Visqueen Radon R400 is used to prevent the ingress of radon in both basic and full radon protection areas. The membrane can be positioned within the ground floor construction either above or below the structural floor. The product is not intended for use where there is a risk of hydrostatic pressure.

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

Approvals and Standards

• Third party accreditation (BBA 13/5069)
• Conforms to the specification requirements of BR 211:2023
• CE Mark EN 13967:2017
• Quality Management System ISO 9001:2015
• Occupational Health and Safety System ISO 45001:2018
• Environmental Management System ISO 14001:2015

System Components

• VisqueenPro Double Sided Jointing Tape, 50mm x 10m
• VisqueenPro Single Sided Tape, 75mm x 25m
• Visqueen Gas Resistant Foil Lap Tape, 75mm x 50m
• Visqueen GR Lap Tape, 150mm x 10m
• Visqueen Top Hat Units
• Visqueen Preformed Units
• VisqueenPro Detailing Strip, 300mm x 10m, 500mm x 10m
• Visqueen Radon Sump

Storage and Handling

Visqueen Radon R400 should be stored horizontally, under cover in its original packaging.

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

Preparation

Visqueen Radon R400 should be installed on a smooth continuous surface e.g. grouted beam and block floor, a compacted blinding layer e.g. 50mm thick sand blinding, or smooth concrete blinding. The substrate should be free from irregularities such as voids or protrusions.

The membrane can be cut with a sharp retractable safety knife or robust scissors.

When installing the membrane in demanding site conditions, use Visqueen GR Lap Tape in place of Visqueen Pro Single Sided Tape or Visqueen Gas Resistant Foil Lap Tape.

Installation

Visqueen Radon R400 should be loose laid on the substrate. The membrane should be clean and dry at the time of jointing. Joints should be overlapped by at least 150mm, bonded with Visqueen Pro Double Sided Tape and sealed with either Visqueen Pro Single Sided Tape or Visqueen Gas Resistant Foil Lap Tape.

Alternatively lap joints can be heat welded to achieve an effective seal. Welded lap joints can be less than 150mm provided the joint integrity is not compromised.

Airtight seals should be formed around all service entry points. Visqueen Preformed Top Hat Units should be used for sealing service entry pipes. The base of the top hat and the upstand should be bonded using Visqueen Pro Double Sided Tape and sealed with either Visqueen Pro Single Sided Tape or Visqueen Gas Resistant Foil Lap Tape. The upstand should be secured with the supplied jubilee clip.

Forming an effective barrier to radon may give rise to complex three-dimensional detailing where, it is recommended Visqueen Preformed Units are used e.g. corners. Alternatively Visqueen Pro Detailing Strip can be used to seal awkward junctions.

If the membrane is punctured or perforated a patch of the same material should be lapped at least 150mm beyond the limits of the puncture and bonded with Visqueen Pro Double Sided Tape and sealed with either Visqueen Pro Single Sided Tape or Visqueen Gas Resistant Foil Lap Tape. Alternatively a patch can be formed using Visqueen Pro Detailing Strip and lapped at least 150mm beyond the extents of the puncture.

Long periods of exposure to ultraviolet light will reduce the effectiveness of the membrane. The membrane should be covered by a protective layer immediately after installation to prevent damage from following trades, ultraviolet light, etc. Care should be taken to ensure that the membrane is not punctured, stretched or displaced when applying a screed or final floor covering. A minimum thickness of 50mm screed is recommended.

When reinforced concrete is to be laid over the membrane the wire reinforcements and spacers must be prevented from puncturing the membrane. Where there is a high risk of potential damage, the membrane should be covered with Visqueen TreadGUARD protection, screed, or other approved protection material before positioning the reinforcement.

When used in full radon protection areas, a Visqueen Radon Sump or subfloor ventilation system maybe required. For further guidance contact our technical team on 0113 2455450 (option 2) or send a message to [email protected].

Usable Temperature Range

It is recommended that Visqueen Radon R400 and all associated system components should not be installed below 5°C.

Sustainability

Visqueen is part of Berry bpi, the largest European recycler of polyethylene.

This product is recyclable, categorised under LDPE recycling code 4 and any waste should be segregated on site in accordance with site management procedures for plastic waste. Visqueen have four recycling sites in the UK where the plastic waste could be recycled and converted back into a second life product.

Additional Information

When used in full radon protection areas, a Visqueen Radon Sump or subfloor ventilation system maybe required.

To assist build sequencing, Visqueen Zedex CPT DPC is available for radon protection through masonry wall constructions.

For internal and external corners Visqueen Preformed Corner Units should be used.

To seal around steel columns use Visqueen Pro Detailing Strip.

For additional detailing information, contact our technical team on 0113 2455450 (option 2) or send a message to [email protected].