Visqueen Radon R400 Membrane 4m x 20m

Visqueen Radon R400 is a 0.4mm thick co-polymer thermoplastic membrane. The product is red in colour and supplied 4m x 20m in a multi-folded roll.

Features & benefits
BBA certified - third party accreditation
0.4mm (1600 gauge) thick - complies with new BBA regulations for radon protection membranes in line with BS8485:2015+A1:2019
Increased thickness - provides greater impact properties and protection from following trades
Conforms to BR 211:2015 - industry guidance for radon protection
Multi folded - easy to handle and transport
Multi functional - also acts as a damp proof membrane
Dual jointing methods - lap joints can be taped or heat welded

Approvals and standards
Third party accreditation (BBA 13/5069)
Conforms to the specification requirements of BR 211:2015
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

Usage
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.

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.

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.