Visqueen Radon R400 Membrane 25m x 4m

Unit price per


PRE ORDER - This item is currently out of stock and will be delivered in 7 - 10 days

Visqueen Radon barrier membrane is manufactured from an enhanced blend of polymer films that is suitable for use in the protection of buildings from the ingress of radon gas and water vapour.

Price Includes VAT

Visqueen Radon Barrier Membrane R400 & Damp Proof Membrane

Visqueen Radon Barrier Membrane R400

  • BBA certified - third party accreditation
  • Complies with BBA regulations for radon protection barrier membranes
  • Strong and durable
  • Conforms to BR 211:2015 - industry guidance for radon protection
  • Also acts as a damp proof membrane
  • Lap joints can be taped, or heat welded

Visqueen Radon barrier membrane 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.

Approvals of Visqueen Radon Barrier Membrane R400

  • BBA 13/5069 - Third-party accreditation
  • Conforms to BR 211:2015 radon protection requirements
  • CE Mark EN 13967:2017

Visqueen Radon R400 Membrane is manufactured from an enhanced blend of polymer films that is suitable for use in the protection of buildings from the ingress of radon gas and vapour.

Visqueen Radon Membrane is also a gas, vapour and damp-proof membrane but is not intended for use where there is the risk of hydrostatic pressure.

Visqueen Radon Barrier Membrane and ancillary components must be used in accordance with the recommendations in the most recent edition of the Building Research Establishment Report BR 211:2015.

Radon Membrane can be used in most common floor constructions. It is installed in a similar way to a damp proof membrane, but with much greater attention paid to workmanship and detailing in order to achieve effective sealing at all locations.

Apply the Visqueen Radon Barrier Membrane

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.

  1. Ensure the substrate is clean and dry.
  2. Lay the Visqueen Radon R400 on the substrate.
  3. Joints should be overlapped by at least 150mm.
  4. Airtight seals should be formed around all service entry points.
  5. Cover the membrane as soon as possible with a 50m screed after installation to prevent damage. Care should be taken to ensure that the membrane is not punctured, stretched or displaced when applying a screed or final floor covering.
  6. 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.

Visqueen Radon Barrier Membrane Data Sheet

Visqueen Radon Installation Guide

FAQs Gas Barriers

Radon Barrier Products & Systems


Delivery within 2-5 days.  

BANK HOLIDAY: Next working day orders are dispatched on working days. Orders placed before 3pm Thursday will be dispatched Friday. After 3pm Thursday orders will be dispatched Tuesday for delivery Wednesday. 




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Next Working Day

(Order before 3pm for same day dispatch)

Under 2kg £4.95 £4.95 £7.95
Up to 30kg £6.95  £18 £10.95
30kg - 50kg £11.95 £25 £16.95
50kg - 100kg £18.95 £37.95 £27.95
100kg+ £45 £90 Not Currently Available
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Next working day delivery available on IN STOCK products.

Out of stock products will be delivered next working day from when they are received into the warehouse. 


Next Working Day Delivery Example

 Order placed Monday 11:30am Dispatched Monday pm Delivery Tuesday
Order placed Monday 4:30pm Dispatched Tuesday am Delivery Wednesday
Order placed Thursday 11:30am Dispatched Thursday pm Delivery Friday
Order placed Thursday 4:30pm Dispatched Friday am Delivery Monday


Click and Collect

Click and Collect available within one hour on orders placed between 8am and 3:30pm Monday to Friday (excluding Bank Holidays).
Orders placed outside of this time will be available within the next hour during the above slots. 
You will receive an email when your order is ready to collect. 
Collection Address: Unit 28, Ripley Business Park, Ripley Dr, Normanton Industrial Estate, Normanton WF6 1QT
*If you live in a restricted area and would like to query your shipping cost please call our customer service team (01977 876116) and they will be able to give you a personalised quote. 
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