent localised deformation. E.g. loading bearing walls should be constructed off a load spreading screed / topping or directly off the concrete base. A structural engineer should be consulted for detailed advice
• Each Proofex Cavitydrain roll weighs approx. 20KG and should be lifted by a minimum of two site operatives