Visqueen Radon Sump is required when full radon protection has been identified. The sump can be used in solid ground floor concrete slab applications and ventilated sub floor void applications.

Depending on the permeability of the soil type, the sump can draw the harmful radon gas from a radius distance of approximately 7m i.e. providing protection to an area of approximately 150m².

In solid ground floor concrete slab applications, the sump should be positioned directly beneath the Visqueen radon membrane.

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• Approvals and Standards
• System Components
• Storage and Handling
• Preparation
• Installation
• Usable Temperature Range
• Additional Information

Approvals and Standards

• Quality Management System ISO 9001:2015

System Components

The sump unit dimensions are 700mm x 700mm x 250mm high.

Storage and Handling

Visqueen Radon Sump should be stored horizontally, under cover in its original packaging. The sump should not be exposed to long periods of ultraviolet light.

Care should be taken when handling the product in line with current manual handling regulations.

Preparation

Excavate a minimum 750mm x 750mm x 350mm deep pit within the hardcore fill. For maximum depressurisation ensuring that the hardcore fill used does not contain excessive fines.

Do not connect the Visqueen Radon Sump to any part of the drainage system.

Installation

Remove the end of one of the four outlet ports on the Visqueen Radon Sump by cutting along the groove at the perimeter of the port with a fine toothed saw.

Position the sump in the base of the excavated pit and ensure it is level. Connect a 110mm diameter plastic pipe to the prepared outlet port of the sump. Extend the pipe horizontally so that it passes through the external wall. Ensure that all joints and couplings are airtight.

Backfill using a clean permeable material without excessive fines. Terminate the pipework just above ground level and approximately 100mm from the external face of the external wall. Cap off the pipe with an access plug. The pipe will then be ready to extend and vent if and when necessary. Provide an identification plate on the wall to indicate the presence of the Radon Pipe.

Do not connect the Visqueen Radon Sump to any part of the drainage system.

Where pipework is being installed vertically from the sump, ensure that all pipework joints and couplings are airtight, and that a Visqueen Preformed Top Hat is used where the pipework intersects with the Visqueen radon membrane.

Multiple sumps can the linked to a single 110mm diameter plastic pipe, however do not overload the system by linking excessive sump units.

Usable Temperature Range

Although there are no limitations to the usable temperature range for Visqueen Radon Sump, it is recommended that the Visqueen products associated with this system component should not be installed below 5°C.

Additional Information

If the substructure is comparmentalised i.e. has enclosed areas, then a sump may be required in each area. These may be connected to a central manifold sump and exhausted in the manner described in the above Installation section.